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<option value="toxins" > Toxins </option> <option value="transplantology" > Transplantology </option> <option value="traumacare" > Trauma Care </option> <option value="higheredu" > Trends in Higher Education </option> <option value="tropicalmed" > Tropical Medicine and Infectious Disease (TropicalMed) </option> <option value="universe" > Universe </option> <option value="urbansci" > Urban Science </option> <option value="uro" > Uro </option> <option value="vaccines" > Vaccines </option> <option value="vehicles" > Vehicles </option> <option value="venereology" > Venereology </option> <option value="vetsci" > Veterinary Sciences </option> <option value="vibration" > Vibration </option> <option value="virtualworlds" > Virtual Worlds </option> <option value="viruses" > Viruses </option> <option value="vision" > Vision </option> <option value="waste" > Waste </option> <option value="water" > Water </option> <option value="wild" > Wild </option> <option value="wind" > Wind </option> <option value="women" > Women </option> <option value="world" > World </option> <option value="wevj" > World Electric Vehicle Journal (WEVJ) </option> <option value="youth" > Youth </option> <option value="zoonoticdis" > Zoonotic Diseases </option> </select> </div> <div class="large-2 medium-2 small-6 columns "> <div class=""> <div class="search-input-label">Article Type</div> </div> <select id="article_type" tabindex="4" name="article_type" class="chosen-select"> <option value="">All Article Types</option> <option value="research-article">Article</option> <option value="review-article">Review</option> <option value="rapid-communication">Communication</option> <option value="editorial">Editorial</option> <option value="abstract">Abstract</option> <option value="book-review">Book Review</option> <option value="brief-communication">Brief Communication</option> <option value="brief-report">Brief Report</option> <option value="case-report">Case Report</option> <option 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class="remove-filter-container remove-filter-container--hidden"> <a href="#" class="remove-filter-link link--red " data-filterid="refine_countries_UNITED_STATES"> <i class="material-icons">remove_circle_outline</i> </a> <label> USA </label> </div/> <div class="remove-filter-container remove-filter-container--hidden"> <a href="#" class="remove-filter-link link--red " data-filterid="refine_countries_SPAIN"> <i class="material-icons">remove_circle_outline</i> </a> <label> Spain </label> </div/> <div class="remove-filter-container remove-filter-container--hidden"> <a href="#" class="remove-filter-link link--red " data-filterid="refine_countries_RUSSIAN_FEDERATION"> <i class="material-icons">remove_circle_outline</i> </a> <label> Russia </label> </div/> <div class="remove-filter-container remove-filter-container--hidden"> <a href="#" class="remove-filter-link link--red " data-filterid="refine_countries_KOREA_REPUBLIC_OF"> <i class="material-icons">remove_circle_outline</i> </a> <label> 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class="material-icons">remove_circle_outline</i> </a> <label> France </label> </div/> <div class="remove-filter-container remove-filter-container--hidden"> <a href="#" class="remove-filter-link link--red " data-filterid="refine_countries_ROMANIA"> <i class="material-icons">remove_circle_outline</i> </a> <label> Romania </label> </div/> <div class="remove-filter-container remove-filter-container--hidden"> <a href="#" class="remove-filter-link link--red " data-filterid="refine_countries_INDIA"> <i class="material-icons">remove_circle_outline</i> </a> <label> India </label> </div/> <div class="remove-filter-container remove-filter-container--hidden"> <a href="#" class="remove-filter-link link--red " data-filterid="refine_countries_JAPAN"> <i class="material-icons">remove_circle_outline</i> </a> <label> Japan </label> </div/> <div class="remove-filter-container remove-filter-container--hidden"> <a href="#" class="remove-filter-link link--red " data-filterid="refine_countries_TAIWAN"> <i class="material-icons">remove_circle_outline</i> </a> <label> Taiwan </label> </div/> <div class="remove-filter-container remove-filter-container--hidden"> <a href="#" class="remove-filter-link link--red " data-filterid="refine_countries_SAUDI_ARABIA"> <i class="material-icons">remove_circle_outline</i> </a> <label> Saudi Arabia </label> </div/> <div class="remove-filter-container remove-filter-container--hidden"> <a href="#" class="remove-filter-link link--red " data-filterid="refine_countries_UNITED_KINGDOM"> <i class="material-icons">remove_circle_outline</i> </a> <label> UK </label> </div/> <div class="remove-filter-container remove-filter-container--hidden"> <a href="#" class="remove-filter-link link--red " data-filterid="refine_countries_EGYPT"> <i class="material-icons">remove_circle_outline</i> </a> <label> Egypt </label> </div/> <div class="remove-filter-container remove-filter-container--hidden"> <a href="#" class="remove-filter-link link--red " data-filterid="refine_countries_CZECH_REPUBLIC"> <i class="material-icons">remove_circle_outline</i> </a> <label> Czech Republic </label> </div/> <div class="remove-filter-container remove-filter-container--hidden"> <a href="#" class="remove-filter-link link--red " data-filterid="refine_countries_GREECE"> <i class="material-icons">remove_circle_outline</i> </a> <label> Greece </label> </div/> <div class="remove-filter-container remove-filter-container--hidden"> <a href="#" class="remove-filter-link link--red " data-filterid="refine_countries_CANADA"> <i class="material-icons">remove_circle_outline</i> </a> <label> Canada </label> </div/> <div class="remove-filter-container remove-filter-container--hidden"> <a href="#" class="remove-filter-link link--red " data-filterid="refine_countries_MEXICO"> <i class="material-icons">remove_circle_outline</i> </a> <label> Mexico </label> </div/> <div class="remove-filter-container remove-filter-container--hidden"> <a href="#" class="remove-filter-link link--red " data-filterid="refine_countries_POLAND"> <i class="material-icons">remove_circle_outline</i> </a> <label> Poland </label> </div/> <div class="remove-filter-container remove-filter-container--hidden"> <a href="#" class="remove-filter-link link--red " data-filterid="refine_countries_IRAN_ISLAMIC_REPUBLIC_OF"> <i class="material-icons">remove_circle_outline</i> </a> <label> Iran </label> </div/> <div class="remove-filter-container remove-filter-container--hidden"> <a href="#" class="remove-filter-link link--red " data-filterid="refine_countries_AUSTRALIA"> <i class="material-icons">remove_circle_outline</i> </a> <label> Australia </label> </div/> <div class="remove-filter-container remove-filter-container--hidden"> <a href="#" class="remove-filter-link link--red " data-filterid="refine_countries_AUSTRIA"> <i class="material-icons">remove_circle_outline</i> </a> <label> Austria </label> </div/> <div class="remove-filter-container remove-filter-container--hidden"> <a href="#" class="remove-filter-link link--red " data-filterid="refine_countries_TURKEY"> <i class="material-icons">remove_circle_outline</i> </a> <label> Turkey (Türkiye) </label> </div/> <div class="remove-filter-container remove-filter-container--hidden"> <a href="#" class="remove-filter-link link--red " data-filterid="refine_countries_BELGIUM"> <i class="material-icons">remove_circle_outline</i> </a> <label> Belgium </label> </div/> <div class="remove-filter-container remove-filter-container--hidden"> <a href="#" class="remove-filter-link link--red " data-filterid="refine_countries_HUNGARY"> <i class="material-icons">remove_circle_outline</i> </a> <label> Hungary </label> </div/> <div class="remove-filter-container remove-filter-container--hidden"> <a href="#" class="remove-filter-link link--red " data-filterid="refine_countries_IRELAND"> <i class="material-icons">remove_circle_outline</i> </a> <label> Ireland </label> </div/> <div class="remove-filter-container remove-filter-container--hidden"> <a href="#" class="remove-filter-link link--red " data-filterid="refine_countries_PAKISTAN"> <i class="material-icons">remove_circle_outline</i> </a> <label> Pakistan </label> </div/> <div class="remove-filter-container remove-filter-container--hidden"> <a href="#" class="remove-filter-link link--red " data-filterid="refine_countries_SWITZERLAND"> <i class="material-icons">remove_circle_outline</i> </a> <label> Switzerland </label> </div/> <div class="remove-filter-container remove-filter-container--hidden"> <a href="#" class="remove-filter-link link--red " data-filterid="refine_countries_CROATIA"> <i class="material-icons">remove_circle_outline</i> </a> <label> Croatia </label> </div/> <div class="remove-filter-container remove-filter-container--hidden"> <a href="#" class="remove-filter-link link--red " data-filterid="refine_countries_INDONESIA"> <i class="material-icons">remove_circle_outline</i> </a> <label> Indonesia </label> </div/> <div class="remove-filter-container remove-filter-container--hidden"> <a href="#" class="remove-filter-link link--red " data-filterid="refine_countries_SERBIA"> <i class="material-icons">remove_circle_outline</i> </a> <label> Serbia </label> </div/> <div class="remove-filter-container remove-filter-container--hidden"> <a href="#" class="remove-filter-link link--red " data-filterid="refine_countries_ARGENTINA"> <i class="material-icons">remove_circle_outline</i> </a> <label> Argentina </label> </div/> <div class="remove-filter-container remove-filter-container--hidden"> <a href="#" class="remove-filter-link link--red " data-filterid="refine_countries_SLOVAKIA"> <i class="material-icons">remove_circle_outline</i> </a> <label> Slovakia </label> </div/> <div class="remove-filter-container remove-filter-container--hidden"> <a href="#" class="remove-filter-link link--red " data-filterid="refine_countries_MALAYSIA"> <i class="material-icons">remove_circle_outline</i> </a> <label> Malaysia </label> </div/> <div class="remove-filter-container remove-filter-container--hidden"> <a href="#" class="remove-filter-link link--red " data-filterid="refine_countries_TUNISIA"> <i class="material-icons">remove_circle_outline</i> </a> <label> Tunisia </label> </div/> <div class="remove-filter-container remove-filter-container--hidden"> <a href="#" class="remove-filter-link link--red " data-filterid="refine_countries_DENMARK"> <i class="material-icons">remove_circle_outline</i> </a> <label> Denmark </label> </div/> <div class="remove-filter-container remove-filter-container--hidden"> <a href="#" class="remove-filter-link link--red " data-filterid="refine_countries_LITHUANIA"> <i class="material-icons">remove_circle_outline</i> </a> <label> Lithuania </label> </div/> <div class="remove-filter-container remove-filter-container--hidden"> <a href="#" class="remove-filter-link link--red " data-filterid="refine_countries_SINGAPORE"> <i class="material-icons">remove_circle_outline</i> </a> <label> Singapore </label> </div/> <div class="remove-filter-container remove-filter-container--hidden"> <a href="#" class="remove-filter-link link--red " data-filterid="refine_countries_THAILAND"> <i class="material-icons">remove_circle_outline</i> </a> <label> Thailand </label> </div/> <div class="remove-filter-container remove-filter-container--hidden"> <a href="#" class="remove-filter-link link--red " data-filterid="refine_countries_SWEDEN"> <i class="material-icons">remove_circle_outline</i> </a> <label> Sweden </label> </div/> <div class="remove-filter-container remove-filter-container--hidden"> <a href="#" class="remove-filter-link link--red " data-filterid="refine_countries_CHILE"> <i class="material-icons">remove_circle_outline</i> </a> <label> Chile </label> </div/> <div class="remove-filter-container remove-filter-container--hidden"> <a href="#" class="remove-filter-link link--red " data-filterid="refine_countries_ESTONIA"> <i class="material-icons">remove_circle_outline</i> </a> <label> Estonia </label> </div/> <div class="remove-filter-container remove-filter-container--hidden"> <a href="#" class="remove-filter-link link--red " data-filterid="refine_countries_NETHERLANDS"> <i class="material-icons">remove_circle_outline</i> </a> <label> The Netherlands </label> </div/> <div class="remove-filter-container remove-filter-container--hidden"> <a href="#" class="remove-filter-link link--red " data-filterid="refine_countries_SOUTH_AFRICA"> <i class="material-icons">remove_circle_outline</i> </a> <label> South Africa </label> </div/> <div class="remove-filter-container remove-filter-container--hidden"> <a href="#" class="remove-filter-link link--red " data-filterid="refine_countries_MOROCCO"> <i class="material-icons">remove_circle_outline</i> </a> <label> Morocco </label> </div/> <div class="remove-filter-container remove-filter-container--hidden"> <a href="#" class="remove-filter-link link--red " data-filterid="refine_countries_UNITED_ARAB_EMIRATES"> <i class="material-icons">remove_circle_outline</i> </a> <label> United Arab Emirates </label> </div/> <div class="remove-filter-container remove-filter-container--hidden"> <a href="#" class="remove-filter-link link--red " data-filterid="refine_countries_ALGERIA"> <i class="material-icons">remove_circle_outline</i> </a> <label> Algeria </label> </div/> <div class="remove-filter-container remove-filter-container--hidden"> <a href="#" class="remove-filter-link link--red " data-filterid="refine_countries_COLOMBIA"> <i class="material-icons">remove_circle_outline</i> </a> <label> Colombia </label> </div/> <div class="remove-filter-container remove-filter-container--hidden"> <a href="#" class="remove-filter-link link--red " data-filterid="refine_countries_ISRAEL"> <i class="material-icons">remove_circle_outline</i> </a> <label> Israel </label> </div/> <div class="remove-filter-container remove-filter-container--hidden"> <a href="#" class="remove-filter-link link--red " data-filterid="refine_countries_SLOVENIA"> <i class="material-icons">remove_circle_outline</i> </a> <label> Slovenia </label> </div/> <div class="remove-filter-container remove-filter-container--hidden"> <a href="#" class="remove-filter-link link--red " data-filterid="refine_countries_IRAQ"> <i class="material-icons">remove_circle_outline</i> </a> <label> Iraq </label> </div/> <div class="remove-filter-container remove-filter-container--hidden"> <a href="#" class="remove-filter-link link--red " data-filterid="refine_countries_BULGARIA"> <i class="material-icons">remove_circle_outline</i> </a> <label> Bulgaria </label> </div/> <div class="remove-filter-container remove-filter-container--hidden"> <a href="#" class="remove-filter-link link--red " data-filterid="refine_countries_FINLAND"> <i class="material-icons">remove_circle_outline</i> </a> <label> Finland </label> </div/> <div class="remove-filter-container remove-filter-container--hidden"> <a href="#" class="remove-filter-link link--red " data-filterid="refine_countries_VIETNAM"> <i class="material-icons">remove_circle_outline</i> </a> <label> Vietnam </label> </div/> <div class="remove-filter-container remove-filter-container--hidden"> <a href="#" class="remove-filter-link link--red " data-filterid="refine_countries_NORWAY"> <i class="material-icons">remove_circle_outline</i> </a> <label> Norway </label> </div/> <div class="remove-filter-container remove-filter-container--hidden"> <a href="#" class="remove-filter-link link--red " data-filterid="refine_countries_UKRAINE"> <i class="material-icons">remove_circle_outline</i> </a> <label> Ukraine </label> </div/> <div class="remove-filter-container remove-filter-container--hidden"> <a href="#" class="remove-filter-link link--red " data-filterid="refine_countries_BELARUS"> <i class="material-icons">remove_circle_outline</i> </a> <label> Belarus </label> </div/> <div class="remove-filter-container remove-filter-container--hidden"> <a href="#" class="remove-filter-link link--red " data-filterid="refine_countries_ECUADOR"> <i class="material-icons">remove_circle_outline</i> </a> <label> Ecuador </label> </div/> <div class="remove-filter-container remove-filter-container--hidden"> <a href="#" class="remove-filter-link link--red " data-filterid="refine_countries_GHANA"> <i class="material-icons">remove_circle_outline</i> </a> <label> Ghana </label> </div/> <div class="remove-filter-container remove-filter-container--hidden"> <a href="#" class="remove-filter-link link--red " data-filterid="refine_countries_KENYA"> <i class="material-icons">remove_circle_outline</i> </a> <label> Kenya </label> </div/> <div class="remove-filter-container remove-filter-container--hidden"> <a href="#" class="remove-filter-link link--red " data-filterid="refine_countries_NIGERIA"> <i class="material-icons">remove_circle_outline</i> </a> <label> Nigeria </label> </div/> <div class="remove-filter-container remove-filter-container--hidden"> <a href="#" class="remove-filter-link link--red " data-filterid="refine_countries_PHILIPPINES"> <i class="material-icons">remove_circle_outline</i> </a> <label> Philippines </label> </div/> <div class="remove-filter-container remove-filter-container--hidden"> <a href="#" class="remove-filter-link link--red " data-filterid="refine_countries_SYRIAN_ARAB_REPUBLIC"> <i class="material-icons">remove_circle_outline</i> </a> <label> Syrian Arab Republic </label> </div/> <div class="remove-filter-container remove-filter-container--hidden"> <a href="#" class="remove-filter-link link--red " data-filterid="refine_countries_CAMEROON"> <i class="material-icons">remove_circle_outline</i> </a> <label> Cameroon </label> </div/> <div class="remove-filter-container remove-filter-container--hidden"> <a href="#" class="remove-filter-link link--red " data-filterid="refine_countries_KAZAKHSTAN"> <i class="material-icons">remove_circle_outline</i> </a> <label> Kazakhstan </label> </div/> <div class="remove-filter-container remove-filter-container--hidden"> <a href="#" class="remove-filter-link link--red " data-filterid="refine_countries_KUWAIT"> <i class="material-icons">remove_circle_outline</i> </a> <label> Kuwait </label> </div/> <div class="remove-filter-container remove-filter-container--hidden"> <a href="#" class="remove-filter-link link--red " data-filterid="refine_countries_LATVIA"> <i class="material-icons">remove_circle_outline</i> </a> <label> Latvia </label> </div/> <div class="remove-filter-container remove-filter-container--hidden"> <a href="#" class="remove-filter-link link--red " data-filterid="refine_countries_MALTA"> <i class="material-icons">remove_circle_outline</i> </a> <label> Malta </label> </div/> <div class="remove-filter-container remove-filter-container--hidden"> <a href="#" class="remove-filter-link link--red " data-filterid="refine_countries_MOLDOVA"> <i class="material-icons">remove_circle_outline</i> </a> <label> Moldova </label> </div/> <div class="remove-filter-container remove-filter-container--hidden"> <a href="#" class="remove-filter-link link--red " data-filterid="refine_countries_QATAR"> <i class="material-icons">remove_circle_outline</i> </a> <label> Qatar </label> </div/> <div class="remove-filter-container remove-filter-container--hidden"> <a href="#" class="remove-filter-link link--red " data-filterid="refine_countries_UZBEKISTAN"> <i class="material-icons">remove_circle_outline</i> </a> <label> Uzbekistan </label> </div/> <div class="remove-filter-container remove-filter-container--hidden"> <a href="#" class="remove-filter-link link--red " data-filterid="refine_countries_NORTH_MACEDONIA"> <i class="material-icons">remove_circle_outline</i> </a> <label> North Macedonia </label> </div/> <div class="remove-filter-container remove-filter-container--hidden"> <a href="#" class="remove-filter-link link--red " data-filterid="refine_countries_ALBANIA"> <i class="material-icons">remove_circle_outline</i> </a> <label> Albania </label> </div/> <div class="remove-filter-container remove-filter-container--hidden"> <a href="#" class="remove-filter-link link--red " data-filterid="refine_countries_ARMENIA"> <i class="material-icons">remove_circle_outline</i> </a> <label> Armenia </label> </div/> <div class="remove-filter-container remove-filter-container--hidden"> <a href="#" class="remove-filter-link link--red " data-filterid="refine_countries_BANGLADESH"> <i class="material-icons">remove_circle_outline</i> </a> <label> Bangladesh </label> </div/> <div class="remove-filter-container remove-filter-container--hidden"> <a href="#" class="remove-filter-link link--red " data-filterid="refine_countries_CUBA"> <i class="material-icons">remove_circle_outline</i> </a> <label> Cuba </label> </div/> <div class="remove-filter-container remove-filter-container--hidden"> <a href="#" class="remove-filter-link link--red " data-filterid="refine_countries_ETHIOPIA"> <i class="material-icons">remove_circle_outline</i> </a> <label> Ethiopia </label> </div/> <div class="remove-filter-container remove-filter-container--hidden"> <a href="#" class="remove-filter-link link--red " data-filterid="refine_countries_JORDAN"> <i class="material-icons">remove_circle_outline</i> </a> <label> Jordan </label> </div/> <div class="remove-filter-container remove-filter-container--hidden"> <a href="#" class="remove-filter-link link--red " data-filterid="refine_countries_LEBANON"> <i class="material-icons">remove_circle_outline</i> </a> <label> Lebanon </label> </div/> <div class="remove-filter-container remove-filter-container--hidden"> <a href="#" class="remove-filter-link link--red " data-filterid="refine_countries_LIBYAN_ARAB_JAMAHIRIYA"> <i class="material-icons">remove_circle_outline</i> </a> <label> Libya </label> </div/> <div class="remove-filter-container remove-filter-container--hidden"> <a href="#" class="remove-filter-link link--red " data-filterid="refine_countries_LUXEMBOURG"> <i class="material-icons">remove_circle_outline</i> </a> <label> Luxembourg </label> </div/> <div class="remove-filter-container remove-filter-container--hidden"> <a href="#" class="remove-filter-link link--red " data-filterid="refine_countries_NEW_ZEALAND"> <i class="material-icons">remove_circle_outline</i> </a> <label> New Zealand </label> </div/> <div class="remove-filter-container remove-filter-container--hidden"> <a href="#" class="remove-filter-link link--red " data-filterid="refine_countries_PERU"> <i class="material-icons">remove_circle_outline</i> </a> <label> Peru </label> </div/> <div class="remove-filter-container remove-filter-container--hidden"> <a href="#" class="remove-filter-link link--red " data-filterid="refine_countries_RWANDA"> <i class="material-icons">remove_circle_outline</i> </a> <label> Rwanda </label> </div/> <div class="remove-filter-container remove-filter-container--hidden"> <a href="#" class="remove-filter-link link--red " data-filterid="refine_countries_SRI_LANKA"> <i class="material-icons">remove_circle_outline</i> </a> <label> Sri Lanka </label> </div/> <div class="remove-filter-container remove-filter-container--hidden"> <a href="#" class="remove-filter-link link--red " data-filterid="refine_countries_TANZANIA_UNITED_REPUBLIC_OF"> <i class="material-icons">remove_circle_outline</i> </a> <label> Tanzania </label> </div/> <div class="remove-filter-container remove-filter-container--hidden"> <a href="#" class="remove-filter-link link--red " data-filterid="refine_countries_PALESTINE"> <i class="material-icons">remove_circle_outline</i> </a> <label> Palestine </label> </div/> <div class="remove-filter-container remove-filter-container--hidden"> <a href="#" class="remove-filter-link link--red " data-filterid="refine_countries_Kosovo"> <i class="material-icons">remove_circle_outline</i> </a> <label> Kosovo </label> </div/> </div> <div class="filter-actions-container filter-actions-container--filled filter-actions-container--hidden"> <a class="js-refine-filter" data-reveal-id="refine-modal-countries" data-filter="countries"><strong>Add Countries / Regions</strong></a> <a href="#" class="remove-refines link--red right" data-refineid="countries"><strong>Reset</strong></a> </div> <div class="filter-actions-container filter-actions-container--empty "> <a class="button button--color button--full-width js-refine-filter" href="#" data-reveal-id="refine-modal-countries" data-filter="countries" class="all">Select Countries / Regions</a> </div> <div style="clear:both;"></div> <div id="refine-modal-countries" class="reveal-modal reveal-modal-new" data-reveal aria-labelledby="modalTitle" aria-hidden="true" role="dialog"> <div class="row"> <div class="small-12 columns"> <h2>Filter Countries / Regions</h2> <input class="js-filter" type="text" form="temp" placeholder="Search for Countries / Regions" style="width: 100%; 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class="UD_Listings_ArticlePDF" title="Article PDF" data-name="Rapid Correction of Turbidity Interference on Chemical Oxygen Demand Measurements by Using Ultraviolet-Visible Spectrometry" data-journal="chemosensors"> <i class="material-icons custom-download"></i> </a> </div> <div class="article-icons"><span class="label openaccess" data-dropdown="drop-article-label-openaccess" aria-expanded="false">Open Access</span><span class="label articletype">Article</span></div> <a class="title-link" href="/2227-9040/12/12/247">Rapid Correction of Turbidity Interference on Chemical Oxygen Demand Measurements by Using Ultraviolet-Visible Spectrometry</a> <div class="authors"> by <span class="inlineblock "><strong>Shihan Shan</strong>, </span><span class="inlineblock "><strong>Yihuan Ji</strong>, </span><span class="inlineblock "><strong>Hanjing Deng</strong>, </span><span class="inlineblock "><strong>Zhuohui Wu</strong>, </span><span class="inlineblock "><strong>Tinglong Yang</strong> and </span><span class="inlineblock "><strong>Xiaoping Wang</strong></span> </div> <div class="color-grey-dark"> <em>Chemosensors</em> <b>2024</b>, <em>12</em>(12), 247; <a href="https://doi.org/10.3390/chemosensors12120247">https://doi.org/10.3390/chemosensors12120247</a> - 24 Nov 2024 </div> Viewed by 326 <div class="abstract-div"> <a href="#" onclick="$(this).next('.abstract-cropped').toggleClass('inline').next('.abstract-full').toggleClass('inline'); return false;"> <strong>Abstract </strong> </a> <div class="abstract-cropped inline"> We developed a simple, rapid, and high-precision method to compensate for the turbidity interference in the measurement of water parameters using ultraviolet-visible spectrometry. By combining direct orthogonal signal correction (DOSC) with partial least squares (PLS), we corrected the full spectra (220 nm to <a href="#" data-counterslink = "https://www.mdpi.com/2227-9040/12/12/247/more" onclick="$(this).parents('.abstract-cropped').toggleClass('inline').next('.abstract-full').toggleClass('inline'); return false;"> [...] Read more.</a> </div> <div class="abstract-full "> We developed a simple, rapid, and high-precision method to compensate for the turbidity interference in the measurement of water parameters using ultraviolet-visible spectrometry. By combining direct orthogonal signal correction (DOSC) with partial least squares (PLS), we corrected the full spectra (220 nm to 600 nm), significantly enhancing the accuracy of the water parameter calculations. First, DOSC was applied to filter out turbidity-related components, retaining only the spectral elements most closely associated with the target substance, without requiring a standard baseline for the turbidity effect. Then, 13 wavelengths were selected from the corrected full spectra to construct the discrete absorption spectra. Further, a PLS regression model was established based on the corrected discrete absorption spectra and their corresponding concentrations. In our experiment, this method effectively eliminated the blue shift and peak height reduction caused by turbidity, especially in shorter wavelengths, which are more sensitive to interference. Moreover, when applied to new samples, the correlation coefficients (R<sup>2</sup>) between the predicted and actual values improved from 0.5455 to 0.9997, and the root mean square error (RMSE) decreased from 12.3604 to 0.2295 after correction. Overall, the DOSC-PLS method, together with ultraviolet-visible spectrometry, posed a great potential for the precise monitoring of target water parameters in field studies. <a href="/2227-9040/12/12/247">Full article</a> </div> </div> <div class="belongsTo" style="margin-bottom: 10px;"> (This article belongs to the Special Issue <a href=" /journal/chemosensors/special_issues/K8E9EKSM49 ">Feature Papers in the Section "Analytical Methods, Instrumentation and Miniaturization"</a>)<br/> </div> <a href="#" class="abstract-figures-show" data-counterslink = "https://www.mdpi.com/2227-9040/12/12/247/show" ><span >►</span><span style=" display: none;">▼</span> Show Figures </a><div class="abstract-image-preview "><div class="arrow left-arrow" id="prev1528233"><i class="fa fa-caret-left"></i></div><div class="arrow right-arrow" id="next1528233"><i class="fa fa-caret-right"></i></div><div class="absgraph cycle-slideshow manual" data-cycle-fx="scrollHorz" data-cycle-timeout="0" data-cycle-next="#next1528233" data-cycle-prev="#prev1528233" data-cycle-progressive="#images1528233" data-cycle-slides=">div" data-cycle-log="false"><div class='openpopupgallery cycle-slide' data-imgindex='0' data-target='article-1528233-popup'><span class="helper"></span><img src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=" data-src="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00247/article_deploy/html/images/chemosensors-12-00247-g001-550.jpg?1732443102" alt="" style="border: 0;"><p>Figure 1</p></div><script id="images1528233" type="text/cycle" data-cycle-split="---"><div class='openpopupgallery' data-imgindex='1' data-target='article-1528233-popup'><span class="helper"></span><img src='https://pub.mdpi-res.com/chemosensors/chemosensors-12-00247/article_deploy/html/images/chemosensors-12-00247-g002-550.jpg?1732443103'><p>Figure 2</p></div> --- <div class='openpopupgallery' data-imgindex='2' data-target='article-1528233-popup'><span class="helper"></span><img src='https://pub.mdpi-res.com/chemosensors/chemosensors-12-00247/article_deploy/html/images/chemosensors-12-00247-g003-550.jpg?1732443104'><p>Figure 3</p></div> --- <div class='openpopupgallery' data-imgindex='3' data-target='article-1528233-popup'><span class="helper"></span><img src='https://pub.mdpi-res.com/chemosensors/chemosensors-12-00247/article_deploy/html/images/chemosensors-12-00247-g004a-550.jpg?1732443106'><p>Figure 4</p></div> --- <div class='openpopupgallery' data-imgindex='4' data-target='article-1528233-popup'><span class="helper"></span><img src='https://pub.mdpi-res.com/chemosensors/chemosensors-12-00247/article_deploy/html/images/chemosensors-12-00247-g004b-550.jpg?1732443109'><p>Figure 4 Cont.</p></div> --- <div class='openpopupgallery' data-imgindex='5' data-target='article-1528233-popup'><span class="helper"></span><img src='https://pub.mdpi-res.com/chemosensors/chemosensors-12-00247/article_deploy/html/images/chemosensors-12-00247-g005-550.jpg?1732443111'><p>Figure 5</p></div> --- <div class='openpopupgallery' data-imgindex='6' data-target='article-1528233-popup'><span class="helper"></span><img src='https://pub.mdpi-res.com/chemosensors/chemosensors-12-00247/article_deploy/html/images/chemosensors-12-00247-g006-550.jpg?1732443112'><p>Figure 6</p></div> --- <div class='openpopupgallery' data-imgindex='7' data-target='article-1528233-popup'><span class="helper"></span><img src='https://pub.mdpi-res.com/chemosensors/chemosensors-12-00247/article_deploy/html/images/chemosensors-12-00247-g007-550.jpg?1732443113'><p>Figure 7</p></div> --- <div class='openpopupgallery' data-imgindex='8' data-target='article-1528233-popup'><span class="helper"></span><img src='https://pub.mdpi-res.com/chemosensors/chemosensors-12-00247/article_deploy/html/images/chemosensors-12-00247-g008-550.jpg?1732443116'><p>Figure 8</p></div> --- <div class='openpopupgallery' data-imgindex='9' data-target='article-1528233-popup'><span class="helper"></span><img src='https://pub.mdpi-res.com/chemosensors/chemosensors-12-00247/article_deploy/html/images/chemosensors-12-00247-g009-550.jpg?1732443117'><p>Figure 9</p></div></script></div></div><div id="article-1528233-popup" class="popupgallery" style="display: inline; line-height: 200%"><a href="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00247/article_deploy/html/images/chemosensors-12-00247-g001-550.jpg?1732443102" title=" <strong>Figure 1</strong><br/> <p>Analysis diagrams of different types of light in a system with mixed turbidity and a target substance. (<b>a</b>) Ideal situation; (<b>b</b>) actual situation. <math display="inline"><semantics> <mrow> <msub> <mrow> <mi>I</mi> </mrow> <mrow> <mi>t</mi> <mo>_</mo> <mi>t</mi> <mi>u</mi> <mi>r</mi> </mrow> </msub> </mrow> </semantics></math> is the transmitted light though the turbidity, while <math display="inline"><semantics> <mrow> <msubsup> <mrow> <mi>I</mi> </mrow> <mrow> <mi>t</mi> <mo>_</mo> <mi>t</mi> <mi>u</mi> <mi>r</mi> </mrow> <mrow> <mo>′</mo> </mrow> </msubsup> </mrow> </semantics></math> is the actual incident light for the target substance.</p> <strong style='display: block; margin-top: 10px; font-size: 18px;'><a style='color: #fff' href='/2227-9040/12/12/247'>Full article</a></strong> "></a><a href="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00247/article_deploy/html/images/chemosensors-12-00247-g002-550.jpg?1732443103" title=" <strong>Figure 2</strong><br/> <p>The procedure of the DOSC-PLS model.</p> <strong style='display: block; margin-top: 10px; font-size: 18px;'><a style='color: #fff' href='/2227-9040/12/12/247'>Full article</a></strong> "></a><a href="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00247/article_deploy/html/images/chemosensors-12-00247-g003-550.jpg?1732443104" title=" <strong>Figure 3</strong><br/> <p>Absorbance curves of various turbidity solutions. (<b>a</b>) Original curve; (<b>b</b>) normalized curve.</p> <strong style='display: block; margin-top: 10px; font-size: 18px;'><a style='color: #fff' href='/2227-9040/12/12/247'>Full article</a></strong> "></a><a href="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00247/article_deploy/html/images/chemosensors-12-00247-g004a-550.jpg?1732443106" title=" <strong>Figure 4</strong><br/> <p>The optical properties and the influence of the standard turbidity on the standard COD solutions. (<b>a</b>) Absorbance curve of standard COD solutions; (<b>b</b>) absorbance of standard COD solutions at 280 nm; (<b>c</b>) absorbance curve of mixed solution with COD value of 40 mg/L; (<b>d</b>) absorbance of mixed solutions at 280 nm; (<b>e</b>) after direct subtraction; (<b>f</b>) absorbance at 280 nm of corrected curve by direct subtraction.</p> <strong style='display: block; margin-top: 10px; font-size: 18px;'><a style='color: #fff' href='/2227-9040/12/12/247'>Full article</a></strong> "></a><a href="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00247/article_deploy/html/images/chemosensors-12-00247-g004b-550.jpg?1732443109" title=" <strong>Figure 4 Cont.</strong><br/> <p>The optical properties and the influence of the standard turbidity on the standard COD solutions. (<b>a</b>) Absorbance curve of standard COD solutions; (<b>b</b>) absorbance of standard COD solutions at 280 nm; (<b>c</b>) absorbance curve of mixed solution with COD value of 40 mg/L; (<b>d</b>) absorbance of mixed solutions at 280 nm; (<b>e</b>) after direct subtraction; (<b>f</b>) absorbance at 280 nm of corrected curve by direct subtraction.</p> <strong style='display: block; margin-top: 10px; font-size: 18px;'><a style='color: #fff' href='/2227-9040/12/12/247'>Full article</a></strong> "></a><a href="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00247/article_deploy/html/images/chemosensors-12-00247-g005-550.jpg?1732443111" title=" <strong>Figure 5</strong><br/> <p>The corrected spectra of the training set. (<b>a</b>) Full spectra; (<b>b</b>) discrete spectra.</p> <strong style='display: block; margin-top: 10px; font-size: 18px;'><a style='color: #fff' href='/2227-9040/12/12/247'>Full article</a></strong> "></a><a href="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00247/article_deploy/html/images/chemosensors-12-00247-g006-550.jpg?1732443112" title=" <strong>Figure 6</strong><br/> <p>Results of testing sets using DOSC-PLS. (<b>a</b>) Corrected spectra; (<b>b</b>) predicted COD values, with and without correction.</p> <strong style='display: block; margin-top: 10px; font-size: 18px;'><a style='color: #fff' href='/2227-9040/12/12/247'>Full article</a></strong> "></a><a href="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00247/article_deploy/html/images/chemosensors-12-00247-g007-550.jpg?1732443113" title=" <strong>Figure 7</strong><br/> <p>The absorption spectra of mixed solutions with a COD value of 40 mg/L and turbidity levels of 15, 25, 35, and 45 NTU, after correction by different methods. (<b>a</b>) MSC; (<b>b</b>) DOSC.</p> <strong style='display: block; margin-top: 10px; font-size: 18px;'><a style='color: #fff' href='/2227-9040/12/12/247'>Full article</a></strong> "></a><a href="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00247/article_deploy/html/images/chemosensors-12-00247-g008-550.jpg?1732443116" title=" <strong>Figure 8</strong><br/> <p>Predicted COD concentration of new samples using different methods. (<b>a</b>) Total; (<b>b</b>) DOSC-PLS; (<b>c</b>) DOSC-BP.</p> <strong style='display: block; margin-top: 10px; font-size: 18px;'><a style='color: #fff' href='/2227-9040/12/12/247'>Full article</a></strong> "></a><a href="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00247/article_deploy/html/images/chemosensors-12-00247-g009-550.jpg?1732443117" title=" <strong>Figure 9</strong><br/> <p>Correlation between the actual COD values measured using the potassium dichromate method and the COD values predicted by the DOSC-PLS.</p> <strong style='display: block; margin-top: 10px; font-size: 18px;'><a style='color: #fff' href='/2227-9040/12/12/247'>Full article</a></strong> "></a></div> </div> </div> <div class="generic-item article-item"> <input class="article-list-checkbox export-element" type="checkbox" name="articles_ids[]" value="1527774" data-select-all-name="article-listing"> <div class="article-content"> <div class="label right label__btn"> <span style="font-size: 12px; color: #1a1a1a;"> 20 pages, 1456 KiB   </span> <a href="/2227-9040/12/12/246/pdf?version=1732353708" class="UD_Listings_ArticlePDF" title="Article PDF" data-name="Development of All-Solid-State Potentiometric Sensors for Monitoring Carbendazim Residues in Oranges: A Degradation Kinetics Investigation" data-journal="chemosensors"> <i class="material-icons custom-download"></i> </a> </div> <div class="article-icons"><span class="label openaccess" data-dropdown="drop-article-label-openaccess" aria-expanded="false">Open Access</span><span class="label articletype">Article</span></div> <a class="title-link" href="/2227-9040/12/12/246">Development of All-Solid-State Potentiometric Sensors for Monitoring Carbendazim Residues in Oranges: A Degradation Kinetics Investigation</a> <div class="authors"> by <span class="inlineblock "><strong>Yasmeen A. A. Hassan</strong>, </span><span class="inlineblock "><strong>Sherif Okeil</strong>, </span><span class="inlineblock "><strong>Miriam F. Ayad</strong>, </span><span class="inlineblock "><strong>Lobna A. Hussein</strong> and </span><span class="inlineblock "><strong>Nermine V. Fares</strong></span> </div> <div class="color-grey-dark"> <em>Chemosensors</em> <b>2024</b>, <em>12</em>(12), 246; <a href="https://doi.org/10.3390/chemosensors12120246">https://doi.org/10.3390/chemosensors12120246</a> - 23 Nov 2024 </div> Viewed by 161 <div class="abstract-div"> <a href="#" onclick="$(this).next('.abstract-cropped').toggleClass('inline').next('.abstract-full').toggleClass('inline'); return false;"> <strong>Abstract </strong> </a> <div class="abstract-cropped inline"> Monitoring fungicide residues in orange fruits is vital, as fungicides for orange cultivation are increasingly used to prevent yield loss. At the same time, increasing restrictions are added by regulatory organizations. For facile on-site monitoring of the fungicide carbendazim (MBC), five ion-selective potentiometric <a href="#" data-counterslink = "https://www.mdpi.com/2227-9040/12/12/246/more" onclick="$(this).parents('.abstract-cropped').toggleClass('inline').next('.abstract-full').toggleClass('inline'); return false;"> [...] Read more.</a> </div> <div class="abstract-full "> Monitoring fungicide residues in orange fruits is vital, as fungicides for orange cultivation are increasingly used to prevent yield loss. At the same time, increasing restrictions are added by regulatory organizations. For facile on-site monitoring of the fungicide carbendazim (MBC), five ion-selective potentiometric sensors are proposed and compared. The first two sensors were prepared with a precipitation-based technique using molybdate (sensor 1) and tetraphenylborate (TPB) (sensor 2), respectively. Furthermore, two ionophore-based sensors were prepared using β-cyclodextrin as ionophore together with TPB (sensor 3) and tetrakis(4-chlorophenyl)borate (TpClPB) (sensor 4) as ion-exchanger. Further incorporation of multi-walled carbon nanotubes (MWCNTs) between the graphite rod and the sensing membrane of sensor 4 (sensor 5) further improved the stability and significantly lowered the limit of detection (LOD). Their performance was evaluated according to IUPAC recommendations, revealing linear response in the concentration range 1 × 10<sup>−4</sup>–1 × 10<sup>−2</sup> M, 1 × 10<sup>−5</sup>–1 × 10<sup>−2</sup> M, 1 × 10<sup>−5</sup>–1 × 10<sup>−3</sup> M, 1 × 10<sup>−6</sup>–1 × 10<sup>−3</sup> M, and 1 × 10<sup>−7</sup>–1 × 10<sup>−3</sup> M with a Nernstian slope of 54.56, 55.48, 56.00, 56.85, and 57.34 mV/decade, respectively. The LOD values for the five sensors were found to be 7.92 × 10<sup>−5</sup>, 9.98 × 10<sup>−6</sup>, 9.72 × 10<sup>−6</sup>, 9.61 × 10<sup>−7</sup>, and 9.57 × 10<sup>−8</sup> M, respectively. The developed potentiometric sensors were successfully applied to determine the residue and degradation rate of MBC in orange samples. After the researched fungicide was applied to the orange trees, the preharvest interval (PHI) could be calculated based on the MBC degradation kinetics determined in the tested orange samples. <a href="/2227-9040/12/12/246">Full article</a> </div> </div> <div class="belongsTo" style="margin-bottom: 10px;"> (This article belongs to the Special Issue <a href=" /journal/chemosensors/special_issues/C6NWU06KJ3 ">Low-Cost Chemosenors for Applications in Environment, Health, Food, and Industry Process Control</a>)<br/> </div> </div> </div> <div class="generic-item article-item"> <input class="article-list-checkbox export-element" type="checkbox" name="articles_ids[]" value="1527204" data-select-all-name="article-listing"> <div class="article-content"> <div class="label right label__btn"> <span style="font-size: 12px; color: #1a1a1a;"> 15 pages, 3476 KiB   </span> <a href="/2227-9040/12/12/245/pdf?version=1732281179" class="UD_Listings_ArticlePDF" title="Article PDF" data-name="Flexible Humidity Sensor Based on Chemically Reduced Graphene Oxide" data-journal="chemosensors"> <i class="material-icons custom-download"></i> </a> </div> <div class="article-icons"><span class="label openaccess" data-dropdown="drop-article-label-openaccess" aria-expanded="false">Open Access</span><span class="label articletype">Article</span></div> <a class="title-link" href="/2227-9040/12/12/245">Flexible Humidity Sensor Based on Chemically Reduced Graphene Oxide</a> <div class="authors"> by <span class="inlineblock "><strong>Anna Maria Laera</strong>, </span><span class="inlineblock "><strong>Gennaro Cassano</strong>, </span><span class="inlineblock "><strong>Emiliano Burresi</strong>, </span><span class="inlineblock "><strong>Maria Lucia Protopapa</strong> and </span><span class="inlineblock "><strong>Michele Penza</strong></span> </div> <div class="color-grey-dark"> <em>Chemosensors</em> <b>2024</b>, <em>12</em>(12), 245; <a href="https://doi.org/10.3390/chemosensors12120245">https://doi.org/10.3390/chemosensors12120245</a> - 22 Nov 2024 </div> Viewed by 321 <div class="abstract-div"> <a href="#" onclick="$(this).next('.abstract-cropped').toggleClass('inline').next('.abstract-full').toggleClass('inline'); return false;"> <strong>Abstract </strong> </a> <div class="abstract-cropped inline"> The accurate measurement of moisture content in pure gases and in gas mixtures, such as air, has great relevance in many industrial processes. In the present study, graphene oxide reduced through a mild alkaline treatment was used as a humidity sensing material to <a href="#" data-counterslink = "https://www.mdpi.com/2227-9040/12/12/245/more" onclick="$(this).parents('.abstract-cropped').toggleClass('inline').next('.abstract-full').toggleClass('inline'); return false;"> [...] Read more.</a> </div> <div class="abstract-full "> The accurate measurement of moisture content in pure gases and in gas mixtures, such as air, has great relevance in many industrial processes. In the present study, graphene oxide reduced through a mild alkaline treatment was used as a humidity sensing material to fabricate a flexible chemiresistive device operating at room temperature. The active layer was deposited by solution casting on a substrate of bimatted polyester, previously coated with inkjet-printed interdigitated electrodes made of silver. Structural investigations were performed by means of X-ray diffraction, Raman spectroscopy, and FTIR spectroscopy, while the optical properties were investigated using UV-VIS absorption and photoluminescence excitation spectroscopy. With increasing relative hu-midity from 0 to 80%, the electrical resistance decreased from about 1.4 GΩ to 2.5 MΩ. The ex-traordinarily large range of resistance values highlights the ultrahigh humidity sensitivity of re-duced graphene oxide, which acquires a fair amount of electrical conductivity after physisorption of water molecules but results in a highly resistive material in dry air. The high sensitivity at room temperature, the response’s repeatability, the wide relative humidity range detected, and the fast response time are the main advantages of the proposed humidity sensor, while the presence of some hysteresis, mainly at low relative humidity, and the recovery time need further improve-ment. Finally, the sensing mechanisms are briefly discussed. <a href="/2227-9040/12/12/245">Full article</a> </div> </div> <div class="belongsTo" style="margin-bottom: 10px;"> (This article belongs to the Special Issue <a href=" /journal/chemosensors/special_issues/25UQ41218W ">Functional Nanomaterial-Based Gas Sensors and Humidity Sensors</a>)<br/> </div> <a href="#" class="abstract-figures-show" data-counterslink = "https://www.mdpi.com/2227-9040/12/12/245/show" ><span >►</span><span style=" display: none;">▼</span> Show Figures </a><div class="abstract-image-preview "><div class="arrow left-arrow" id="prev1527204"><i class="fa fa-caret-left"></i></div><div class="arrow right-arrow" id="next1527204"><i class="fa fa-caret-right"></i></div><div class="absgraph cycle-slideshow manual" data-cycle-fx="scrollHorz" data-cycle-timeout="0" data-cycle-next="#next1527204" data-cycle-prev="#prev1527204" data-cycle-progressive="#images1527204" data-cycle-slides=">div" data-cycle-log="false"><div class='openpopupgallery cycle-slide' data-imgindex='0' data-target='article-1527204-popup'><span class="helper"></span><img src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=" data-src="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00245/article_deploy/html/images/chemosensors-12-00245-g001-550.jpg?1732281275" alt="" style="border: 0;"><p>Figure 1</p></div><script id="images1527204" type="text/cycle" data-cycle-split="---"><div class='openpopupgallery' data-imgindex='1' data-target='article-1527204-popup'><span class="helper"></span><img src='https://pub.mdpi-res.com/chemosensors/chemosensors-12-00245/article_deploy/html/images/chemosensors-12-00245-g002-550.jpg?1732281276'><p>Figure 2</p></div> --- <div class='openpopupgallery' data-imgindex='2' data-target='article-1527204-popup'><span class="helper"></span><img src='https://pub.mdpi-res.com/chemosensors/chemosensors-12-00245/article_deploy/html/images/chemosensors-12-00245-g003-550.jpg?1732281277'><p>Figure 3</p></div> --- <div class='openpopupgallery' data-imgindex='3' data-target='article-1527204-popup'><span class="helper"></span><img src='https://pub.mdpi-res.com/chemosensors/chemosensors-12-00245/article_deploy/html/images/chemosensors-12-00245-g004-550.jpg?1732281278'><p>Figure 4</p></div> --- <div class='openpopupgallery' data-imgindex='4' data-target='article-1527204-popup'><span class="helper"></span><img src='https://pub.mdpi-res.com/chemosensors/chemosensors-12-00245/article_deploy/html/images/chemosensors-12-00245-g005-550.jpg?1732281279'><p>Figure 5</p></div> --- <div class='openpopupgallery' data-imgindex='5' data-target='article-1527204-popup'><span class="helper"></span><img src='https://pub.mdpi-res.com/chemosensors/chemosensors-12-00245/article_deploy/html/images/chemosensors-12-00245-g006-550.jpg?1732281281'><p>Figure 6</p></div> --- <div class='openpopupgallery' data-imgindex='6' data-target='article-1527204-popup'><span class="helper"></span><img src='https://pub.mdpi-res.com/chemosensors/chemosensors-12-00245/article_deploy/html/images/chemosensors-12-00245-g007-550.jpg?1732281282'><p>Figure 7</p></div> --- <div class='openpopupgallery' data-imgindex='7' data-target='article-1527204-popup'><span class="helper"></span><img src='https://pub.mdpi-res.com/chemosensors/chemosensors-12-00245/article_deploy/html/images/chemosensors-12-00245-g008-550.jpg?1732281283'><p>Figure 8</p></div> --- <div class='openpopupgallery' data-imgindex='8' data-target='article-1527204-popup'><span class="helper"></span><img src='https://pub.mdpi-res.com/chemosensors/chemosensors-12-00245/article_deploy/html/images/chemosensors-12-00245-g009-550.jpg?1732281284'><p>Figure 9</p></div> --- <div class='openpopupgallery' data-imgindex='9' data-target='article-1527204-popup'><span class="helper"></span><img src='https://pub.mdpi-res.com/chemosensors/chemosensors-12-00245/article_deploy/html/images/chemosensors-12-00245-g010-550.jpg?1732281286'><p>Figure 10</p></div></script></div></div><div id="article-1527204-popup" class="popupgallery" style="display: inline; line-height: 200%"><a href="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00245/article_deploy/html/images/chemosensors-12-00245-g001-550.jpg?1732281275" title=" <strong>Figure 1</strong><br/> <p>Schematic of measurement setup.</p> <strong style='display: block; margin-top: 10px; font-size: 18px;'><a style='color: #fff' href='/2227-9040/12/12/245'>Full article</a></strong> "></a><a href="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00245/article_deploy/html/images/chemosensors-12-00245-g002-550.jpg?1732281276" title=" <strong>Figure 2</strong><br/> <p>FTIR spectra of GO (<b>a</b>) and rGO (<b>b</b>) obtained in alkali solution. Raman spectra of GO (<b>c</b>) and rGO (<b>d</b>) obtained in alkali solution.</p> <strong style='display: block; margin-top: 10px; font-size: 18px;'><a style='color: #fff' href='/2227-9040/12/12/245'>Full article</a></strong> "></a><a href="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00245/article_deploy/html/images/chemosensors-12-00245-g003-550.jpg?1732281277" title=" <strong>Figure 3</strong><br/> <p>UV-Vis absorption spectra (<b>a</b>) and PL spectra (<b>b</b>) of GO and rGO in water solutions.</p> <strong style='display: block; margin-top: 10px; font-size: 18px;'><a style='color: #fff' href='/2227-9040/12/12/245'>Full article</a></strong> "></a><a href="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00245/article_deploy/html/images/chemosensors-12-00245-g004-550.jpg?1732281278" title=" <strong>Figure 4</strong><br/> <p>XRD pattern of the rGO sample.</p> <strong style='display: block; margin-top: 10px; font-size: 18px;'><a style='color: #fff' href='/2227-9040/12/12/245'>Full article</a></strong> "></a><a href="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00245/article_deploy/html/images/chemosensors-12-00245-g005-550.jpg?1732281279" title=" <strong>Figure 5</strong><br/> <p>Sensor signals upon exposure to several decreasing %RH values at room temperature.</p> <strong style='display: block; margin-top: 10px; font-size: 18px;'><a style='color: #fff' href='/2227-9040/12/12/245'>Full article</a></strong> "></a><a href="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00245/article_deploy/html/images/chemosensors-12-00245-g006-550.jpg?1732281281" title=" <strong>Figure 6</strong><br/> <p>Sensor responses SR% (<b>a</b>) and sensor sensitivity S (<b>b</b>) versus increasing %RH.</p> <strong style='display: block; margin-top: 10px; font-size: 18px;'><a style='color: #fff' href='/2227-9040/12/12/245'>Full article</a></strong> "></a><a href="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00245/article_deploy/html/images/chemosensors-12-00245-g007-550.jpg?1732281282" title=" <strong>Figure 7</strong><br/> <p>Stepwise diagram of sensor resistance versus time upon exposure to several decreasing %RH values within the range 80.9–50.0% (<b>a</b>) and 50.0–0% (<b>b</b>) and upon exposure to several increasing %RH values within the range 0–46.9% (<b>c</b>) and 46.9–80.9% (<b>d</b>).</p> <strong style='display: block; margin-top: 10px; font-size: 18px;'><a style='color: #fff' href='/2227-9040/12/12/245'>Full article</a></strong> "></a><a href="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00245/article_deploy/html/images/chemosensors-12-00245-g008-550.jpg?1732281283" title=" <strong>Figure 8</strong><br/> <p>Response and recovery time evaluated for exposure at 61.0% RH (<b>a</b>) and hysteresis curve (<b>b</b>).</p> <strong style='display: block; margin-top: 10px; font-size: 18px;'><a style='color: #fff' href='/2227-9040/12/12/245'>Full article</a></strong> "></a><a href="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00245/article_deploy/html/images/chemosensors-12-00245-g009-550.jpg?1732281284" title=" <strong>Figure 9</strong><br/> <p>Six repeated cycles of sensor device exposed to 6% RH and 60% RH at room temperature.</p> <strong style='display: block; margin-top: 10px; font-size: 18px;'><a style='color: #fff' href='/2227-9040/12/12/245'>Full article</a></strong> "></a><a href="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00245/article_deploy/html/images/chemosensors-12-00245-g010-550.jpg?1732281286" title=" <strong>Figure 10</strong><br/> <p>Sensor signals upon exposure to several concentrations of ethanol, isopropanol, ethyl acetate, ethyl ether and petroleum ether at 50% RH and room temperature.</p> <strong style='display: block; margin-top: 10px; font-size: 18px;'><a style='color: #fff' href='/2227-9040/12/12/245'>Full article</a></strong> "></a></div> </div> </div> <div class="generic-item article-item"> <input class="article-list-checkbox export-element" type="checkbox" name="articles_ids[]" value="1526655" data-select-all-name="article-listing"> <div class="article-content"> <div class="label right label__btn"> <span style="font-size: 12px; color: #1a1a1a;"> 24 pages, 7104 KiB   </span> <a href="/2227-9040/12/12/244/pdf?version=1732260466" class="UD_Listings_ArticlePDF" title="Article PDF" data-name="Recent Advances in Metal Oxide Semiconductor Heterojunctions for the Detection of Volatile Organic Compounds" data-journal="chemosensors"> <i class="material-icons custom-download"></i> </a> </div> <div class="article-icons"><span class="label openaccess" data-dropdown="drop-article-label-openaccess" aria-expanded="false">Open Access</span><span class="label articletype">Review</span></div> <a class="title-link" href="/2227-9040/12/12/244">Recent Advances in Metal Oxide Semiconductor Heterojunctions for the Detection of Volatile Organic Compounds</a> <div class="authors"> by <span class="inlineblock "><strong>Shengming Zhang</strong>, </span><span class="inlineblock "><strong>Heng Zhang</strong>, </span><span class="inlineblock "><strong>Haiyu Yao</strong>, </span><span class="inlineblock "><strong>Peijie Wang</strong>, </span><span class="inlineblock "><strong>Min Zhu</strong>, </span><span class="inlineblock "><strong>Xuerong Shi</strong> and </span><span class="inlineblock "><strong>Shusheng Xu</strong></span> </div> <div class="color-grey-dark"> <em>Chemosensors</em> <b>2024</b>, <em>12</em>(12), 244; <a href="https://doi.org/10.3390/chemosensors12120244">https://doi.org/10.3390/chemosensors12120244</a> - 22 Nov 2024 </div> Viewed by 432 <div class="abstract-div"> <a href="#" onclick="$(this).next('.abstract-cropped').toggleClass('inline').next('.abstract-full').toggleClass('inline'); return false;"> <strong>Abstract </strong> </a> <div class="abstract-cropped inline"> The efficient detection of volatile organic compounds (VOCs) is critically important in the domains of environmental protection, healthcare, and industrial safety. The development of metal oxide semiconductor (MOS) heterojunction gas-sensing materials is considered one of the most effective strategies to enhance sensor performance. <a href="#" data-counterslink = "https://www.mdpi.com/2227-9040/12/12/244/more" onclick="$(this).parents('.abstract-cropped').toggleClass('inline').next('.abstract-full').toggleClass('inline'); return false;"> [...] Read more.</a> </div> <div class="abstract-full "> The efficient detection of volatile organic compounds (VOCs) is critically important in the domains of environmental protection, healthcare, and industrial safety. The development of metal oxide semiconductor (MOS) heterojunction gas-sensing materials is considered one of the most effective strategies to enhance sensor performance. This review summarizes and discusses the types of heterojunctions and their working principles, enhancement strategies, preparation methodologies, and applications in acetone and ethanol detection. To address the constraints pertaining to low sensitivity, sluggish response/recovery times, and elevated operating temperatures that are inherent in VOC sensors, several improvement methods are proposed, including doping with metals like Ag and Pd, incorporating additives such as MXene and polyoxometalates, optimizing morphologies through a fine design, and self-doping via oxygen vacancies. Furthermore, this work provides insights into the challenges faced by MOSs heterojunction-based gas sensors and outlines future research directions in this field. This review will contribute to foundational theories to overcome existing bottlenecks in MOS heterojunction technology while promoting its large-scale application in disease screening or agricultural food quality assessments. <a href="/2227-9040/12/12/244">Full article</a> </div> </div> <div class="belongsTo" style="margin-bottom: 10px;"> (This article belongs to the Special Issue <a href=" /journal/chemosensors/special_issues/25UQ41218W ">Functional Nanomaterial-Based Gas Sensors and Humidity Sensors</a>)<br/> </div> <a href="#" class="abstract-figures-show" data-counterslink = "https://www.mdpi.com/2227-9040/12/12/244/show" ><span >►</span><span style=" display: none;">▼</span> Show Figures </a><div class="abstract-image-preview "><div class="arrow left-arrow" id="prev1526655"><i class="fa fa-caret-left"></i></div><div class="arrow right-arrow" id="next1526655"><i class="fa fa-caret-right"></i></div><div class="absgraph cycle-slideshow manual" data-cycle-fx="scrollHorz" data-cycle-timeout="0" data-cycle-next="#next1526655" data-cycle-prev="#prev1526655" data-cycle-progressive="#images1526655" data-cycle-slides=">div" data-cycle-log="false"><div class='openpopupgallery cycle-slide' data-imgindex='0' data-target='article-1526655-popup'><span class="helper"></span><img src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=" data-src="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00244/article_deploy/html/images/chemosensors-12-00244-g001-550.jpg?1732260588" alt="" style="border: 0;"><p>Figure 1</p></div><script id="images1526655" type="text/cycle" data-cycle-split="---"><div class='openpopupgallery' data-imgindex='1' data-target='article-1526655-popup'><span class="helper"></span><img src='https://pub.mdpi-res.com/chemosensors/chemosensors-12-00244/article_deploy/html/images/chemosensors-12-00244-g002-550.jpg?1732260589'><p>Figure 2</p></div> --- <div class='openpopupgallery' data-imgindex='2' data-target='article-1526655-popup'><span class="helper"></span><img src='https://pub.mdpi-res.com/chemosensors/chemosensors-12-00244/article_deploy/html/images/chemosensors-12-00244-g003-550.jpg?1732260590'><p>Figure 3</p></div> --- <div class='openpopupgallery' data-imgindex='3' data-target='article-1526655-popup'><span class="helper"></span><img src='https://pub.mdpi-res.com/chemosensors/chemosensors-12-00244/article_deploy/html/images/chemosensors-12-00244-g004-550.jpg?1732260591'><p>Figure 4</p></div> --- <div class='openpopupgallery' data-imgindex='4' data-target='article-1526655-popup'><span class="helper"></span><img src='https://pub.mdpi-res.com/chemosensors/chemosensors-12-00244/article_deploy/html/images/chemosensors-12-00244-g005-550.jpg?1732260591'><p>Figure 5</p></div> --- <div class='openpopupgallery' data-imgindex='5' data-target='article-1526655-popup'><span class="helper"></span><img src='https://pub.mdpi-res.com/chemosensors/chemosensors-12-00244/article_deploy/html/images/chemosensors-12-00244-g006-550.jpg?1732260594'><p>Figure 6</p></div> --- <div class='openpopupgallery' data-imgindex='6' data-target='article-1526655-popup'><span class="helper"></span><img src='https://pub.mdpi-res.com/chemosensors/chemosensors-12-00244/article_deploy/html/images/chemosensors-12-00244-g007-550.jpg?1732260596'><p>Figure 7</p></div> --- <div class='openpopupgallery' data-imgindex='7' data-target='article-1526655-popup'><span class="helper"></span><img src='https://pub.mdpi-res.com/chemosensors/chemosensors-12-00244/article_deploy/html/images/chemosensors-12-00244-g008-550.jpg?1732260598'><p>Figure 8</p></div> --- <div class='openpopupgallery' data-imgindex='8' data-target='article-1526655-popup'><span class="helper"></span><img src='https://pub.mdpi-res.com/chemosensors/chemosensors-12-00244/article_deploy/html/images/chemosensors-12-00244-g009-550.jpg?1732260600'><p>Figure 9</p></div> --- <div class='openpopupgallery' data-imgindex='9' data-target='article-1526655-popup'><span class="helper"></span><img src='https://pub.mdpi-res.com/chemosensors/chemosensors-12-00244/article_deploy/html/images/chemosensors-12-00244-g010-550.jpg?1732260602'><p>Figure 10</p></div> --- <div class='openpopupgallery' data-imgindex='10' data-target='article-1526655-popup'><span class="helper"></span><img src='https://pub.mdpi-res.com/chemosensors/chemosensors-12-00244/article_deploy/html/images/chemosensors-12-00244-g011-550.jpg?1732260604'><p>Figure 11</p></div> --- <div class='openpopupgallery' data-imgindex='11' data-target='article-1526655-popup'><span class="helper"></span><img src='https://pub.mdpi-res.com/chemosensors/chemosensors-12-00244/article_deploy/html/images/chemosensors-12-00244-g012-550.jpg?1732260606'><p>Figure 12</p></div> --- <div class='openpopupgallery' data-imgindex='12' data-target='article-1526655-popup'><span class="helper"></span><img src='https://pub.mdpi-res.com/chemosensors/chemosensors-12-00244/article_deploy/html/images/chemosensors-12-00244-g013-550.jpg?1732260608'><p>Figure 13</p></div></script></div></div><div id="article-1526655-popup" class="popupgallery" style="display: inline; line-height: 200%"><a href="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00244/article_deploy/html/images/chemosensors-12-00244-g001-550.jpg?1732260588" title=" <strong>Figure 1</strong><br/> <p>Illustration of three types of heterojunction.</p> <strong style='display: block; margin-top: 10px; font-size: 18px;'><a style='color: #fff' href='/2227-9040/12/12/244'>Full article</a></strong> "></a><a href="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00244/article_deploy/html/images/chemosensors-12-00244-g002-550.jpg?1732260589" title=" <strong>Figure 2</strong><br/> <p>Illustration of strategies for promoting the sensing performance of MOS heterojunctions.</p> <strong style='display: block; margin-top: 10px; font-size: 18px;'><a style='color: #fff' href='/2227-9040/12/12/244'>Full article</a></strong> "></a><a href="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00244/article_deploy/html/images/chemosensors-12-00244-g003-550.jpg?1732260590" title=" <strong>Figure 3</strong><br/> <p>Illustrations of preparation methods for MOSs heterojunction materials.</p> <strong style='display: block; margin-top: 10px; font-size: 18px;'><a style='color: #fff' href='/2227-9040/12/12/244'>Full article</a></strong> "></a><a href="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00244/article_deploy/html/images/chemosensors-12-00244-g004-550.jpg?1732260591" title=" <strong>Figure 4</strong><br/> <p>(<b>a</b>) The TEM image of hierarchical Fe<sub>2</sub>O<sub>3</sub>-Co<sub>3</sub>O<sub>4</sub> heterojunction; (<b>b</b>) the contents of oxygen species based on the analysis of X-ray photoelectron spectroscopy (XPS); (<b>c</b>) the dynamic dot-line pattern of three sensors; (<b>d</b>) the selectivity of all gas sensors’ exposure to 100 ppm of different gases [<a href="#B86-chemosensors-12-00244" class="html-bibr">86</a>]. Reprinted with permission from Elsevier, copyright 2024.</p> <strong style='display: block; margin-top: 10px; font-size: 18px;'><a style='color: #fff' href='/2227-9040/12/12/244'>Full article</a></strong> "></a><a href="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00244/article_deploy/html/images/chemosensors-12-00244-g005-550.jpg?1732260591" title=" <strong>Figure 5</strong><br/> <p>Schematic illustration of the synthetic process of the ZIF-67-derived oxide cage/nanofiber Co<sub>3</sub>O<sub>4</sub>/In<sub>2</sub>O<sub>3</sub> heterostructure for acetone gas sensing [<a href="#B55-chemosensors-12-00244" class="html-bibr">55</a>]. Reprinted with permission from [<a href="#B56-chemosensors-12-00244" class="html-bibr">56</a>]. Copyright {2024} American Chemical Society.</p> <strong style='display: block; margin-top: 10px; font-size: 18px;'><a style='color: #fff' href='/2227-9040/12/12/244'>Full article</a></strong> "></a><a href="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00244/article_deploy/html/images/chemosensors-12-00244-g006-550.jpg?1732260594" title=" <strong>Figure 6</strong><br/> <p>(<b>a</b>) Illustration of the preparation process for the Ag-NiO/SnO<sub>2</sub> nanotubes (NTs); (<b>b</b>) scanning electron microscope (SEM) image; (<b>c</b>) transmission electron microscope (TEM) image; and (<b>d</b>) the diagram of the energy band structure of the Ag-NiO/SnO<sub>2</sub> NTs [<a href="#B87-chemosensors-12-00244" class="html-bibr">87</a>]. Reprinted with permission from Elsevier, copyright 2024. (<b>e</b>) Synthetic scheme of ZnO-CuO core–hollow cube nanostructures [<a href="#B90-chemosensors-12-00244" class="html-bibr">90</a>]. Reprinted with permission from [<a href="#B91-chemosensors-12-00244" class="html-bibr">91</a>]. Copyright {2020} American Chemical Society.</p> <strong style='display: block; margin-top: 10px; font-size: 18px;'><a style='color: #fff' href='/2227-9040/12/12/244'>Full article</a></strong> "></a><a href="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00244/article_deploy/html/images/chemosensors-12-00244-g007-550.jpg?1732260596" title=" <strong>Figure 7</strong><br/> <p>(<b>a</b>) Preparation of the p-type CuO/TiO<sub>2</sub>/MXene gas-sensitive sensor; (<b>b</b>) energy band diagram of the gas-sensitive sensor in four different situations [<a href="#B102-chemosensors-12-00244" class="html-bibr">102</a>]. Reprinted with permission from [<a href="#B104-chemosensors-12-00244" class="html-bibr">104</a>]. Copyright {2024} American Chemical Society.</p> <strong style='display: block; margin-top: 10px; font-size: 18px;'><a style='color: #fff' href='/2227-9040/12/12/244'>Full article</a></strong> "></a><a href="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00244/article_deploy/html/images/chemosensors-12-00244-g008-550.jpg?1732260598" title=" <strong>Figure 8</strong><br/> <p>(<b>a</b>) Schematic illustration of the formation process of the 3% Fe<sub>2</sub>O<sub>3</sub>-loaded ultrathin nanosheet assembled hollowed-out hierarchical NiO nanorods (Fe<sub>2</sub>O<sub>3</sub>@NiO); (<b>b</b>) SEM and TEM images of Fe<sub>2</sub>O<sub>3</sub>@NiO; (<b>c</b>) response of the Fe<sub>2</sub>O<sub>3</sub>@NiO to 10 ppm ethanol at different operating temperatures and 80% RH; (<b>d</b>) response of the Fe<sub>2</sub>O<sub>3</sub>@NiO at 150 °C to 10 ppm of different target gases under different humidity conditions [<a href="#B98-chemosensors-12-00244" class="html-bibr">98</a>]. Reprinted with permission from [<a href="#B99-chemosensors-12-00244" class="html-bibr">99</a>]. Copyright {2023} American Chemical Society.</p> <strong style='display: block; margin-top: 10px; font-size: 18px;'><a style='color: #fff' href='/2227-9040/12/12/244'>Full article</a></strong> "></a><a href="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00244/article_deploy/html/images/chemosensors-12-00244-g009-550.jpg?1732260600" title=" <strong>Figure 9</strong><br/> <p>(<b>a</b>) The schematic illustration of the construction and engineering of SnO<sub>2</sub>-ZnO based on MOF precursor and corresponding TEM and HRTEM images [<a href="#B115-chemosensors-12-00244" class="html-bibr">115</a>]. Reprinted with permission from Elsevier, copyright 2023.; (<b>b</b>) SEM image of ZnO-SnO<sub>2</sub> heterojunction IOPBs; and (<b>c</b>) the response at 260 °C to 10, 20, 50, 80, and 100 ppm acetone [<a href="#B69-chemosensors-12-00244" class="html-bibr">69</a>]. Reprinted with permission from Elsevier, copyright 2024.</p> <strong style='display: block; margin-top: 10px; font-size: 18px;'><a style='color: #fff' href='/2227-9040/12/12/244'>Full article</a></strong> "></a><a href="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00244/article_deploy/html/images/chemosensors-12-00244-g010-550.jpg?1732260602" title=" <strong>Figure 10</strong><br/> <p>Schematic diagram of gas molecular adsorption, electron transfer, and energy band structure for the In<sub>2</sub>O<sub>3</sub>-ZnO material in (<b>a</b>) air and (<b>b</b>) ethanol [<a href="#B50-chemosensors-12-00244" class="html-bibr">50</a>]. Reprinted with permission from Elsevier, copyright 2023.</p> <strong style='display: block; margin-top: 10px; font-size: 18px;'><a style='color: #fff' href='/2227-9040/12/12/244'>Full article</a></strong> "></a><a href="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00244/article_deploy/html/images/chemosensors-12-00244-g011-550.jpg?1732260604" title=" <strong>Figure 11</strong><br/> <p>(<b>a</b>) SEM image of Zn<sub>2</sub>SnO<sub>4</sub>/CdSnO<sub>3</sub>; (<b>b</b>) EPR spectra of CdSnO<sub>3</sub>, Zn<sub>2</sub>SnO<sub>4</sub>, and Zn<sub>2</sub>SnO<sub>4</sub>/CdSnO<sub>3</sub>; (<b>c</b>) schematic diagram of the energy band structure and ethanol gas sensing process of CdSnO<sub>3</sub>/Zn<sub>2</sub>SnO<sub>4</sub> heterostructure [<a href="#B57-chemosensors-12-00244" class="html-bibr">57</a>]. Reprinted with permission from Elsevier, copyright 2024.</p> <strong style='display: block; margin-top: 10px; font-size: 18px;'><a style='color: #fff' href='/2227-9040/12/12/244'>Full article</a></strong> "></a><a href="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00244/article_deploy/html/images/chemosensors-12-00244-g012-550.jpg?1732260606" title=" <strong>Figure 12</strong><br/> <p>(<b>a</b>) Schematic illustration of the fabrication process of In<sub>2</sub>O<sub>3</sub>@PW<sub>12</sub>@SnO<sub>2</sub> NFs [<a href="#B97-chemosensors-12-00244" class="html-bibr">97</a>]; (<b>b</b>) TEM image of In@3%P@Sn NFs after calcination and selectivity pattern of the gas sensors based on In@3%P@Sn [<a href="#B97-chemosensors-12-00244" class="html-bibr">97</a>]; (<b>c</b>) transient responses of different concentrations of ethanol at the optimal operating temperature [<a href="#B97-chemosensors-12-00244" class="html-bibr">97</a>]. Reprinted with permission from Elsevier, copyright 2024.</p> <strong style='display: block; margin-top: 10px; font-size: 18px;'><a style='color: #fff' href='/2227-9040/12/12/244'>Full article</a></strong> "></a><a href="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00244/article_deploy/html/images/chemosensors-12-00244-g013-550.jpg?1732260608" title=" <strong>Figure 13</strong><br/> <p>(<b>a</b>) Formation process schematic for SnO<sub>2</sub>/ZnO/Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub> MXene nanocomposites; (<b>b</b>) the curves for dynamic response and recovery of SnO<sub>2</sub>/ZnO/Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub> MXene at 120 °C to 100 ppm ethanol [<a href="#B103-chemosensors-12-00244" class="html-bibr">103</a>]; (<b>c</b>) SnO<sub>2</sub>/ZnO/Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub> MXene responses to various gases (100 ppm) at 120 °C [<a href="#B103-chemosensors-12-00244" class="html-bibr">103</a>]; (<b>d</b>) electron transfer of ZnO, SnO<sub>2</sub>, and Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub> MXene in air and ethanol [<a href="#B103-chemosensors-12-00244" class="html-bibr">103</a>]. Reprinted with permission from Elsevier, copyright 2024.</p> <strong style='display: block; margin-top: 10px; font-size: 18px;'><a style='color: #fff' href='/2227-9040/12/12/244'>Full article</a></strong> "></a></div> </div> </div> <div class="generic-item article-item"> <input class="article-list-checkbox export-element" type="checkbox" name="articles_ids[]" value="1525274" data-select-all-name="article-listing"> <div class="article-content"> <div class="label right label__btn"> <span style="font-size: 12px; color: #1a1a1a;"> 12 pages, 2266 KiB   </span> <a href="/2227-9040/12/11/243/pdf?version=1732265602" class="UD_Listings_ArticlePDF" title="Article PDF" data-name="A Nanodiamond-Based Electrochemical Sensor for the Determination of Paracetamol in Pharmaceutical Samples" data-journal="chemosensors"> <i class="material-icons custom-download"></i> </a> </div> <div class="article-icons"><span class="label openaccess" data-dropdown="drop-article-label-openaccess" aria-expanded="false">Open Access</span><span class="label articletype">Article</span></div> <a class="title-link" href="/2227-9040/12/11/243">A Nanodiamond-Based Electrochemical Sensor for the Determination of Paracetamol in Pharmaceutical Samples</a> <div class="authors"> by <span class="inlineblock "><strong>Déborah de Oliveira Lopes</strong>, </span><span class="inlineblock "><strong>Felipe Magalhães Marinho</strong>, </span><span class="inlineblock "><strong>Patricia Batista Deroco</strong>, </span><span class="inlineblock "><strong>Amanda Neumann</strong>, </span><span class="inlineblock "><strong>Jessica Rocha Camargo</strong>, </span><span class="inlineblock "><strong>Rafaela Cristina de Freitas</strong>, </span><span class="inlineblock "><strong>Lucas Ventosa Bertolim</strong>, </span><span class="inlineblock "><strong>Orlando Fatibello Filho</strong>, </span><span class="inlineblock "><strong>Bruno Campos Janegitz</strong> and </span><span class="inlineblock "><strong>Geiser Gabriel de Oliveira</strong></span> </div> <div class="color-grey-dark"> <em>Chemosensors</em> <b>2024</b>, <em>12</em>(11), 243; <a href="https://doi.org/10.3390/chemosensors12110243">https://doi.org/10.3390/chemosensors12110243</a> - 20 Nov 2024 </div> Viewed by 466 <div class="abstract-div"> <a href="#" onclick="$(this).next('.abstract-cropped').toggleClass('inline').next('.abstract-full').toggleClass('inline'); return false;"> <strong>Abstract </strong> </a> <div class="abstract-cropped inline"> This study presents an electrochemical sensor developed from a glassy carbon electrode modified with nanodiamond film (ND/GCE). This electrochemical response of the proposed sensor was improved, and it showed excellent analytical performance for the detection of paracetamol (PAR), which was attributed to the <a href="#" data-counterslink = "https://www.mdpi.com/2227-9040/12/11/243/more" onclick="$(this).parents('.abstract-cropped').toggleClass('inline').next('.abstract-full').toggleClass('inline'); return false;"> [...] Read more.</a> </div> <div class="abstract-full "> This study presents an electrochemical sensor developed from a glassy carbon electrode modified with nanodiamond film (ND/GCE). This electrochemical response of the proposed sensor was improved, and it showed excellent analytical performance for the detection of paracetamol (PAR), which was attributed to the high PAR charging capacity on the electrode surface and the excellent electrical conductivity of ND. Morphological and electrochemical characterizations of the sensor were performed via scanning electron microscopy (SEM) and cyclic voltammetry using a redox probe [Fe(CN)<sub>6</sub>]<sup>3−</sup>. The sensor was applied for the determination of PAR. Quantification was performed using square-wave voltammetry, and it showed a linear concentration range from 0.79 to 100 µmol L<sup>−1</sup>, with a limit of detection of 0.18 µmol L<sup>−1</sup>. The proposed sensor exhibited satisfactory repeatability and high sensitivity in the determination of the analyte of interest. The electrochemical sensor was also employed for the analysis of PAR in real samples, with recovery rates ranging between 96.4 and 98.7%. This sensor was successfully used for the determination of the drug in pharmaceutical samples. <a href="/2227-9040/12/11/243">Full article</a> </div> </div> <div class="belongsTo" style="margin-bottom: 10px;"> (This article belongs to the Special Issue <a href=" /journal/chemosensors/special_issues/93FLYIFSGN ">Carbon Nanomaterials and Related Materials for Sensing Applications, Volume II</a>)<br/> </div> <a href="#" class="abstract-figures-show" data-counterslink = "https://www.mdpi.com/2227-9040/12/11/243/show" ><span >►</span><span style=" display: none;">▼</span> Show Figures </a><div class="abstract-image-preview "><div class="arrow left-arrow" id="prev1525274"><i class="fa fa-caret-left"></i></div><div class="arrow right-arrow" id="next1525274"><i class="fa fa-caret-right"></i></div><div class="absgraph cycle-slideshow manual" data-cycle-fx="scrollHorz" data-cycle-timeout="0" data-cycle-next="#next1525274" data-cycle-prev="#prev1525274" data-cycle-progressive="#images1525274" data-cycle-slides=">div" data-cycle-log="false"><div class='openpopupgallery cycle-slide' data-imgindex='0' data-target='article-1525274-popup'><span class="helper"></span><img src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=" data-src="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00243/article_deploy/html/images/chemosensors-12-00243-ag-550.jpg?1732265748" alt="" style="border: 0;"><p>Graphical abstract</p></div><script id="images1525274" type="text/cycle" data-cycle-split="---"><div class='openpopupgallery' data-imgindex='1' data-target='article-1525274-popup'><span class="helper"></span><img src='https://pub.mdpi-res.com/chemosensors/chemosensors-12-00243/article_deploy/html/images/chemosensors-12-00243-g001-550.jpg?1732265739'><p>Figure 1</p></div> --- <div class='openpopupgallery' data-imgindex='2' data-target='article-1525274-popup'><span class="helper"></span><img src='https://pub.mdpi-res.com/chemosensors/chemosensors-12-00243/article_deploy/html/images/chemosensors-12-00243-g002-550.jpg?1732265743'><p>Figure 2</p></div> --- <div class='openpopupgallery' data-imgindex='3' data-target='article-1525274-popup'><span class="helper"></span><img src='https://pub.mdpi-res.com/chemosensors/chemosensors-12-00243/article_deploy/html/images/chemosensors-12-00243-g003-550.jpg?1732265745'><p>Figure 3</p></div> --- <div class='openpopupgallery' data-imgindex='4' data-target='article-1525274-popup'><span class="helper"></span><img src='https://pub.mdpi-res.com/chemosensors/chemosensors-12-00243/article_deploy/html/images/chemosensors-12-00243-g004-550.jpg?1732265747'><p>Figure 4</p></div> --- <div class='openpopupgallery' data-imgindex='5' data-target='article-1525274-popup'><span class="helper"></span><img src='https://pub.mdpi-res.com/chemosensors/chemosensors-12-00243/article_deploy/html/images/chemosensors-12-00243-g005-550.jpg?1732265748'><p>Figure 5</p></div></script></div></div><div id="article-1525274-popup" class="popupgallery" style="display: inline; line-height: 200%"><a href="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00243/article_deploy/html/images/chemosensors-12-00243-ag-550.jpg?1732265748" title=" <strong>Graphical abstract</strong><br/><strong style='display: block; margin-top: 10px; font-size: 18px;'><a style='color: #fff' href='/2227-9040/12/11/243'>Full article</a></strong> "></a><a href="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00243/article_deploy/html/images/chemosensors-12-00243-g001-550.jpg?1732265739" title=" <strong>Figure 1</strong><br/> <p>Scheme of ND/GCE preparation. The bare electrode was cleaned (step 1); the surface of the electrode was polished carefully using extra fine carborundum paper (step 2), and the polished electrode was sonicated in isopropyl alcohol for 1 min and then rinsed with water and then dried. Then, 1.0 mg of ND was suspended in 1.0 mL of ultrapure water, and the suspension was ultrasonically stirred for 30 min to achieve proper dispersion (step 3); 8.0 μL of the ND dispersion was deposited on the electrode surface using the drop-casting method, followed by drying at room temperature for 2 h to form the film (step 4). Finally, the ND/GCE was ready to use in PAR detection (Step 5).</p> <strong style='display: block; margin-top: 10px; font-size: 18px;'><a style='color: #fff' href='/2227-9040/12/11/243'>Full article</a></strong> "></a><a href="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00243/article_deploy/html/images/chemosensors-12-00243-g002-550.jpg?1732265743" title=" <strong>Figure 2</strong><br/> <p>SEM images obtained via ND surfaces with magnifications of (<b>A</b>) 2000× and (<b>B</b>) 4000×; (<b>C</b>) ColorSEM image of ND surfaces with a magnification of 2000×; (<b>D</b>) X-ray diffraction pattern of NDs, 2θ = 10 to 90°; (<b>E</b>) energy-dispersive X-ray spectroscopy (EDS) mapping for NDs and contact angle wettability for (<b>F</b>) GCE and (<b>G</b>) ND/GCE.</p> <strong style='display: block; margin-top: 10px; font-size: 18px;'><a style='color: #fff' href='/2227-9040/12/11/243'>Full article</a></strong> "></a><a href="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00243/article_deploy/html/images/chemosensors-12-00243-g003-550.jpg?1732265745" title=" <strong>Figure 3</strong><br/> <p>Cyclic voltammograms comparing GCE and ND/GCE in the presence of 9.9 × 10<sup>−4</sup> mol L<sup>−1</sup> [Fe(CN)<sub>6</sub>]<sup>3−</sup> in 0.1 mol L<sup>−1</sup> of KCl at a scan rate of = 50 mV s<sup>−1</sup> are shown in (<b>A</b>); (<b>B</b>) presents the Ip<sub>a</sub>/Ip<sub>c</sub> ratio and Δ<span class="html-italic">E</span><sub>p</sub> values for both GCE and ND/GCE electrodes; (<b>C</b>,<b>D</b>) cyclic voltammograms obtained for GCE and ND/GCE electrodes, respectively, in the presence of 9.9 × 10<sup>−4</sup> mol L<sup>−1</sup> [Fe(CN)<sub>6</sub>]<sup>3−</sup> in 0.1 mol L<sup>−1</sup> of KCl at scan rates ranging from 50 to 200 mV s<sup>−1</sup>. Insets: correlation I vs. ν<sup>1</sup>/<sup>2</sup>.</p> <strong style='display: block; margin-top: 10px; font-size: 18px;'><a style='color: #fff' href='/2227-9040/12/11/243'>Full article</a></strong> "></a><a href="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00243/article_deploy/html/images/chemosensors-12-00243-g004-550.jpg?1732265747" title=" <strong>Figure 4</strong><br/> <p>(<b>A</b>) Cyclic voltammograms obtained in the presence of 5.0 × 10<sup>−3</sup> mol L<sup>−1</sup> PAR in 0.1 mol L<sup>−1</sup> H<sub>2</sub>SO<sub>4</sub> at a scan rate of 50 mV s<sup>−1</sup>; (<b>B</b>) the suggested mechanism for PAR oxidation on ND/GCE; (<b>C</b>) SWV voltammograms were obtained for blank solution and 5.2 µmol L<sup>−1</sup> of PAR in 0.1 mol L<sup>−1</sup> H<sub>2</sub>SO<sub>4</sub> solution using the ND/GCE; analysis condition: <span class="html-italic">f</span> = 25 Hz, <span class="html-italic">a</span> = 20 mV and Δ<span class="html-italic">E</span><sub>s</sub> = 5 mV.</p> <strong style='display: block; margin-top: 10px; font-size: 18px;'><a style='color: #fff' href='/2227-9040/12/11/243'>Full article</a></strong> "></a><a href="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00243/article_deploy/html/images/chemosensors-12-00243-g005-550.jpg?1732265748" title=" <strong>Figure 5</strong><br/> <p>(<b>A</b>) SWV records were obtained for different PAR concentrations: (1) 0.0 (blank solution), and (2 to 13) 0.79, 2.31, 3.78, 5.2, 8.86, 12.5, 19.7, 26.7, 33.6, 69.1, 86.7, and 100 µmol L<sup>−1</sup> in 0.1 mol L<sup>−1</sup> of H<sub>2</sub>SO<sub>4</sub> solution using the ND/GCE. Analysis condition: <span class="html-italic">f</span> = 80 Hz, <span class="html-italic">a</span> = 40 mV, and Δ<span class="html-italic">E</span><sub>s</sub> = 6 mV. Inset: PAR concentrations in 0.0 (blank), 0.79, 2.31, and 3.78 µmol L<sup>−1</sup>. (<b>B</b>) Analytical curve (<span class="html-italic">I</span><sub>p</sub> versus C<sub>PAR</sub>).</p> <strong style='display: block; margin-top: 10px; font-size: 18px;'><a style='color: #fff' href='/2227-9040/12/11/243'>Full article</a></strong> "></a></div> </div> </div> <div class="generic-item article-item"> <input class="article-list-checkbox export-element" type="checkbox" name="articles_ids[]" value="1525247" data-select-all-name="article-listing"> <div class="article-content"> <div class="label right label__btn"> <span style="font-size: 12px; color: #1a1a1a;"> 7 pages, 1466 KiB   </span> <a href="/2227-9040/12/11/242/pdf?version=1732106844" class="UD_Listings_ArticlePDF" title="Article PDF" data-name="Enhancing the Spectral Sensitivity of Prism-Based SPR Sensors: The Role of Analyte RI" data-journal="chemosensors"> <i class="material-icons custom-download"></i> </a> </div> <div class="article-icons"><span class="label openaccess" data-dropdown="drop-article-label-openaccess" aria-expanded="false">Open Access</span><span class="label articletype">Communication</span></div> <a class="title-link" href="/2227-9040/12/11/242">Enhancing the Spectral Sensitivity of Prism-Based SPR Sensors: The Role of Analyte RI</a> <div class="authors"> by <span class="inlineblock "><strong>Wenyuan Wang</strong>, </span><span class="inlineblock "><strong>Tianfa Liao</strong>, </span><span class="inlineblock "><strong>Hongxiang Lin</strong>, </span><span class="inlineblock "><strong>Han Cui</strong> and </span><span class="inlineblock "><strong>Xiaohui Wei</strong></span> </div> <div class="color-grey-dark"> <em>Chemosensors</em> <b>2024</b>, <em>12</em>(11), 242; <a href="https://doi.org/10.3390/chemosensors12110242">https://doi.org/10.3390/chemosensors12110242</a> - 20 Nov 2024 </div> Viewed by 315 <div class="abstract-div"> <a href="#" onclick="$(this).next('.abstract-cropped').toggleClass('inline').next('.abstract-full').toggleClass('inline'); return false;"> <strong>Abstract </strong> </a> <div class="abstract-cropped inline"> A theoretical approach is presented to significantly enhance the spectral sensitivity of prism-based SPR sensors. The spectral sensitivity of prism-based SPR sensors is derived based on the coupling conditions of SPR and might exceed 10<sup>5</sup> nm/RIU for analytes with large RI values <a href="#" data-counterslink = "https://www.mdpi.com/2227-9040/12/11/242/more" onclick="$(this).parents('.abstract-cropped').toggleClass('inline').next('.abstract-full').toggleClass('inline'); return false;"> [...] Read more.</a> </div> <div class="abstract-full "> A theoretical approach is presented to significantly enhance the spectral sensitivity of prism-based SPR sensors. The spectral sensitivity of prism-based SPR sensors is derived based on the coupling conditions of SPR and might exceed 10<sup>5</sup> nm/RIU for analytes with large RI values when other sensor parameters are carefully considered, including the RI of the prism, the angle of incidence, and the SPR active material. The spectral sensitivity could be markedly enhanced, reaching up to 10,000 nm/RIU by fine-tuning the effective RI of the incident light to be slightly larger, specifically 0.01~0.02 RIU, than the RI of the analyte, which is attributed to the large dielectric permittivity of the SPR active material, the key factor for achieving high sensitivity. The dynamic range is 0.040 RIU in the case of high sensitivity, which is sufficient in most applications. Moreover, the spectral sensitivity could be pushed even higher, into the range of 10<sup>6</sup>~10<sup>8</sup> nm/RIU, by positioning the effective RI of the incident light closer to that of the analyte. However, it requires a careful balance between optimizing the sensitivity and maintaining an acceptable dynamic range. <a href="/2227-9040/12/11/242">Full article</a> </div> </div> <div class="belongsTo" style="margin-bottom: 10px;"> (This article belongs to the Special Issue <a href=" /journal/chemosensors/special_issues/84IKB7MEX4 ">Advanced Surface Plasmon Resonance Sensors</a>)<br/> </div> <a href="#" class="abstract-figures-show" data-counterslink = "https://www.mdpi.com/2227-9040/12/11/242/show" ><span >►</span><span style=" display: none;">▼</span> Show Figures </a><div class="abstract-image-preview "><div class="arrow left-arrow" id="prev1525247"><i class="fa fa-caret-left"></i></div><div class="arrow right-arrow" id="next1525247"><i class="fa fa-caret-right"></i></div><div class="absgraph cycle-slideshow manual" data-cycle-fx="scrollHorz" data-cycle-timeout="0" data-cycle-next="#next1525247" data-cycle-prev="#prev1525247" data-cycle-progressive="#images1525247" data-cycle-slides=">div" data-cycle-log="false"><div class='openpopupgallery cycle-slide' data-imgindex='0' data-target='article-1525247-popup'><span class="helper"></span><img src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=" data-src="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00242/article_deploy/html/images/chemosensors-12-00242-g001-550.jpg?1732106917" alt="" style="border: 0;"><p>Figure 1</p></div><script id="images1525247" type="text/cycle" data-cycle-split="---"><div class='openpopupgallery' data-imgindex='1' data-target='article-1525247-popup'><span class="helper"></span><img src='https://pub.mdpi-res.com/chemosensors/chemosensors-12-00242/article_deploy/html/images/chemosensors-12-00242-g002-550.jpg?1732106918'><p>Figure 2</p></div> --- <div class='openpopupgallery' data-imgindex='2' data-target='article-1525247-popup'><span class="helper"></span><img src='https://pub.mdpi-res.com/chemosensors/chemosensors-12-00242/article_deploy/html/images/chemosensors-12-00242-g003-550.jpg?1732106919'><p>Figure 3</p></div> --- <div class='openpopupgallery' data-imgindex='3' data-target='article-1525247-popup'><span class="helper"></span><img src='https://pub.mdpi-res.com/chemosensors/chemosensors-12-00242/article_deploy/html/images/chemosensors-12-00242-g004-550.jpg?1732106919'><p>Figure 4</p></div></script></div></div><div id="article-1525247-popup" class="popupgallery" style="display: inline; line-height: 200%"><a href="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00242/article_deploy/html/images/chemosensors-12-00242-g001-550.jpg?1732106917" title=" <strong>Figure 1</strong><br/> <p>Scheme diagrams of (<b>a</b>) the excitation of the SPW by the prism with the ATR method and (<b>b</b>) the wavelength interrogation method.</p> <strong style='display: block; margin-top: 10px; font-size: 18px;'><a style='color: #fff' href='/2227-9040/12/11/242'>Full article</a></strong> "></a><a href="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00242/article_deploy/html/images/chemosensors-12-00242-g002-550.jpg?1732106918" title=" <strong>Figure 2</strong><br/> <p>Spectral sensitivity versus the RI of the analyte. The red dotted line is the approximation to the black solid line when neglecting the dispersion of the prism.</p> <strong style='display: block; margin-top: 10px; font-size: 18px;'><a style='color: #fff' href='/2227-9040/12/11/242'>Full article</a></strong> "></a><a href="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00242/article_deploy/html/images/chemosensors-12-00242-g003-550.jpg?1732106919" title=" <strong>Figure 3</strong><br/> <p>(<b>a</b>) Root of spectral sensitivity versus the RI of the analyte and derivation of the dielectric permittivity of SPR active material to the wavelength with three effective RIs of the incident light, purple: 1.1426, cyan: 1.3347, and yellow: 1.4356. (<b>b</b>) The magnification of (<b>a</b>) for the root of spectral sensitivity is set from 30 to 100.</p> <strong style='display: block; margin-top: 10px; font-size: 18px;'><a style='color: #fff' href='/2227-9040/12/11/242'>Full article</a></strong> "></a><a href="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00242/article_deploy/html/images/chemosensors-12-00242-g004-550.jpg?1732106919" title=" <strong>Figure 4</strong><br/> <p>The correlations of the dielectric permittivity of SPR active material and the spectral sensitivity with the RI of the analyte where the effective RI of the incident light and the derivations of the dielectric permittivity of SPR active material to the wavelength are set at 1.3347 (the dotted line) and −0.2 /nm, respectively.</p> <strong style='display: block; margin-top: 10px; font-size: 18px;'><a style='color: #fff' href='/2227-9040/12/11/242'>Full article</a></strong> "></a></div> </div> </div> <div class="generic-item article-item"> <input class="article-list-checkbox export-element" type="checkbox" name="articles_ids[]" value="1525036" data-select-all-name="article-listing"> <div class="article-content"> <div class="label right label__btn"> <span style="font-size: 12px; color: #1a1a1a;"> 13 pages, 1717 KiB   </span> <a href="/2227-9040/12/11/241/pdf?version=1732096740" class="UD_Listings_ArticlePDF" title="Article PDF" data-name="Cleavage Reaction Lateral Flow Assays for Salivary Pepsin Measurement Using a Pepsin-Susceptible Peptide Substrate" data-journal="chemosensors"> <i class="material-icons custom-download"></i> </a> </div> <div class="article-icons"><span class="label openaccess" data-dropdown="drop-article-label-openaccess" aria-expanded="false">Open Access</span><span class="label articletype">Article</span></div> <a class="title-link" href="/2227-9040/12/11/241">Cleavage Reaction Lateral Flow Assays for Salivary Pepsin Measurement Using a Pepsin-Susceptible Peptide Substrate</a> <div class="authors"> by <span class="inlineblock "><strong>Sung-Woong Kang</strong>, </span><span class="inlineblock "><strong>Young Ju Lee</strong>, </span><span class="inlineblock "><strong>Jae-Chul Lee</strong>, </span><span class="inlineblock "><strong>Young-Gyu Eun</strong> and </span><span class="inlineblock "><strong>Gi-Ja Lee</strong></span> </div> <div class="color-grey-dark"> <em>Chemosensors</em> <b>2024</b>, <em>12</em>(11), 241; <a href="https://doi.org/10.3390/chemosensors12110241">https://doi.org/10.3390/chemosensors12110241</a> - 20 Nov 2024 </div> Viewed by 344 <div class="abstract-div"> <a href="#" onclick="$(this).next('.abstract-cropped').toggleClass('inline').next('.abstract-full').toggleClass('inline'); return false;"> <strong>Abstract </strong> </a> <div class="abstract-cropped inline"> In this study, we introduce a novel cleavage reaction lateral flow assay (LFA) based on pepsin activity against a pepsin-susceptible peptide (PSP) substrate to detect salivary pepsin. Two types of cleavage reaction LFAs, the within-tube and on-strip cleavage reactions, were prepared based on <a href="#" data-counterslink = "https://www.mdpi.com/2227-9040/12/11/241/more" onclick="$(this).parents('.abstract-cropped').toggleClass('inline').next('.abstract-full').toggleClass('inline'); return false;"> [...] Read more.</a> </div> <div class="abstract-full "> In this study, we introduce a novel cleavage reaction lateral flow assay (LFA) based on pepsin activity against a pepsin-susceptible peptide (PSP) substrate to detect salivary pepsin. Two types of cleavage reaction LFAs, the within-tube and on-strip cleavage reactions, were prepared based on the PSP and pepsin reaction location. In the within-tube cleavage reaction LFA, samples were treated in the microtube within a heating block for 30 min separately and subsequently developed with running buffer in the LFA. For the on-strip cleavage reaction, samples were treated on the reaction zone of the strip within the heating zone of the multifunctional strip cassette for 10 min. After developing the running buffer in the LFA, the assay image was obtained using a universal mobile reader with a multifunctional strip cassette. The within-tube cleavage reaction LFA showed high sensitivity (limit of detection [LOD] 1.9 ng/mL), good specificity, and high reproducibility. This assay exhibited better linearity in the log concentration range of pepsin (4–500 ng/mL) than a commercially available dipstick assay. The on-strip cleavage reaction LFA showed a similar sensitivity (LOD 1.4 ng/mL) to that of the within-tube reaction assay. Therefore, we expect these cleavage reaction LFAs using PSP to be utilized as simple and effective tools to detect salivary pepsin. <a href="/2227-9040/12/11/241">Full article</a> </div> </div> <div class="belongsTo" style="margin-bottom: 10px;"> (This article belongs to the Special Issue <a href=" /journal/chemosensors/special_issues/PHN8YRNJ9G ">Rapid Point-of-Care Testing Technology and Application</a>)<br/> </div> <a href="#" class="abstract-figures-show" data-counterslink = "https://www.mdpi.com/2227-9040/12/11/241/show" ><span >►</span><span style=" display: none;">▼</span> Show Figures </a><div class="abstract-image-preview "><div class="arrow left-arrow" id="prev1525036"><i class="fa fa-caret-left"></i></div><div class="arrow right-arrow" id="next1525036"><i class="fa fa-caret-right"></i></div><div class="absgraph cycle-slideshow manual" data-cycle-fx="scrollHorz" data-cycle-timeout="0" data-cycle-next="#next1525036" data-cycle-prev="#prev1525036" data-cycle-progressive="#images1525036" data-cycle-slides=">div" data-cycle-log="false"><div class='openpopupgallery cycle-slide' data-imgindex='0' data-target='article-1525036-popup'><span class="helper"></span><img src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=" data-src="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00241/article_deploy/html/images/chemosensors-12-00241-g001-550.jpg?1732096834" alt="" style="border: 0;"><p>Figure 1</p></div><script id="images1525036" type="text/cycle" data-cycle-split="---"><div class='openpopupgallery' data-imgindex='1' data-target='article-1525036-popup'><span class="helper"></span><img src='https://pub.mdpi-res.com/chemosensors/chemosensors-12-00241/article_deploy/html/images/chemosensors-12-00241-g002-550.jpg?1732096836'><p>Figure 2</p></div> --- <div class='openpopupgallery' data-imgindex='2' data-target='article-1525036-popup'><span class="helper"></span><img src='https://pub.mdpi-res.com/chemosensors/chemosensors-12-00241/article_deploy/html/images/chemosensors-12-00241-g003-550.jpg?1732096839'><p>Figure 3</p></div> --- <div class='openpopupgallery' data-imgindex='3' data-target='article-1525036-popup'><span class="helper"></span><img src='https://pub.mdpi-res.com/chemosensors/chemosensors-12-00241/article_deploy/html/images/chemosensors-12-00241-g004-550.jpg?1732096841'><p>Figure 4</p></div></script></div></div><div id="article-1525036-popup" class="popupgallery" style="display: inline; line-height: 200%"><a href="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00241/article_deploy/html/images/chemosensors-12-00241-g001-550.jpg?1732096834" title=" <strong>Figure 1</strong><br/> <p>A schematic demonstrating the detection principle of the PSP-based cleavage reaction LFA. The cleavage reaction of PSP by pepsin was performed in a microtube within a heating block (within-tube cleavage reaction LFA) and the reaction zone of the strip within a multifunctional strip cassette (on-strip cleavage reaction LFA), respectively. The black dashed arrow indicates a magnification of the area marked with a red box. After the reaction, samples were developed with a running buffer for 20 min. Increased pepsin quantity indicates a greater decrease in the test line color intensity (black solid arrow: without pepsin, red solid arrow: with pepsin).</p> <strong style='display: block; margin-top: 10px; font-size: 18px;'><a style='color: #fff' href='/2227-9040/12/11/241'>Full article</a></strong> "></a><a href="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00241/article_deploy/html/images/chemosensors-12-00241-g002-550.jpg?1732096836" title=" <strong>Figure 2</strong><br/> <p>Optimization of PSP-based cleavage reaction lateral flow assay conditions for pepsin detection: concentrations of (<b>a</b>) PSP reporter and (<b>b</b>) polystreptavidin R, (<b>c</b>) running buffer types, and (<b>d</b>) Tween-20 concentration added to the running buffer. Error bars represent standard deviation of the mean (<span class="html-italic">n</span> = 3).</p> <strong style='display: block; margin-top: 10px; font-size: 18px;'><a style='color: #fff' href='/2227-9040/12/11/241'>Full article</a></strong> "></a><a href="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00241/article_deploy/html/images/chemosensors-12-00241-g003-550.jpg?1732096839" title=" <strong>Figure 3</strong><br/> <p>(<b>a</b>) The differences between test line peak areas without (black bar) and with pepsin (100 ng/mL, blue bar) according to the concentration of Au-FITC Ab conjugates in the PSP-based within-tube cleavage reaction LFA. The green dashed arrow indicates the greatest color change in the test line with and without pepsin. (<b>b</b>) Calibration plots of test line peak area changes in the general type, PSP-based LFA versus log concentration of pepsin (4–500 ng/mL, <span class="html-italic">n</span> = 3). (<b>c</b>) The reproducibility of PSP-based LFA, determined via measuring the changes in test line peak areas to pepsin (100 ng/mL) in six assays on different dates. (<b>d</b>) Changes in test line peak areas of PSP-based LFA after reaction with 500 ng/mL of pepsin and four different enzymes: mucin (Mu, 15 μg/mL), trypsin (Tryp, 15 μg/mL), lysozyme (Lyso, 15 μg/mL), and amylase (Amyl, 50 μg/mL).</p> <strong style='display: block; margin-top: 10px; font-size: 18px;'><a style='color: #fff' href='/2227-9040/12/11/241'>Full article</a></strong> "></a><a href="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00241/article_deploy/html/images/chemosensors-12-00241-g004-550.jpg?1732096841" title=" <strong>Figure 4</strong><br/> <p>(<b>a</b>) Comparison between the relative changes (%) in results versus the pepsin concentration in the within-tube cleavage reaction LFA and commercially available HybriDetect<sup>TM</sup> dipstick assay. (<b>b</b>) Photographic images of multifunctional strip cassette. The LF strip is placed on the base plate with a heating zone and a mobile camera lens with light-emitting diodes can supply constant and homogenous light. A clip-type multifunctional strip cassette is integrated with a mobile phone. (<b>c</b>) Calibration plot of changes in the test line peak area versus the pepsin concentration of the on-strip cleavage reaction LFA using a multifunctional strip cassette.</p> <strong style='display: block; margin-top: 10px; font-size: 18px;'><a style='color: #fff' href='/2227-9040/12/11/241'>Full article</a></strong> "></a></div> </div> </div> <div class="generic-item article-item"> <input class="article-list-checkbox export-element" type="checkbox" name="articles_ids[]" value="1522783" data-select-all-name="article-listing"> <div class="article-content"> <div class="label right label__btn"> <span style="font-size: 12px; color: #1a1a1a;"> 11 pages, 1390 KiB   </span> <a href="/2227-9040/12/11/240/pdf?version=1731835257" class="UD_Listings_ArticlePDF" title="Article PDF" data-name="Pollution Monitoring via Potentiometric Membrane Sensors for the Determination of Chlorpromazine Hydrochloride in the Presence of Its Main Photo-Degradation Products in River Water" data-journal="chemosensors"> <i class="material-icons custom-download"></i> </a> </div> <div class="article-icons"><span class="label openaccess" data-dropdown="drop-article-label-openaccess" aria-expanded="false">Open Access</span><span class="label articletype">Article</span></div> <a class="title-link" href="/2227-9040/12/11/240">Pollution Monitoring via Potentiometric Membrane Sensors for the Determination of Chlorpromazine Hydrochloride in the Presence of Its Main Photo-Degradation Products in River Water</a> <div class="authors"> by <span class="inlineblock "><strong>Sherif A. Abdel-Gawad</strong> and </span><span class="inlineblock "><strong>Ali Altharawi</strong></span> </div> <div class="color-grey-dark"> <em>Chemosensors</em> <b>2024</b>, <em>12</em>(11), 240; <a href="https://doi.org/10.3390/chemosensors12110240">https://doi.org/10.3390/chemosensors12110240</a> - 17 Nov 2024 </div> Viewed by 351 <div class="abstract-div"> <a href="#" onclick="$(this).next('.abstract-cropped').toggleClass('inline').next('.abstract-full').toggleClass('inline'); return false;"> <strong>Abstract </strong> </a> <div class="abstract-cropped inline"> The utilization of membrane sensors for the monitoring and determination of pharmaceutical environmental pollutants has emerged as a crucial objective in recent years. Given the extensive use of chlorpromazine hydrochloride (CPZ) in medicine, its presence in the environment, particularly in surface water such <a href="#" data-counterslink = "https://www.mdpi.com/2227-9040/12/11/240/more" onclick="$(this).parents('.abstract-cropped').toggleClass('inline').next('.abstract-full').toggleClass('inline'); return false;"> [...] Read more.</a> </div> <div class="abstract-full "> The utilization of membrane sensors for the monitoring and determination of pharmaceutical environmental pollutants has emerged as a crucial objective in recent years. Given the extensive use of chlorpromazine hydrochloride (CPZ) in medicine, its presence in the environment, particularly in surface water such as rivers, is highly probable. Prolonged exposure of river water to sunlight and the photo-degradability of CPZ may enhance its photo-degradation. For the purpose of measuring CPZ in the presence of its primary photo-degradants, two sensitive and selective membrane electrodes were developed. These were synthesized utilizing two ion-pairing agents: sodium tetraphenylborate (TPB) and phosphotungstic acid (PTA). The electrodes exhibited a linear range that extended from 1 × 10<sup>−6</sup> M to 1 × 10<sup>−2</sup> M. The membrane electrodes of CPZ-TPB and CPZ-PTA exhibited slopes of 59.90 ± 0.60 mV/decade and 58.90 ± 0.80 mV/decade, respectively. The sensors mentioned above showed acceptable performance in a pH range of 2.0 to 6.0. All test parameters were optimized to provide superior electrochemical performance. The fabricated membranes were effectively employed to sensitively quantify CPZ in the presence of its principal photodegradants. The developed sensors were successfully employed to quantify CPZ in river water samples without necessitating pre-treatment procedures. <a href="/2227-9040/12/11/240">Full article</a> </div> </div> <div class="belongsTo" style="margin-bottom: 10px;"> (This article belongs to the Special Issue <a href=" /journal/chemosensors/special_issues/K73Z7830UA ">Chemical Sensors for Bio-Medical and Environmental Applications, 2nd Edition</a>)<br/> </div> <a href="#" class="abstract-figures-show" data-counterslink = "https://www.mdpi.com/2227-9040/12/11/240/show" ><span >►</span><span style=" display: none;">▼</span> Show Figures </a><div class="abstract-image-preview "><div class="arrow left-arrow" id="prev1522783"><i class="fa fa-caret-left"></i></div><div class="arrow right-arrow" id="next1522783"><i class="fa fa-caret-right"></i></div><div class="absgraph cycle-slideshow manual" data-cycle-fx="scrollHorz" data-cycle-timeout="0" data-cycle-next="#next1522783" data-cycle-prev="#prev1522783" data-cycle-progressive="#images1522783" data-cycle-slides=">div" data-cycle-log="false"><div class='openpopupgallery cycle-slide' data-imgindex='0' data-target='article-1522783-popup'><span class="helper"></span><img src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=" data-src="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00240/article_deploy/html/images/chemosensors-12-00240-g001-550.jpg?1731835360" alt="" style="border: 0;"><p>Figure 1</p></div><script id="images1522783" type="text/cycle" data-cycle-split="---"><div class='openpopupgallery' data-imgindex='1' data-target='article-1522783-popup'><span class="helper"></span><img src='https://pub.mdpi-res.com/chemosensors/chemosensors-12-00240/article_deploy/html/images/chemosensors-12-00240-g002-550.jpg?1731835361'><p>Figure 2</p></div> --- <div class='openpopupgallery' data-imgindex='2' data-target='article-1522783-popup'><span class="helper"></span><img src='https://pub.mdpi-res.com/chemosensors/chemosensors-12-00240/article_deploy/html/images/chemosensors-12-00240-g003-550.jpg?1731835362'><p>Figure 3</p></div> --- <div class='openpopupgallery' data-imgindex='3' data-target='article-1522783-popup'><span class="helper"></span><img src='https://pub.mdpi-res.com/chemosensors/chemosensors-12-00240/article_deploy/html/images/chemosensors-12-00240-g004-550.jpg?1731835363'><p>Figure 4</p></div></script></div></div><div id="article-1522783-popup" class="popupgallery" style="display: inline; line-height: 200%"><a href="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00240/article_deploy/html/images/chemosensors-12-00240-g001-550.jpg?1731835360" title=" <strong>Figure 1</strong><br/> <p>Chemical structure of CPZ (<b>A</b>), chlorpromazine sulfoxide (<b>B</b>), and 2-hydroxypromazine (<b>C</b>).</p> <strong style='display: block; margin-top: 10px; font-size: 18px;'><a style='color: #fff' href='/2227-9040/12/11/240'>Full article</a></strong> "></a><a href="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00240/article_deploy/html/images/chemosensors-12-00240-g002-550.jpg?1731835361" title=" <strong>Figure 2</strong><br/> <p>Profile of the potential (in mV) versus −log concentration (in M) for CPZ sensors at pH 4.</p> <strong style='display: block; margin-top: 10px; font-size: 18px;'><a style='color: #fff' href='/2227-9040/12/11/240'>Full article</a></strong> "></a><a href="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00240/article_deploy/html/images/chemosensors-12-00240-g003-550.jpg?1731835362" title=" <strong>Figure 3</strong><br/> <p>pH effect on the potential response of CPZ membrane sensors.</p> <strong style='display: block; margin-top: 10px; font-size: 18px;'><a style='color: #fff' href='/2227-9040/12/11/240'>Full article</a></strong> "></a><a href="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00240/article_deploy/html/images/chemosensors-12-00240-g004-550.jpg?1731835363" title=" <strong>Figure 4</strong><br/> <p>Stability of the CPZ-fabricated membrane sensors.</p> <strong style='display: block; margin-top: 10px; font-size: 18px;'><a style='color: #fff' href='/2227-9040/12/11/240'>Full article</a></strong> "></a></div> </div> </div> <div class="generic-item article-item"> <input class="article-list-checkbox export-element" type="checkbox" name="articles_ids[]" value="1522694" data-select-all-name="article-listing"> <div class="article-content"> <div class="label right label__btn"> <span style="font-size: 12px; color: #1a1a1a;"> 10 pages, 7589 KiB   </span> <a href="/2227-9040/12/11/239/pdf?version=1731830429" class="UD_Listings_ArticlePDF" title="Article PDF" data-name="A Theoretical Examination of Various Complexes of a Proposed Novel Chemosensor Material—Graphene/SiC" data-journal="chemosensors"> <i class="material-icons custom-download"></i> </a> </div> <div class="article-icons"><span class="label openaccess" data-dropdown="drop-article-label-openaccess" aria-expanded="false">Open Access</span><span class="label articletype">Communication</span></div> <a class="title-link" href="/2227-9040/12/11/239">A Theoretical Examination of Various Complexes of a Proposed Novel Chemosensor Material—Graphene/SiC</a> <div class="authors"> by <span class="inlineblock "><strong>Dobromir A. Kalchevski</strong>, </span><span class="inlineblock "><strong>Stefan Kolev</strong>, </span><span class="inlineblock "><strong>Dimitar Dimov</strong>, </span><span class="inlineblock "><strong>Dimitar Trifonov</strong>, </span><span class="inlineblock "><strong>Ivalina Avramova</strong>, </span><span class="inlineblock "><strong>Pavlina Ivanova</strong> and </span><span class="inlineblock "><strong>Teodor Milenov</strong></span> </div> <div class="color-grey-dark"> <em>Chemosensors</em> <b>2024</b>, <em>12</em>(11), 239; <a href="https://doi.org/10.3390/chemosensors12110239">https://doi.org/10.3390/chemosensors12110239</a> - 17 Nov 2024 </div> Viewed by 362 <div class="abstract-div"> <a href="#" onclick="$(this).next('.abstract-cropped').toggleClass('inline').next('.abstract-full').toggleClass('inline'); return false;"> <strong>Abstract </strong> </a> <div class="abstract-cropped inline"> The potential of semiconducting, corrugated graphene, grown on silicon carbide, as an active element in chemosensors is studied in the present work. For this purpose, the adsorption of benzene, diazepam and 2,3,7,8-tetrachlorodibenzo-<i>p</i>-dioxin (TCDD) on the material’s surface was modeled. According to <a href="#" data-counterslink = "https://www.mdpi.com/2227-9040/12/11/239/more" onclick="$(this).parents('.abstract-cropped').toggleClass('inline').next('.abstract-full').toggleClass('inline'); return false;"> [...] Read more.</a> </div> <div class="abstract-full "> The potential of semiconducting, corrugated graphene, grown on silicon carbide, as an active element in chemosensors is studied in the present work. For this purpose, the adsorption of benzene, diazepam and 2,3,7,8-tetrachlorodibenzo-<i>p</i>-dioxin (TCDD) on the material’s surface was modeled. According to the graphene sheet bending and adsorbate–adsorbent distances, the heterostructure favors the ligands in the order of diazepam < benzene < TCDD. The apparent ambiguity in the results for diazepam is easy to explain. The abundance of lone pairs and π-electrons compensates for the low-symmetry, non-planar, far from optimal (adsorption-wise) geometry. The maximum band gap change in the heterostructure, caused by adsorption, is 0.02 eV. Intermolecular binding does not alter the HOMO–LUMO difference in benzene and TCDD by more than 0.01 eV. The completely planar molecules are not expected to undergo significant geometrical changes; hence, the alteration in their frontier orbitals is also minimal. The adsorption of diazepam, however, causes significant changes in the projected density of states of both structures in the complex. In conclusion, corrugated graphene is applicable as an active material in selective chemosensors for non-planar aromatic molecules. <a href="/2227-9040/12/11/239">Full article</a> </div> </div> <div class="belongsTo" style="margin-bottom: 10px;"> (This article belongs to the Special Issue <a href=" /journal/chemosensors/special_issues/E3R7N7KNR7 ">Recent Advances in Electrode Materials for Electrochemical Sensing</a>)<br/> </div> <a href="#" class="abstract-figures-show" data-counterslink = "https://www.mdpi.com/2227-9040/12/11/239/show" ><span >►</span><span style=" display: none;">▼</span> Show Figures </a><div class="abstract-image-preview "><div class="arrow left-arrow" id="prev1522694"><i class="fa fa-caret-left"></i></div><div class="arrow right-arrow" id="next1522694"><i class="fa fa-caret-right"></i></div><div class="absgraph cycle-slideshow manual" data-cycle-fx="scrollHorz" data-cycle-timeout="0" data-cycle-next="#next1522694" data-cycle-prev="#prev1522694" data-cycle-progressive="#images1522694" data-cycle-slides=">div" data-cycle-log="false"><div class='openpopupgallery cycle-slide' data-imgindex='0' data-target='article-1522694-popup'><span class="helper"></span><img src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=" data-src="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00239/article_deploy/html/images/chemosensors-12-00239-g001-550.jpg?1731830534" alt="" style="border: 0;"><p>Figure 1</p></div><script id="images1522694" type="text/cycle" data-cycle-split="---"><div class='openpopupgallery' data-imgindex='1' data-target='article-1522694-popup'><span class="helper"></span><img src='https://pub.mdpi-res.com/chemosensors/chemosensors-12-00239/article_deploy/html/images/chemosensors-12-00239-g002-550.jpg?1731830535'><p>Figure 2</p></div> --- <div class='openpopupgallery' data-imgindex='2' data-target='article-1522694-popup'><span class="helper"></span><img src='https://pub.mdpi-res.com/chemosensors/chemosensors-12-00239/article_deploy/html/images/chemosensors-12-00239-g003-550.jpg?1731830536'><p>Figure 3</p></div> --- <div class='openpopupgallery' data-imgindex='3' data-target='article-1522694-popup'><span class="helper"></span><img src='https://pub.mdpi-res.com/chemosensors/chemosensors-12-00239/article_deploy/html/images/chemosensors-12-00239-g004-550.jpg?1731830537'><p>Figure 4</p></div> --- <div class='openpopupgallery' data-imgindex='4' data-target='article-1522694-popup'><span class="helper"></span><img src='https://pub.mdpi-res.com/chemosensors/chemosensors-12-00239/article_deploy/html/images/chemosensors-12-00239-g005-550.jpg?1731830538'><p>Figure 5</p></div> --- <div class='openpopupgallery' data-imgindex='5' data-target='article-1522694-popup'><span class="helper"></span><img src='https://pub.mdpi-res.com/chemosensors/chemosensors-12-00239/article_deploy/html/images/chemosensors-12-00239-g006-550.jpg?1731830540'><p>Figure 6</p></div> --- <div class='openpopupgallery' data-imgindex='6' data-target='article-1522694-popup'><span class="helper"></span><img src='https://pub.mdpi-res.com/chemosensors/chemosensors-12-00239/article_deploy/html/images/chemosensors-12-00239-g007-550.jpg?1731830541'><p>Figure 7</p></div> --- <div class='openpopupgallery' data-imgindex='7' data-target='article-1522694-popup'><span class="helper"></span><img src='https://pub.mdpi-res.com/chemosensors/chemosensors-12-00239/article_deploy/html/images/chemosensors-12-00239-g008-550.jpg?1731830542'><p>Figure 8</p></div></script></div></div><div id="article-1522694-popup" class="popupgallery" style="display: inline; line-height: 200%"><a href="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00239/article_deploy/html/images/chemosensors-12-00239-g001-550.jpg?1731830534" title=" <strong>Figure 1</strong><br/> <p>Optimized geometries of single cells of (<b>a</b>) PhH/G/SiC, (<b>b</b>) D/G/SiC and (<b>c</b>) TCDD/G/SiC. Although it may appear that there are tangled bonds, in the periodic supercells, all atoms exhibit the maximum valence. The gray balls denote the carbon atoms, and the gray sticks the bonds between them, while the red, blue and green balls denote the oxygen, nitrogen and chlorine atoms, respectively.</p> <strong style='display: block; margin-top: 10px; font-size: 18px;'><a style='color: #fff' href='/2227-9040/12/11/239'>Full article</a></strong> "></a><a href="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00239/article_deploy/html/images/chemosensors-12-00239-g002-550.jpg?1731830535" title=" <strong>Figure 2</strong><br/> <p>Significant 3- and 4-point angles in the geometry of (<b>a</b>) graphene and (<b>b</b>) diazepam. Note the atoms, designated with blue dots in (<b>b</b>)—their nuclei define the reference plane for the density plots.</p> <strong style='display: block; margin-top: 10px; font-size: 18px;'><a style='color: #fff' href='/2227-9040/12/11/239'>Full article</a></strong> "></a><a href="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00239/article_deploy/html/images/chemosensors-12-00239-g003-550.jpg?1731830536" title=" <strong>Figure 3</strong><br/> <p>Band structures of (<b>a</b>) PhH, (<b>b</b>) G/SiC and (<b>c</b>) PhH/G/SiC. The frontier orbitals are colored in blue for G/SiC and orange for PhH. The values of all diagrams are adjusted to the same scale, in which the HOMO of the clean G/SiC is at 0 eV.</p> <strong style='display: block; margin-top: 10px; font-size: 18px;'><a style='color: #fff' href='/2227-9040/12/11/239'>Full article</a></strong> "></a><a href="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00239/article_deploy/html/images/chemosensors-12-00239-g004-550.jpg?1731830537" title=" <strong>Figure 4</strong><br/> <p>PDOS of (<b>a</b>) the adsorbent, (<b>b</b>) the adsorbate and (<b>c</b>) the adsorbent–adsorbate system PhH/G/SiC. Dotted lines are for the C and Si atoms in SiC. Dashed lines are for the C atoms of graphene. Continuous lines are for the H and C atoms in PhH. Si is in orange, C is in gray and H is in gold. The values of all diagrams are adjusted to the same scale, in which the HOMO of the clean G/SiC is at 0 eV.</p> <strong style='display: block; margin-top: 10px; font-size: 18px;'><a style='color: #fff' href='/2227-9040/12/11/239'>Full article</a></strong> "></a><a href="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00239/article_deploy/html/images/chemosensors-12-00239-g005-550.jpg?1731830538" title=" <strong>Figure 5</strong><br/> <p>Band structures of (<b>a</b>) TCDD, (<b>b</b>) G/SiC and (<b>c</b>) TCDD/G/SiC. The frontier orbitals are colored in blue for G/SiC and orange for TCDD. The values of all diagrams are adjusted to the same scale, in which the HOMO of the clean G/SiC is at 0 eV.</p> <strong style='display: block; margin-top: 10px; font-size: 18px;'><a style='color: #fff' href='/2227-9040/12/11/239'>Full article</a></strong> "></a><a href="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00239/article_deploy/html/images/chemosensors-12-00239-g006-550.jpg?1731830540" title=" <strong>Figure 6</strong><br/> <p>Band structures of (<b>a</b>) D, (<b>b</b>) G/SiC and (<b>c</b>) D/G/SiC. The frontier orbitals are colored in blue for G/SiC and orange for D. The values of all diagrams are adjusted to the same scale, in which the HOMO of the clean G/SiC is at 0 eV.</p> <strong style='display: block; margin-top: 10px; font-size: 18px;'><a style='color: #fff' href='/2227-9040/12/11/239'>Full article</a></strong> "></a><a href="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00239/article_deploy/html/images/chemosensors-12-00239-g007-550.jpg?1731830541" title=" <strong>Figure 7</strong><br/> <p>PDOS of (<b>a</b>) the adsorbent, (<b>b</b>) the adsorbate and (<b>c</b>) the adsorbent–adsorbate system TCDD/G/SiC. Dotted lines are for the C and Si atoms in SiC. Dashed lines are for the C atoms of graphene. Continuous lines are for the H, C, O and Cl atoms in TCDD. Si is in orange, C is in gray, H is in dark yellow, O is in red and Cl is in green. The values of all diagrams are adjusted to the same scale, in which the HOMO of the clean G/SiC is at 0 eV.</p> <strong style='display: block; margin-top: 10px; font-size: 18px;'><a style='color: #fff' href='/2227-9040/12/11/239'>Full article</a></strong> "></a><a href="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00239/article_deploy/html/images/chemosensors-12-00239-g008-550.jpg?1731830542" title=" <strong>Figure 8</strong><br/> <p>PDOS of (<b>a</b>) the adsorbent, (<b>b</b>) the adsorbate and (<b>c</b>) the adsorbent–adsorbate system D/G/SiC. Dotted lines are for the C and Si atoms in SiC. Dashed lines are for the C atoms of graphene. Continuous lines are for the H, C, N, O and Cl atoms in D. Si is in orange, C is in gray, N is in blue, O is in red and Cl is in green. The values of all diagrams are adjusted to the same scale, in which the HOMO of the clean G/SiC is at 0 eV.</p> <strong style='display: block; margin-top: 10px; font-size: 18px;'><a style='color: #fff' href='/2227-9040/12/11/239'>Full article</a></strong> "></a></div> </div> </div> <div class="generic-item article-item"> <input class="article-list-checkbox export-element" type="checkbox" name="articles_ids[]" value="1522490" data-select-all-name="article-listing"> <div class="article-content"> <div class="label right label__btn"> <span style="font-size: 12px; color: #1a1a1a;"> 12 pages, 8606 KiB   </span> <a href="/2227-9040/12/11/238/pdf?version=1731750592" class="UD_Listings_ArticlePDF" title="Article PDF" data-name="CO2 Interaction Mechanism of SnO2-Based Sensors with Respect to the Pt Interdigital Electrodes Gap" data-journal="chemosensors"> <i class="material-icons custom-download"></i> </a> </div> <div class="article-icons"><span class="label openaccess" data-dropdown="drop-article-label-openaccess" aria-expanded="false">Open Access</span><span class="label articletype">Article</span></div> <a class="title-link" href="/2227-9040/12/11/238">CO<sub>2</sub> Interaction Mechanism of SnO<sub>2</sub>-Based Sensors with Respect to the Pt Interdigital Electrodes Gap</a> <div class="authors"> by <span class="inlineblock "><strong>Adelina Stanoiu</strong>, </span><span class="inlineblock "><strong>Alexandra Corina Iacoban</strong>, </span><span class="inlineblock "><strong>Catalina Gabriela Mihalcea</strong>, </span><span class="inlineblock "><strong>Ion Viorel Dinu</strong>, </span><span class="inlineblock "><strong>Ovidiu Gabriel Florea</strong>, </span><span class="inlineblock "><strong>Ioana Dorina Vlaicu</strong> and </span><span class="inlineblock "><strong>Cristian Eugen Simion</strong></span> </div> <div class="color-grey-dark"> <em>Chemosensors</em> <b>2024</b>, <em>12</em>(11), 238; <a href="https://doi.org/10.3390/chemosensors12110238">https://doi.org/10.3390/chemosensors12110238</a> - 16 Nov 2024 </div> Viewed by 477 <div class="abstract-div"> <a href="#" onclick="$(this).next('.abstract-cropped').toggleClass('inline').next('.abstract-full').toggleClass('inline'); return false;"> <strong>Abstract </strong> </a> <div class="abstract-cropped inline"> The tuning sensitivity towards CO<sub>2</sub> detection under in-field-like conditions was investigated using SnO<sub>2</sub>-sensitive material deposited onto Al<sub>2</sub>O<sub>3</sub> substrates provided with platinum electrodes with interdigital gaps of 100 µm and 30 µm. X-ray diffraction, low-magnification and high-resolution transmission <a href="#" data-counterslink = "https://www.mdpi.com/2227-9040/12/11/238/more" onclick="$(this).parents('.abstract-cropped').toggleClass('inline').next('.abstract-full').toggleClass('inline'); return false;"> [...] Read more.</a> </div> <div class="abstract-full "> The tuning sensitivity towards CO<sub>2</sub> detection under in-field-like conditions was investigated using SnO<sub>2</sub>-sensitive material deposited onto Al<sub>2</sub>O<sub>3</sub> substrates provided with platinum electrodes with interdigital gaps of 100 µm and 30 µm. X-ray diffraction, low-magnification and high-resolution transmission electron microscopy, and electrical and contact potential difference investigations were employed to understand the sensing mechanism involved in CO<sub>2</sub> detection. The morpho-structural analysis revealed that the SnO<sub>2</sub> nanoparticles exhibit well-defined facets along the (110) and (101) crystallographic planes. Complex phenomenological investigations showed that moisture significantly affects the gas sensing performance. The experimental results corroborated the literature evidence, highlighting the importance of Pt within the interdigital electrodes subsequently reflected in the increase in the CO<sub>2</sub> sensing performance with the decrease in the interdigital gap. The catalytic efficiency is explained by the distribution of platinum at the gas-Pt-SnO<sub>2</sub> three-phase boundary, which is critical for enhancing the sensor performance. <a href="/2227-9040/12/11/238">Full article</a> </div> </div> <div class="belongsTo" style="margin-bottom: 10px;"> (This article belongs to the Special Issue <a href=" /journal/chemosensors/special_issues/88970HEN61 ">Advanced Chemical Sensors for Gas Detection</a>)<br/> </div> <a href="#" class="abstract-figures-show" data-counterslink = "https://www.mdpi.com/2227-9040/12/11/238/show" ><span >►</span><span style=" display: none;">▼</span> Show Figures </a><div class="abstract-image-preview "><div class="arrow left-arrow" id="prev1522490"><i class="fa fa-caret-left"></i></div><div class="arrow right-arrow" id="next1522490"><i class="fa fa-caret-right"></i></div><div class="absgraph cycle-slideshow manual" data-cycle-fx="scrollHorz" data-cycle-timeout="0" data-cycle-next="#next1522490" data-cycle-prev="#prev1522490" data-cycle-progressive="#images1522490" data-cycle-slides=">div" data-cycle-log="false"><div class='openpopupgallery cycle-slide' data-imgindex='0' data-target='article-1522490-popup'><span class="helper"></span><img src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=" data-src="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00238/article_deploy/html/images/chemosensors-12-00238-ag-550.jpg?1731750860" alt="" style="border: 0;"><p>Graphical abstract</p></div><script id="images1522490" type="text/cycle" data-cycle-split="---"><div class='openpopupgallery' data-imgindex='1' data-target='article-1522490-popup'><span class="helper"></span><img src='https://pub.mdpi-res.com/chemosensors/chemosensors-12-00238/article_deploy/html/images/chemosensors-12-00238-g001-550.jpg?1731750842'><p>Figure 1</p></div> --- <div class='openpopupgallery' data-imgindex='2' data-target='article-1522490-popup'><span class="helper"></span><img src='https://pub.mdpi-res.com/chemosensors/chemosensors-12-00238/article_deploy/html/images/chemosensors-12-00238-g002-550.jpg?1731750843'><p>Figure 2</p></div> --- <div class='openpopupgallery' data-imgindex='3' data-target='article-1522490-popup'><span class="helper"></span><img src='https://pub.mdpi-res.com/chemosensors/chemosensors-12-00238/article_deploy/html/images/chemosensors-12-00238-g003-550.jpg?1731750847'><p>Figure 3</p></div> --- <div class='openpopupgallery' data-imgindex='4' data-target='article-1522490-popup'><span class="helper"></span><img src='https://pub.mdpi-res.com/chemosensors/chemosensors-12-00238/article_deploy/html/images/chemosensors-12-00238-g004-550.jpg?1731750852'><p>Figure 4</p></div> --- <div class='openpopupgallery' data-imgindex='5' data-target='article-1522490-popup'><span class="helper"></span><img src='https://pub.mdpi-res.com/chemosensors/chemosensors-12-00238/article_deploy/html/images/chemosensors-12-00238-g005-550.jpg?1731750852'><p>Figure 5</p></div> --- <div class='openpopupgallery' data-imgindex='6' data-target='article-1522490-popup'><span class="helper"></span><img src='https://pub.mdpi-res.com/chemosensors/chemosensors-12-00238/article_deploy/html/images/chemosensors-12-00238-g006-550.jpg?1731750854'><p>Figure 6</p></div> --- <div class='openpopupgallery' data-imgindex='7' data-target='article-1522490-popup'><span class="helper"></span><img src='https://pub.mdpi-res.com/chemosensors/chemosensors-12-00238/article_deploy/html/images/chemosensors-12-00238-g007-550.jpg?1731750856'><p>Figure 7</p></div> --- <div class='openpopupgallery' data-imgindex='8' data-target='article-1522490-popup'><span class="helper"></span><img src='https://pub.mdpi-res.com/chemosensors/chemosensors-12-00238/article_deploy/html/images/chemosensors-12-00238-g008-550.jpg?1731750857'><p>Figure 8</p></div> --- <div class='openpopupgallery' data-imgindex='9' data-target='article-1522490-popup'><span class="helper"></span><img src='https://pub.mdpi-res.com/chemosensors/chemosensors-12-00238/article_deploy/html/images/chemosensors-12-00238-g009-550.jpg?1731750857'><p>Figure 9</p></div></script></div></div><div id="article-1522490-popup" class="popupgallery" style="display: inline; line-height: 200%"><a href="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00238/article_deploy/html/images/chemosensors-12-00238-ag-550.jpg?1731750860" title=" <strong>Graphical abstract</strong><br/><strong style='display: block; margin-top: 10px; font-size: 18px;'><a style='color: #fff' href='/2227-9040/12/11/238'>Full article</a></strong> "></a><a href="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00238/article_deploy/html/images/chemosensors-12-00238-g001-550.jpg?1731750842" title=" <strong>Figure 1</strong><br/> <p>Gas Mixing System provided with a Kelvin probe involved in DC and contact potential difference measurements (<b>a</b>), a sensor chamber (<b>b</b>), and a PC dedicated to evaluation and control (<b>c</b>).</p> <strong style='display: block; margin-top: 10px; font-size: 18px;'><a style='color: #fff' href='/2227-9040/12/11/238'>Full article</a></strong> "></a><a href="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00238/article_deploy/html/images/chemosensors-12-00238-g002-550.jpg?1731750843" title=" <strong>Figure 2</strong><br/> <p>XRD pattern of SnO<sub>2</sub>.</p> <strong style='display: block; margin-top: 10px; font-size: 18px;'><a style='color: #fff' href='/2227-9040/12/11/238'>Full article</a></strong> "></a><a href="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00238/article_deploy/html/images/chemosensors-12-00238-g003-550.jpg?1731750847" title=" <strong>Figure 3</strong><br/> <p>TEM image of SnO<sub>2</sub> (<b>a</b>) and the corresponding SAED pattern, revealing the tetragonal structure of SnO<sub>2</sub> (<b>b</b>).</p> <strong style='display: block; margin-top: 10px; font-size: 18px;'><a style='color: #fff' href='/2227-9040/12/11/238'>Full article</a></strong> "></a><a href="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00238/article_deploy/html/images/chemosensors-12-00238-g004-550.jpg?1731750852" title=" <strong>Figure 4</strong><br/> <p>HRTEM images showing faceted nanoparticles having different dimensions.</p> <strong style='display: block; margin-top: 10px; font-size: 18px;'><a style='color: #fff' href='/2227-9040/12/11/238'>Full article</a></strong> "></a><a href="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00238/article_deploy/html/images/chemosensors-12-00238-g005-550.jpg?1731750852" title=" <strong>Figure 5</strong><br/> <p>SnO<sub>2</sub> nanoparticles size distribution histogram fitted using a log-normal function.</p> <strong style='display: block; margin-top: 10px; font-size: 18px;'><a style='color: #fff' href='/2227-9040/12/11/238'>Full article</a></strong> "></a><a href="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00238/article_deploy/html/images/chemosensors-12-00238-g006-550.jpg?1731750854" title=" <strong>Figure 6</strong><br/> <p>The dependence of the sensor signal on the operating temperature (<b>a</b>), the behaviour of the electrical resistance in the atmosphere with variable RH and CO<sub>2</sub> concentrations for an operating temperature of 350 °C (<b>b</b>), and the sensor signal to CO<sub>2</sub> for SnO<sub>2</sub> 100 µm versus SnO<sub>2</sub> 30 µm (<b>c</b>,<b>d</b>).</p> <strong style='display: block; margin-top: 10px; font-size: 18px;'><a style='color: #fff' href='/2227-9040/12/11/238'>Full article</a></strong> "></a><a href="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00238/article_deploy/html/images/chemosensors-12-00238-g007-550.jpg?1731750856" title=" <strong>Figure 7</strong><br/> <p>CO<sub>2</sub> influence over the potential changes: SnO<sub>2</sub> 100 µm (<b>a</b>) and SnO<sub>2</sub> 30 µm (<b>b</b>) for T<sub>op</sub> = 350 °C and 50% RH.</p> <strong style='display: block; margin-top: 10px; font-size: 18px;'><a style='color: #fff' href='/2227-9040/12/11/238'>Full article</a></strong> "></a><a href="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00238/article_deploy/html/images/chemosensors-12-00238-g008-550.jpg?1731750857" title=" <strong>Figure 8</strong><br/> <p>Schematic representation of the sensitive structure based on SnO<sub>2</sub> deposited on a substrate with Pt electrodes with different interdigital gaps L (<b>a</b>), energy band bending (<b>b</b>), and the equivalent electrical circuit (<b>c</b>).</p> <strong style='display: block; margin-top: 10px; font-size: 18px;'><a style='color: #fff' href='/2227-9040/12/11/238'>Full article</a></strong> "></a><a href="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00238/article_deploy/html/images/chemosensors-12-00238-g009-550.jpg?1731750857" title=" <strong>Figure 9</strong><br/> <p>Planar substrate sensor overview. Side a represents the Pt heater meander (<b>a</b>) and sensor components parts (<b>b</b>); Side b1 represents the interdigital electrodes with a 100 μm gap (<b>c</b>); Side b2 represents the interdigital electrodes with a 30 μm gap (<b>d</b>) and a cross-section of the sensor (<b>e</b>).</p> <strong style='display: block; margin-top: 10px; font-size: 18px;'><a style='color: #fff' href='/2227-9040/12/11/238'>Full article</a></strong> "></a></div> </div> </div> <div class="generic-item article-item"> <input class="article-list-checkbox export-element" type="checkbox" name="articles_ids[]" value="1522308" data-select-all-name="article-listing"> <div class="article-content"> <div class="label right label__btn"> <span style="font-size: 12px; color: #1a1a1a;"> 18 pages, 3344 KiB   </span> <a href="/2227-9040/12/11/237/pdf?version=1731912788" class="UD_Listings_ArticlePDF" title="Article PDF" data-name="Low-Cost Electrochemical Determination of L-Ascorbic Acid Using Screen-Printed Electrodes and Development of an Electronic Tongue for Juice Analysis" data-journal="chemosensors"> <i class="material-icons custom-download"></i> </a> </div> <div class="article-icons"><span class="label openaccess" data-dropdown="drop-article-label-openaccess" aria-expanded="false">Open Access</span><span class="label articletype">Article</span></div> <a class="title-link" href="/2227-9040/12/11/237">Low-Cost Electrochemical Determination of L-Ascorbic Acid Using Screen-Printed Electrodes and Development of an Electronic Tongue for Juice Analysis</a> <div class="authors"> by <span class="inlineblock "><strong>Laila El Anzi</strong>, </span><span class="inlineblock "><strong>María Soledad García</strong>, </span><span class="inlineblock "><strong>Eduardo Laborda</strong>, </span><span class="inlineblock "><strong>Alberto Ruiz</strong> and </span><span class="inlineblock "><strong>Joaquín Ángel Ortuño</strong></span> </div> <div class="color-grey-dark"> <em>Chemosensors</em> <b>2024</b>, <em>12</em>(11), 237; <a href="https://doi.org/10.3390/chemosensors12110237">https://doi.org/10.3390/chemosensors12110237</a> - 16 Nov 2024 </div> Viewed by 311 <div class="abstract-div"> <a href="#" onclick="$(this).next('.abstract-cropped').toggleClass('inline').next('.abstract-full').toggleClass('inline'); return false;"> <strong>Abstract </strong> </a> <div class="abstract-cropped inline"> Low-cost electrochemical methodologies for the determination of L-ascorbic acid (vitamin C) and the analysis of juices are developed based on its electro-oxidation on carbon screen-printed electrodes. A novel chronoamperometric methodology is developed for the quantification of L-ascorbic acid in fruit juices. The proposed <a href="#" data-counterslink = "https://www.mdpi.com/2227-9040/12/11/237/more" onclick="$(this).parents('.abstract-cropped').toggleClass('inline').next('.abstract-full').toggleClass('inline'); return false;"> [...] Read more.</a> </div> <div class="abstract-full "> Low-cost electrochemical methodologies for the determination of L-ascorbic acid (vitamin C) and the analysis of juices are developed based on its electro-oxidation on carbon screen-printed electrodes. A novel chronoamperometric methodology is developed for the quantification of L-ascorbic acid in fruit juices. The proposed method stands out for its simplicity and rapidity, demonstrating its efficacy in determining L-ascorbic acid content in various fruit juices. Notably, the results obtained with this chronoamperometric approach are compared with those yielded by chromatography, with no significant differences between the two methods being found. Additionally, an electronic tongue is developed for the differentiation of juices based on the square wave voltammetric signals. <a href="/2227-9040/12/11/237">Full article</a> </div> </div> <div class="belongsTo" style="margin-bottom: 10px;"> (This article belongs to the Special Issue <a href=" /journal/chemosensors/special_issues/C6NWU06KJ3 ">Low-Cost Chemosenors for Applications in Environment, Health, Food, and Industry Process Control</a>)<br/> </div> <a href="#" class="abstract-figures-show" data-counterslink = "https://www.mdpi.com/2227-9040/12/11/237/show" ><span >►</span><span style=" display: none;">▼</span> Show Figures </a><div class="abstract-image-preview "><div class="arrow left-arrow" id="prev1522308"><i class="fa fa-caret-left"></i></div><div class="arrow right-arrow" id="next1522308"><i class="fa fa-caret-right"></i></div><div class="absgraph cycle-slideshow manual" data-cycle-fx="scrollHorz" data-cycle-timeout="0" data-cycle-next="#next1522308" data-cycle-prev="#prev1522308" data-cycle-progressive="#images1522308" data-cycle-slides=">div" data-cycle-log="false"><div class='openpopupgallery cycle-slide' data-imgindex='0' data-target='article-1522308-popup'><span class="helper"></span><img src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=" data-src="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00237/article_deploy/html/images/chemosensors-12-00237-g001-550.jpg?1731912898" alt="" style="border: 0;"><p>Figure 1</p></div><script id="images1522308" type="text/cycle" data-cycle-split="---"><div class='openpopupgallery' data-imgindex='1' data-target='article-1522308-popup'><span class="helper"></span><img src='https://pub.mdpi-res.com/chemosensors/chemosensors-12-00237/article_deploy/html/images/chemosensors-12-00237-g002-550.jpg?1731912900'><p>Figure 2</p></div> --- <div class='openpopupgallery' data-imgindex='2' data-target='article-1522308-popup'><span class="helper"></span><img src='https://pub.mdpi-res.com/chemosensors/chemosensors-12-00237/article_deploy/html/images/chemosensors-12-00237-g003-550.jpg?1731912902'><p>Figure 3</p></div> --- <div class='openpopupgallery' data-imgindex='3' data-target='article-1522308-popup'><span class="helper"></span><img src='https://pub.mdpi-res.com/chemosensors/chemosensors-12-00237/article_deploy/html/images/chemosensors-12-00237-g004-550.jpg?1731912903'><p>Figure 4</p></div> --- <div class='openpopupgallery' data-imgindex='4' data-target='article-1522308-popup'><span class="helper"></span><img src='https://pub.mdpi-res.com/chemosensors/chemosensors-12-00237/article_deploy/html/images/chemosensors-12-00237-g005-550.jpg?1731912904'><p>Figure 5</p></div> --- <div class='openpopupgallery' data-imgindex='5' data-target='article-1522308-popup'><span class="helper"></span><img src='https://pub.mdpi-res.com/chemosensors/chemosensors-12-00237/article_deploy/html/images/chemosensors-12-00237-g006-550.jpg?1731912909'><p>Figure 6</p></div> --- <div class='openpopupgallery' data-imgindex='6' data-target='article-1522308-popup'><span class="helper"></span><img src='https://pub.mdpi-res.com/chemosensors/chemosensors-12-00237/article_deploy/html/images/chemosensors-12-00237-g007-550.jpg?1731912910'><p>Figure 7</p></div> --- <div class='openpopupgallery' data-imgindex='7' data-target='article-1522308-popup'><span class="helper"></span><img src='https://pub.mdpi-res.com/chemosensors/chemosensors-12-00237/article_deploy/html/images/chemosensors-12-00237-g008-550.jpg?1731912911'><p>Figure 8</p></div> --- <div class='openpopupgallery' data-imgindex='8' data-target='article-1522308-popup'><span class="helper"></span><img src='https://pub.mdpi-res.com/chemosensors/chemosensors-12-00237/article_deploy/html/images/chemosensors-12-00237-g009-550.jpg?1731912912'><p>Figure 9</p></div> --- <div class='openpopupgallery' data-imgindex='9' data-target='article-1522308-popup'><span class="helper"></span><img src='https://pub.mdpi-res.com/chemosensors/chemosensors-12-00237/article_deploy/html/images/chemosensors-12-00237-g010-550.jpg?1731912914'><p>Figure 10</p></div> --- <div class='openpopupgallery' data-imgindex='10' data-target='article-1522308-popup'><span class="helper"></span><img src='https://pub.mdpi-res.com/chemosensors/chemosensors-12-00237/article_deploy/html/images/chemosensors-12-00237-g011-550.jpg?1731912915'><p>Figure 11</p></div></script></div></div><div id="article-1522308-popup" class="popupgallery" style="display: inline; line-height: 200%"><a href="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00237/article_deploy/html/images/chemosensors-12-00237-g001-550.jpg?1731912898" title=" <strong>Figure 1</strong><br/> <p>(<b>A</b>) Experimental background-subtracted current–time curves obtained with 2 × 10<sup>−4</sup> M L-AA, 0.1 M KCl solution and (<b>B</b>) their log-transformation for different applied potentials: <span class="html-italic">E</span> (V) = 0 (black curve); 0.1 (red curve); 0.2 (dark blue curve); 0.3 (light green curve); 0.4 (blue curve); 0.5 (pink curve); 0.6 (dark green curve); and 0.7 (grey curve).</p> <strong style='display: block; margin-top: 10px; font-size: 18px;'><a style='color: #fff' href='/2227-9040/12/11/237'>Full article</a></strong> "></a><a href="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00237/article_deploy/html/images/chemosensors-12-00237-g002-550.jpg?1731912900" title=" <strong>Figure 2</strong><br/> <p>(<b>A</b>) Experimental background-subtracted normalized current–potential curves obtained with 2 × 10<sup>−4</sup> M L-AA, 0.1 M KCl solution (points) and best-fit sigmoid curves (solid lines) for different pulse times: <span class="html-italic">t</span> (s) = 0.4 (black); 0.6 (red); 1 (green); 2 (blue); 5 (pink); and 10 (light blue). Inset: Experimental background-subtracted current–potential curves before normalization. (<b>B</b>) Variation of the experimental half-wave potential, <math display="inline"><semantics> <mrow> <msub> <mrow> <mi>E</mi> </mrow> <mrow> <mn>1</mn> <mo>/</mo> <mn>2</mn> </mrow> </msub> </mrow> </semantics></math> (black points), and <math display="inline"><semantics> <mrow> <mfenced open="|" close="|" separators="|"> <mrow> <msub> <mrow> <mi>E</mi> </mrow> <mrow> <mn>3</mn> <mo>/</mo> <mn>4</mn> </mrow> </msub> <mo>−</mo> <msub> <mrow> <mi>E</mi> </mrow> <mrow> <mn>1</mn> <mo>/</mo> <mn>4</mn> </mrow> </msub> </mrow> </mfenced> </mrow> </semantics></math> (red points) with the pulse time.</p> <strong style='display: block; margin-top: 10px; font-size: 18px;'><a style='color: #fff' href='/2227-9040/12/11/237'>Full article</a></strong> "></a><a href="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00237/article_deploy/html/images/chemosensors-12-00237-g003-550.jpg?1731912902" title=" <strong>Figure 3</strong><br/> <p>Chronoamperometric current–time signal at <span class="html-italic">E</span> = 0.5 V for different concentrations of L-AA in 0.1 M KCl, 0 M (yellow); 2 × 10<sup>−5</sup> M (black); 5 × 10<sup>−5</sup> M (green); 1 × 10<sup>−4</sup> M (red); 2 × 10<sup>−4</sup> M (blue); 5 × 10<sup>−4</sup> M (pink); 1 × 10<sup>−3</sup> M (purple).</p> <strong style='display: block; margin-top: 10px; font-size: 18px;'><a style='color: #fff' href='/2227-9040/12/11/237'>Full article</a></strong> "></a><a href="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00237/article_deploy/html/images/chemosensors-12-00237-g004-550.jpg?1731912903" title=" <strong>Figure 4</strong><br/> <p>Calibration plot for the chronoamperometric determination of L-AA.</p> <strong style='display: block; margin-top: 10px; font-size: 18px;'><a style='color: #fff' href='/2227-9040/12/11/237'>Full article</a></strong> "></a><a href="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00237/article_deploy/html/images/chemosensors-12-00237-g005-550.jpg?1731912904" title=" <strong>Figure 5</strong><br/> <p>Current values for 0.1 M KCl (Blank) and for 4 × 10<sup>−5</sup> M L-AA in 0.1 M KCl, obtained with different SPEs: A, B, and C. Error bars correspond to the confidence intervals at 95% level for three determinations.</p> <strong style='display: block; margin-top: 10px; font-size: 18px;'><a style='color: #fff' href='/2227-9040/12/11/237'>Full article</a></strong> "></a><a href="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00237/article_deploy/html/images/chemosensors-12-00237-g006-550.jpg?1731912909" title=" <strong>Figure 6</strong><br/> <p>Square wave voltammograms of the different juices (three repeats).</p> <strong style='display: block; margin-top: 10px; font-size: 18px;'><a style='color: #fff' href='/2227-9040/12/11/237'>Full article</a></strong> "></a><a href="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00237/article_deploy/html/images/chemosensors-12-00237-g007-550.jpg?1731912910" title=" <strong>Figure 7</strong><br/> <p>Background-subtracted chronoamperograms obtained for the juice from pineapple, apple, and grape (Brand 2) diluted 1:50 with 0.1 M KCl for different applied potentials: <span class="html-italic">E</span> (V) = 0 (black curve); 0.1 (red curve); 0.2 (dark blue curve); 0.3 (light green curve); 0.4 (blue curve); 0.5 (pink curve); 0.6 (dark green curve); 0.7 (grey curve); 0.8 (dark red curve); 0.9 (yellow curve); and 1.0 (light blue curve).</p> <strong style='display: block; margin-top: 10px; font-size: 18px;'><a style='color: #fff' href='/2227-9040/12/11/237'>Full article</a></strong> "></a><a href="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00237/article_deploy/html/images/chemosensors-12-00237-g008-550.jpg?1731912911" title=" <strong>Figure 8</strong><br/> <p>Normalized current–potential curve of diluted juice (red) and 8 × 10<sup>−5</sup> M L-AA (black), both in 0.1 M KCl. Inset: Experimental background-subtracted current–potential curves before normalization.</p> <strong style='display: block; margin-top: 10px; font-size: 18px;'><a style='color: #fff' href='/2227-9040/12/11/237'>Full article</a></strong> "></a><a href="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00237/article_deploy/html/images/chemosensors-12-00237-g009-550.jpg?1731912912" title=" <strong>Figure 9</strong><br/> <p>Chronoamperometric records of current–time of three tested juices. A, orange juice (Brand 1); B, orange juice (Brand 3); and C, apple juice (Brand 1).</p> <strong style='display: block; margin-top: 10px; font-size: 18px;'><a style='color: #fff' href='/2227-9040/12/11/237'>Full article</a></strong> "></a><a href="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00237/article_deploy/html/images/chemosensors-12-00237-g010-550.jpg?1731912914" title=" <strong>Figure 10</strong><br/> <p>Plot of the L-AA content obtained by the chronoamperometric method (ChA) versus those obtained by the HPLC method. Error bars: mean ± standard deviation.</p> <strong style='display: block; margin-top: 10px; font-size: 18px;'><a style='color: #fff' href='/2227-9040/12/11/237'>Full article</a></strong> "></a><a href="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00237/article_deploy/html/images/chemosensors-12-00237-g011-550.jpg?1731912915" title=" <strong>Figure 11</strong><br/> <p>PCA score plot of the square wave voltammetric dataset of the different juices analyzed.</p> <strong style='display: block; margin-top: 10px; font-size: 18px;'><a style='color: #fff' href='/2227-9040/12/11/237'>Full article</a></strong> "></a></div> </div> </div> <div class="generic-item article-item"> <input class="article-list-checkbox export-element" type="checkbox" name="articles_ids[]" value="1519797" data-select-all-name="article-listing"> <div class="article-content"> <div class="label right label__btn"> <span style="font-size: 12px; color: #1a1a1a;"> 20 pages, 2452 KiB   </span> <a href="/2227-9040/12/11/236/pdf?version=1731665644" class="UD_Listings_ArticlePDF" title="Article PDF" data-name="Functional Organic Electrochemical Transistor-Based Biosensors for Biomedical Applications" data-journal="chemosensors"> <i class="material-icons custom-download"></i> </a> </div> <div class="article-icons"><span class="label openaccess" data-dropdown="drop-article-label-openaccess" aria-expanded="false">Open Access</span><span class="label articletype">Review</span></div> <a class="title-link" href="/2227-9040/12/11/236">Functional Organic Electrochemical Transistor-Based Biosensors for Biomedical Applications</a> <div class="authors"> by <span class="inlineblock "><strong>Zhiyao Wang</strong>, </span><span class="inlineblock "><strong>Minggao Liu</strong>, </span><span class="inlineblock "><strong>Yundi Zhao</strong>, </span><span class="inlineblock "><strong>Yating Chen</strong>, </span><span class="inlineblock "><strong>Beenish Noureen</strong>, </span><span class="inlineblock "><strong>Liping Du</strong> and </span><span class="inlineblock "><strong>Chunsheng Wu</strong></span> </div> <div class="color-grey-dark"> <em>Chemosensors</em> <b>2024</b>, <em>12</em>(11), 236; <a href="https://doi.org/10.3390/chemosensors12110236">https://doi.org/10.3390/chemosensors12110236</a> - 13 Nov 2024 </div> Viewed by 637 <div class="abstract-div"> <a href="#" onclick="$(this).next('.abstract-cropped').toggleClass('inline').next('.abstract-full').toggleClass('inline'); return false;"> <strong>Abstract </strong> </a> <div class="abstract-cropped inline"> Organic electrochemical transistors (OECTs), as an emerging device for the development of novel biosensors, have attracted more and more attention in recent years, demonstrating their promising prospects and commercial potential. Functional OECTs have been widely applied in the field of biosensors due to <a href="#" data-counterslink = "https://www.mdpi.com/2227-9040/12/11/236/more" onclick="$(this).parents('.abstract-cropped').toggleClass('inline').next('.abstract-full').toggleClass('inline'); return false;"> [...] Read more.</a> </div> <div class="abstract-full "> Organic electrochemical transistors (OECTs), as an emerging device for the development of novel biosensors, have attracted more and more attention in recent years, demonstrating their promising prospects and commercial potential. Functional OECTs have been widely applied in the field of biosensors due to their decisive advantages, such as high transconductance, easy functionalization, and high integration capability. Therefore, this review aims to provide a comprehensive summary of the most recent advances in the application of functional OECT-based biosensors in biomedicine, especially focusing on those biosensors for the detection of physiological and biochemical parameters that are critical for the health of human beings. First, the main components and basic working principles of OECTs will be briefly introduced. In the following, the strategies and key technologies for the preparation of functional OECT-based biosensors will be outlined and discussed with regard to the applications of the detection of various targets, including metabolites, ions, neurotransmitters, electrophysiological parameters, and immunological molecules. Finally, the current main issues and future development trends of functional OECT-based biosensors will be proposed and discussed. The breakthrough in functional OECT-based biosensors is believed to enable such devices to achieve higher performance, and thus, this technology could provide new insight into the future field of medical and life sciences. <a href="/2227-9040/12/11/236">Full article</a> </div> </div> <div class="belongsTo" style="margin-bottom: 10px;"> (This article belongs to the Special Issue <a href=" /journal/chemosensors/special_issues/Z4OEUYTHPZ ">Advancements of Chemical and Biosensors in China—2nd Edition</a>)<br/> </div> <a href="#" class="abstract-figures-show" data-counterslink = "https://www.mdpi.com/2227-9040/12/11/236/show" ><span >►</span><span style=" display: none;">▼</span> Show Figures </a><div class="abstract-image-preview "><div class="arrow left-arrow" id="prev1519797"><i class="fa fa-caret-left"></i></div><div class="arrow right-arrow" id="next1519797"><i class="fa fa-caret-right"></i></div><div class="absgraph cycle-slideshow manual" data-cycle-fx="scrollHorz" data-cycle-timeout="0" data-cycle-next="#next1519797" data-cycle-prev="#prev1519797" data-cycle-progressive="#images1519797" data-cycle-slides=">div" data-cycle-log="false"><div class='openpopupgallery cycle-slide' data-imgindex='0' data-target='article-1519797-popup'><span class="helper"></span><img src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=" data-src="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00236/article_deploy/html/images/chemosensors-12-00236-g001-550.jpg?1731665782" alt="" style="border: 0;"><p>Figure 1</p></div><script id="images1519797" type="text/cycle" data-cycle-split="---"><div class='openpopupgallery' data-imgindex='1' data-target='article-1519797-popup'><span class="helper"></span><img src='https://pub.mdpi-res.com/chemosensors/chemosensors-12-00236/article_deploy/html/images/chemosensors-12-00236-g002-550.jpg?1731665784'><p>Figure 2</p></div> --- <div class='openpopupgallery' data-imgindex='2' data-target='article-1519797-popup'><span class="helper"></span><img src='https://pub.mdpi-res.com/chemosensors/chemosensors-12-00236/article_deploy/html/images/chemosensors-12-00236-g003-550.jpg?1731665785'><p>Figure 3</p></div> --- <div class='openpopupgallery' data-imgindex='3' data-target='article-1519797-popup'><span class="helper"></span><img src='https://pub.mdpi-res.com/chemosensors/chemosensors-12-00236/article_deploy/html/images/chemosensors-12-00236-g004-550.jpg?1731665787'><p>Figure 4</p></div> --- <div class='openpopupgallery' data-imgindex='4' data-target='article-1519797-popup'><span class="helper"></span><img src='https://pub.mdpi-res.com/chemosensors/chemosensors-12-00236/article_deploy/html/images/chemosensors-12-00236-g005-550.jpg?1731665789'><p>Figure 5</p></div></script></div></div><div id="article-1519797-popup" class="popupgallery" style="display: inline; line-height: 200%"><a href="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00236/article_deploy/html/images/chemosensors-12-00236-g001-550.jpg?1731665782" title=" <strong>Figure 1</strong><br/> <p>Schematic diagram showing the development of various functional OECTs with various OMIECs towards different applications.</p> <strong style='display: block; margin-top: 10px; font-size: 18px;'><a style='color: #fff' href='/2227-9040/12/11/236'>Full article</a></strong> "></a><a href="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00236/article_deploy/html/images/chemosensors-12-00236-g002-550.jpg?1731665784" title=" <strong>Figure 2</strong><br/> <p>Schematics of structure and principle of OECT for in vitro bioelectronics. (<b>a</b>) A common cross-sectional schematic diagram of OECT [<a href="#B34-chemosensors-12-00236" class="html-bibr">34</a>]. (<b>b</b>) Transfer curve of depletion mode OECT. At <span class="html-italic">V<sub>G</sub></span> = 0 V, the transistor conducts and high current flows in the channel, as the channel is prepared using doped conductive polymers. When <span class="html-italic">V<sub>G</sub></span> is applied, electrolyte cations replace polymer holes, ultimately shutting down the transistor. (<b>c</b>) The transfer curve of cumulative mode OECT. At <span class="html-italic">V<sub>G</sub></span> = 0 V, the transistor is turned off and a small current flows in the channel because it is prepared using a polymer with poor conductivity. When <span class="html-italic">V<sub>G</sub></span> is applied, electrolyte anions are injected into the channel, which causes the transistor to conduct [<a href="#B33-chemosensors-12-00236" class="html-bibr">33</a>]. (<b>d</b>) Functionalized PEDOT:PSS electrodes serve as WE for 3-e and 2-e systems (top and middle, respectively) and as gate electrodes for OECT (bottom) [<a href="#B35-chemosensors-12-00236" class="html-bibr">35</a>].</p> <strong style='display: block; margin-top: 10px; font-size: 18px;'><a style='color: #fff' href='/2227-9040/12/11/236'>Full article</a></strong> "></a><a href="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00236/article_deploy/html/images/chemosensors-12-00236-g003-550.jpg?1731665785" title=" <strong>Figure 3</strong><br/> <p>(<b>a</b>) Schematic diagram of electrochemical gating in pH sensor with additional gold orbitals in contact with sensing layer. (<b>b</b>) Experimental setup for studying sensing mechanism [<a href="#B94-chemosensors-12-00236" class="html-bibr">94</a>].</p> <strong style='display: block; margin-top: 10px; font-size: 18px;'><a style='color: #fff' href='/2227-9040/12/11/236'>Full article</a></strong> "></a><a href="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00236/article_deploy/html/images/chemosensors-12-00236-g004-550.jpg?1731665787" title=" <strong>Figure 4</strong><br/> <p>(<b>a</b>) Schematic diagram showing the structure and basic principle of organic photoelectrochemical transistor (OPECT)-based biosensors. (<b>b</b>) Output curves under different conditions. (<b>c</b>) Transfer curve under illumination conditions. (<b>d</b>) The transmission curve in the dark [<a href="#B115-chemosensors-12-00236" class="html-bibr">115</a>].</p> <strong style='display: block; margin-top: 10px; font-size: 18px;'><a style='color: #fff' href='/2227-9040/12/11/236'>Full article</a></strong> "></a><a href="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00236/article_deploy/html/images/chemosensors-12-00236-g005-550.jpg?1731665789" title=" <strong>Figure 5</strong><br/> <p>(<b>a</b>) Schematic diagram of the structure of the OECT-based biosensor. PEDOT:PSS is patterned as an active layer on a bioabsorbable PLGA film, in contact with the gold source and drain electrodes. This structure is gate-controlled by the electron potential applied to the aqueous electrolyte through a metal wire. (<b>b</b>) The photo of the device shows the transparency and flexibility attached to human skin. (<b>c</b>) Experimental wiring diagram. (<b>d</b>) The drain current trace (red) measured during electrocardiogram recording (<span class="html-italic">V<sub>SG</sub></span> = 0.5 V, <span class="html-italic">V<sub>SD</sub></span> = −0.3 V) was compared with the normal potential record using standard disposable leads (black) [<a href="#B47-chemosensors-12-00236" class="html-bibr">47</a>].</p> <strong style='display: block; margin-top: 10px; font-size: 18px;'><a style='color: #fff' href='/2227-9040/12/11/236'>Full article</a></strong> "></a></div> </div> </div> <div class="generic-item article-item"> <input class="article-list-checkbox export-element" type="checkbox" name="articles_ids[]" value="1519701" data-select-all-name="article-listing"> <div class="article-content"> <div class="label right label__btn"> <span style="font-size: 12px; color: #1a1a1a;"> 22 pages, 1683 KiB   </span> <a href="/2227-9040/12/11/235/pdf?version=1731485609" class="UD_Listings_ArticlePDF" title="Article PDF" data-name="Algal Biosensors for Detection of Potentially Toxic Pollutants and Validation by Advanced Methods: A Brief Review" data-journal="chemosensors"> <i class="material-icons custom-download"></i> </a> </div> <div class="article-icons"><span class="label openaccess" data-dropdown="drop-article-label-openaccess" aria-expanded="false">Open Access</span><span class="label articletype">Review</span></div> <a class="title-link" href="/2227-9040/12/11/235">Algal Biosensors for Detection of Potentially Toxic Pollutants and Validation by Advanced Methods: A Brief Review</a> <div class="authors"> by <span class="inlineblock "><strong>Diego Serrasol do Amaral</strong>, </span><span class="inlineblock "><strong>Luana Vaz Tholozan</strong>, </span><span class="inlineblock "><strong>Daisa Hakbart Bonemann</strong>, </span><span class="inlineblock "><strong>Cristina Jansen-Alves</strong>, </span><span class="inlineblock "><strong>Wiliam Boschetti</strong>, </span><span class="inlineblock "><strong>Diogo La Rosa Novo</strong>, </span><span class="inlineblock "><strong>Neftali Lenin Villarreal Carreno</strong> and </span><span class="inlineblock "><strong>Claudio Martin Pereira de Pereira</strong></span> </div> <div class="color-grey-dark"> <em>Chemosensors</em> <b>2024</b>, <em>12</em>(11), 235; <a href="https://doi.org/10.3390/chemosensors12110235">https://doi.org/10.3390/chemosensors12110235</a> - 13 Nov 2024 </div> Viewed by 579 <div class="abstract-div"> <a href="#" onclick="$(this).next('.abstract-cropped').toggleClass('inline').next('.abstract-full').toggleClass('inline'); return false;"> <strong>Abstract </strong> </a> <div class="abstract-cropped inline"> The presence of potentially toxic pollutants, such as pesticides and metal ions, even at low concentrations, can significantly impact aquatic environmental health. This pollution is a globally widespread problem and requires fast and reliable analysis, especially for in-situ identification/quantification. Atomic absorption spectrometry and <a href="#" data-counterslink = "https://www.mdpi.com/2227-9040/12/11/235/more" onclick="$(this).parents('.abstract-cropped').toggleClass('inline').next('.abstract-full').toggleClass('inline'); return false;"> [...] Read more.</a> </div> <div class="abstract-full "> The presence of potentially toxic pollutants, such as pesticides and metal ions, even at low concentrations, can significantly impact aquatic environmental health. This pollution is a globally widespread problem and requires fast and reliable analysis, especially for in-situ identification/quantification. Atomic absorption spectrometry and plasma-based spectrometry techniques have been considered the most analytical tools used to monitor potentially toxic metal ions in aquatic media and other related matrices. The dynamics of global climate change and its correlation with pollution, especially from anthropogenic sources, have encouraged the development of other faster analytical tools for monitoring these pollutants. A noteworthy alternative for determining potentially toxic pollutants is using algae-based biosensors, resulting in a cost reduction and simplification of environmental analysis, enabling a more reliable comprehension of the role of humans in climate change. These biosensors, which may not have the highest sensitivity in quantification, have demonstrated remarkable potential in the identification of potentially toxic pollutants and several field applications. Biosensors can be an excellent biotechnology solution for monitoring global environmental changes. Thus, this review highlights the main advances in developing and comparing algae-based biosensors and other analytical possibilities for the identification of potentially toxic pollutants and their possible applications in environmental analysis. <a href="/2227-9040/12/11/235">Full article</a> </div> </div> <div class="belongsTo" style="margin-bottom: 10px;"> (This article belongs to the Collection <a href=" /journal/chemosensors/topical_collections/ph_sens_bio_sys ">pH Sensors, Biosensors and Systems</a>)<br/> </div> <a href="#" class="abstract-figures-show" data-counterslink = "https://www.mdpi.com/2227-9040/12/11/235/show" ><span >►</span><span style=" display: none;">▼</span> Show Figures </a><div class="abstract-image-preview "><div class="arrow left-arrow" id="prev1519701"><i class="fa fa-caret-left"></i></div><div class="arrow right-arrow" id="next1519701"><i class="fa fa-caret-right"></i></div><div class="absgraph cycle-slideshow manual" data-cycle-fx="scrollHorz" data-cycle-timeout="0" data-cycle-next="#next1519701" data-cycle-prev="#prev1519701" data-cycle-progressive="#images1519701" data-cycle-slides=">div" data-cycle-log="false"><div class='openpopupgallery cycle-slide' data-imgindex='0' data-target='article-1519701-popup'><span class="helper"></span><img src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=" data-src="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00235/article_deploy/html/images/chemosensors-12-00235-g001-550.jpg?1731485750" alt="" style="border: 0;"><p>Figure 1</p></div><script id="images1519701" type="text/cycle" data-cycle-split="---"><div class='openpopupgallery' data-imgindex='1' data-target='article-1519701-popup'><span class="helper"></span><img src='https://pub.mdpi-res.com/chemosensors/chemosensors-12-00235/article_deploy/html/images/chemosensors-12-00235-g002-550.jpg?1731485752'><p>Figure 2</p></div> --- <div class='openpopupgallery' data-imgindex='2' data-target='article-1519701-popup'><span class="helper"></span><img src='https://pub.mdpi-res.com/chemosensors/chemosensors-12-00235/article_deploy/html/images/chemosensors-12-00235-g003-550.jpg?1731485753'><p>Figure 3</p></div> --- <div class='openpopupgallery' data-imgindex='3' data-target='article-1519701-popup'><span class="helper"></span><img src='https://pub.mdpi-res.com/chemosensors/chemosensors-12-00235/article_deploy/html/images/chemosensors-12-00235-g004-550.jpg?1731485755'><p>Figure 4</p></div></script></div></div><div id="article-1519701-popup" class="popupgallery" style="display: inline; line-height: 200%"><a href="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00235/article_deploy/html/images/chemosensors-12-00235-g001-550.jpg?1731485750" title=" <strong>Figure 1</strong><br/> <p>Biosensors based on algae and their applications. (<b>A</b>) Biosensor components. (<b>B</b>) Toxic elements. (<b>C</b>) Locals for in situ use biosensors based on algae.</p> <strong style='display: block; margin-top: 10px; font-size: 18px;'><a style='color: #fff' href='/2227-9040/12/11/235'>Full article</a></strong> "></a><a href="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00235/article_deploy/html/images/chemosensors-12-00235-g002-550.jpg?1731485752" title=" <strong>Figure 2</strong><br/> <p>Microalgae cell wall and its components (adapted [<a href="#B63-chemosensors-12-00235" class="html-bibr">63</a>]).</p> <strong style='display: block; margin-top: 10px; font-size: 18px;'><a style='color: #fff' href='/2227-9040/12/11/235'>Full article</a></strong> "></a><a href="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00235/article_deploy/html/images/chemosensors-12-00235-g003-550.jpg?1731485753" title=" <strong>Figure 3</strong><br/> <p>Chemical interaction between the algae and different contaminants.</p> <strong style='display: block; margin-top: 10px; font-size: 18px;'><a style='color: #fff' href='/2227-9040/12/11/235'>Full article</a></strong> "></a><a href="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00235/article_deploy/html/images/chemosensors-12-00235-g004-550.jpg?1731485755" title=" <strong>Figure 4</strong><br/> <p>Example of parameters analyzed by an algae-based biosensor.</p> <strong style='display: block; margin-top: 10px; font-size: 18px;'><a style='color: #fff' href='/2227-9040/12/11/235'>Full article</a></strong> "></a></div> </div> </div> <div class="generic-item article-item"> <input class="article-list-checkbox export-element" type="checkbox" name="articles_ids[]" value="1518648" data-select-all-name="article-listing"> <div class="article-content"> <div class="label right label__btn"> <span style="font-size: 12px; color: #1a1a1a;"> 45 pages, 9504 KiB   </span> <a href="/2227-9040/12/11/234/pdf?version=1731330159" class="UD_Listings_ArticlePDF" title="Article PDF" data-name="Nanomaterial-Based Electrochemical Sensors for the Detection of Pharmaceutical Drugs" data-journal="chemosensors"> <i class="material-icons custom-download"></i> </a> </div> <div class="article-icons"><span class="label openaccess" data-dropdown="drop-article-label-openaccess" aria-expanded="false">Open Access</span><span class="label articletype">Review</span></div> <a class="title-link" href="/2227-9040/12/11/234">Nanomaterial-Based Electrochemical Sensors for the Detection of Pharmaceutical Drugs</a> <div class="authors"> by <span class="inlineblock "><strong>Shweta J. Malode</strong>, </span><span class="inlineblock "><strong>Mohammed Ali Alshehri</strong> and </span><span class="inlineblock "><strong>Nagaraj P. Shetti</strong></span> </div> <div class="color-grey-dark"> <em>Chemosensors</em> <b>2024</b>, <em>12</em>(11), 234; <a href="https://doi.org/10.3390/chemosensors12110234">https://doi.org/10.3390/chemosensors12110234</a> - 11 Nov 2024 </div> Viewed by 1000 <div class="abstract-div"> <a href="#" onclick="$(this).next('.abstract-cropped').toggleClass('inline').next('.abstract-full').toggleClass('inline'); return false;"> <strong>Abstract </strong> </a> <div class="abstract-cropped inline"> The rapidly increasing human population has led to new biological and environmental challenges. These challenges, in turn, have contributed to the rapid growth of the pharmaceutical sector. Quality control in pharmaceutical manufacturing and drug delivery necessitates portable, sensitive, precise, and cost-effective devices to <a href="#" data-counterslink = "https://www.mdpi.com/2227-9040/12/11/234/more" onclick="$(this).parents('.abstract-cropped').toggleClass('inline').next('.abstract-full').toggleClass('inline'); return false;"> [...] Read more.</a> </div> <div class="abstract-full "> The rapidly increasing human population has led to new biological and environmental challenges. These challenges, in turn, have contributed to the rapid growth of the pharmaceutical sector. Quality control in pharmaceutical manufacturing and drug delivery necessitates portable, sensitive, precise, and cost-effective devices to monitor patient dosing and assess pharmaceutical hazards. This study highlights the attributes and applications of the current nanomaterial-based sensors for drug detection, emphasizing the potential of these devices to advance the detection of bioactive molecules, thereby promoting human health and environmental protection on a large scale. Electrochemical sensors, in particular, have become invaluable in bioimaging, electrochemical analysis, and drug delivery due to their high specificity, selectivity, and stability across cycles. This review focuses on recent advancements in electrochemical devices for healthcare applications, detailing their production, analytical performance, and clinical uses. <a href="/2227-9040/12/11/234">Full article</a> </div> </div> <div class="belongsTo" style="margin-bottom: 10px;"> (This article belongs to the Special Issue <a href=" /journal/chemosensors/special_issues/QIK79MF4R2 ">Feature Review Papers in Chemical/Bio-Sensors and Analytical Chemistry in 2024</a>)<br/> </div> <a href="#" class="abstract-figures-show" data-counterslink = "https://www.mdpi.com/2227-9040/12/11/234/show" ><span >►</span><span style=" display: none;">▼</span> Show Figures </a><div class="abstract-image-preview "><div class="arrow left-arrow" id="prev1518648"><i class="fa fa-caret-left"></i></div><div class="arrow right-arrow" id="next1518648"><i class="fa fa-caret-right"></i></div><div class="absgraph cycle-slideshow manual" data-cycle-fx="scrollHorz" data-cycle-timeout="0" data-cycle-next="#next1518648" data-cycle-prev="#prev1518648" data-cycle-progressive="#images1518648" data-cycle-slides=">div" data-cycle-log="false"><div class='openpopupgallery cycle-slide' data-imgindex='0' data-target='article-1518648-popup'><span class="helper"></span><img src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=" data-src="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00234/article_deploy/html/images/chemosensors-12-00234-ag-550.jpg?1731379120" alt="" style="border: 0;"><p>Graphical abstract</p></div><script id="images1518648" type="text/cycle" data-cycle-split="---"><div class='openpopupgallery' data-imgindex='1' data-target='article-1518648-popup'><span class="helper"></span><img src='https://pub.mdpi-res.com/chemosensors/chemosensors-12-00234/article_deploy/html/images/chemosensors-12-00234-g001-550.jpg?1731330223'><p>Figure 1</p></div> --- <div class='openpopupgallery' data-imgindex='2' data-target='article-1518648-popup'><span class="helper"></span><img src='https://pub.mdpi-res.com/chemosensors/chemosensors-12-00234/article_deploy/html/images/chemosensors-12-00234-g002-550.jpg?1731330224'><p>Figure 2</p></div> --- <div class='openpopupgallery' data-imgindex='3' data-target='article-1518648-popup'><span class="helper"></span><img src='https://pub.mdpi-res.com/chemosensors/chemosensors-12-00234/article_deploy/html/images/chemosensors-12-00234-g003-550.jpg?1731330226'><p>Figure 3</p></div> --- <div class='openpopupgallery' data-imgindex='4' data-target='article-1518648-popup'><span class="helper"></span><img src='https://pub.mdpi-res.com/chemosensors/chemosensors-12-00234/article_deploy/html/images/chemosensors-12-00234-g004-550.jpg?1731330229'><p>Figure 4</p></div> --- <div class='openpopupgallery' data-imgindex='5' data-target='article-1518648-popup'><span class="helper"></span><img src='https://pub.mdpi-res.com/chemosensors/chemosensors-12-00234/article_deploy/html/images/chemosensors-12-00234-g005-550.jpg?1731330231'><p>Figure 5</p></div> --- <div class='openpopupgallery' data-imgindex='6' data-target='article-1518648-popup'><span class="helper"></span><img src='https://pub.mdpi-res.com/chemosensors/chemosensors-12-00234/article_deploy/html/images/chemosensors-12-00234-g006-550.jpg?1731330234'><p>Figure 6</p></div> --- <div class='openpopupgallery' data-imgindex='7' data-target='article-1518648-popup'><span class="helper"></span><img src='https://pub.mdpi-res.com/chemosensors/chemosensors-12-00234/article_deploy/html/images/chemosensors-12-00234-g007-550.jpg?1731330237'><p>Figure 7</p></div> --- <div class='openpopupgallery' data-imgindex='8' data-target='article-1518648-popup'><span class="helper"></span><img src='https://pub.mdpi-res.com/chemosensors/chemosensors-12-00234/article_deploy/html/images/chemosensors-12-00234-g008-550.jpg?1731330239'><p>Figure 8</p></div></script></div></div><div id="article-1518648-popup" class="popupgallery" style="display: inline; line-height: 200%"><a href="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00234/article_deploy/html/images/chemosensors-12-00234-ag-550.jpg?1731379120" title=" <strong>Graphical abstract</strong><br/><strong style='display: block; margin-top: 10px; font-size: 18px;'><a style='color: #fff' href='/2227-9040/12/11/234'>Full article</a></strong> "></a><a href="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00234/article_deploy/html/images/chemosensors-12-00234-g001-550.jpg?1731330223" title=" <strong>Figure 1</strong><br/> <p>Electrochemical sensors and biosensors based on various nanostructured materials. Reproduced with permission from [<a href="#B42-chemosensors-12-00234" class="html-bibr">42</a>].</p> <strong style='display: block; margin-top: 10px; font-size: 18px;'><a style='color: #fff' href='/2227-9040/12/11/234'>Full article</a></strong> "></a><a href="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00234/article_deploy/html/images/chemosensors-12-00234-g002-550.jpg?1731330224" title=" <strong>Figure 2</strong><br/> <p>Electrocatalysts used for drug detection. Reproduced with permission from [<a href="#B109-chemosensors-12-00234" class="html-bibr">109</a>].</p> <strong style='display: block; margin-top: 10px; font-size: 18px;'><a style='color: #fff' href='/2227-9040/12/11/234'>Full article</a></strong> "></a><a href="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00234/article_deploy/html/images/chemosensors-12-00234-g003-550.jpg?1731330226" title=" <strong>Figure 3</strong><br/> <p>(<b>a</b>) Effects of the scan rate on the NPX CV curves produced for the PLS/GCE in PBS. (<b>b</b>) Effect of the pH on the NPX CV curves for the PLS/GCE in PBS. (<b>c</b>) The schematic of naproxen. Reproduced with permission from [<a href="#B151-chemosensors-12-00234" class="html-bibr">151</a>].</p> <strong style='display: block; margin-top: 10px; font-size: 18px;'><a style='color: #fff' href='/2227-9040/12/11/234'>Full article</a></strong> "></a><a href="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00234/article_deploy/html/images/chemosensors-12-00234-g004-550.jpg?1731330229" title=" <strong>Figure 4</strong><br/> <p><b>(a)</b> DPVs obtained for ibuprofen−spiked blood and urine samples. <b>(b)</b> CVs for IBU at Cu<sub>3</sub>TeO<sub>6</sub>−modified GCE (red) versus bare GCE (green). CVs of IBU at various scan rates ranging from 10 mV/s to 80 mV/s. The plot of current (I/μA) vs. square root of scan rate (υ/mV/s)<sup>1/2</sup>. The CVs of IBU at CuO/GCE (red), TeO<sub>2</sub>/GCE (yellow), Cu<sub>3</sub>TeO<sub>6</sub>/GCE (purple), and bare GCE (green). <b>(c)</b> Analysis of the Cu<sub>3</sub>TeO<sub>6</sub>−modified GCE for escalating IBU concentrations. DPVs generated for a 15 µM IBU solution in the presence of various interfering substances (THE, DA, UA, AA, NPX, GLU, CPZ). A bar graph illustrated I/μA for the interfering compounds, while a final bar graphs presented the stability of the electrode in terms of current over time and with respect to the number of storage days. Reproduced with permission from [<a href="#B155-chemosensors-12-00234" class="html-bibr">155</a>].</p> <strong style='display: block; margin-top: 10px; font-size: 18px;'><a style='color: #fff' href='/2227-9040/12/11/234'>Full article</a></strong> "></a><a href="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00234/article_deploy/html/images/chemosensors-12-00234-g005-550.jpg?1731330231" title=" <strong>Figure 5</strong><br/> <p>The cyclic voltammograms and Nyquist plots in (<b>A</b>) correlate to the undeveloped Au−SPE and the various MIP sensor development stages. (<b>B</b>) The table demonstrates that the percentages of O and C drop to 1.45% and 7.72% following the TRA extraction stage. (<b>C</b>) The electrodes’ AFM pictures. Reproduced with permission from [<a href="#B159-chemosensors-12-00234" class="html-bibr">159</a>].</p> <strong style='display: block; margin-top: 10px; font-size: 18px;'><a style='color: #fff' href='/2227-9040/12/11/234'>Full article</a></strong> "></a><a href="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00234/article_deploy/html/images/chemosensors-12-00234-g006-550.jpg?1731330234" title=" <strong>Figure 6</strong><br/> <p>(<b>a</b>) Schematic representation of Au−Pt multisegment nanowire array fabrication with immobilization of L−cysteine on Au segment and electroless plating of Au nanoparticles on Pt segment, followed by localization of penicillinase enzyme. (<b>b</b>) Penicillinase and penicillin sensing mechanisms; L−cysteine and tetracycline sensing mechanisms. CV scans of Au (L−cysteine) nanowire arrays sensing 100 μM tetracycline and Pt (penicillinase) nanowire arrays monitoring penicillin were conducted. (<b>c</b>) Evaluation of penicillin and tetracycline in samples employing multiple extracts. Reproduced with permission from [<a href="#B182-chemosensors-12-00234" class="html-bibr">182</a>].</p> <strong style='display: block; margin-top: 10px; font-size: 18px;'><a style='color: #fff' href='/2227-9040/12/11/234'>Full article</a></strong> "></a><a href="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00234/article_deploy/html/images/chemosensors-12-00234-g007-550.jpg?1731330237" title=" <strong>Figure 7</strong><br/> <p>(<b>A</b>) FT−IR spectra of Fe<sub>3</sub>O<sub>4</sub>, Fe<sub>3</sub>O<sub>4</sub>@SiO<sub>2</sub>, Fe<sub>3</sub>O<sub>4</sub>@SiO<sub>2</sub>@PA, and yolk−shell Fe<sub>3</sub>O<sub>4</sub>@PA. EDS, SEM, XPS, and TEM images of yolk−shell Fe<sub>3</sub>O<sub>4</sub>@PA−Ni@Pd. (<b>B</b>) CVs 10μmolL<sup>−1</sup> FLU and EIS in the presence of 10.0 mmolL<sup>−1</sup> [Fe(CN)<sub>6</sub>]<sup>3−/4−</sup> and 0.1 molL<sup>−1</sup> KCl solution. Reproduced with permission from [<a href="#B200-chemosensors-12-00234" class="html-bibr">200</a>].</p> <strong style='display: block; margin-top: 10px; font-size: 18px;'><a style='color: #fff' href='/2227-9040/12/11/234'>Full article</a></strong> "></a><a href="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00234/article_deploy/html/images/chemosensors-12-00234-g008-550.jpg?1731330239" title=" <strong>Figure 8</strong><br/> <p>(<b>A</b>) (<b>a</b>) XRD study of GOS/CaTiO<sub>3</sub> nanocomposite. (<b>b</b>) The polyhedral model’s orthorhombic CaTiO<sub>3</sub> crystal structure, (<b>c</b>) the space−filling model, and (<b>d</b>) the ball−and−stick model. (<b>B</b>) Flutamide electrochemical reduction mechanism. (<b>C</b>) (<b>a</b>) CV of flutamide−containing GOS/GCE, GOS/CaTiO<sub>3</sub> NC/GCE, and bare GCE. (<b>b</b>) Calibration plot. (<b>c</b>) Flutamide at GOS/CaTiO<sub>3</sub> NC/GCE with a varying scan rates. (<b>d</b>) Relationship between scan rate against the cathodic peak current. Reproduced with permission from [<a href="#B224-chemosensors-12-00234" class="html-bibr">224</a>].</p> <strong style='display: block; margin-top: 10px; font-size: 18px;'><a style='color: #fff' href='/2227-9040/12/11/234'>Full article</a></strong> "></a></div> </div> </div> <div class="generic-item article-item"> <input class="article-list-checkbox export-element" type="checkbox" name="articles_ids[]" value="1517404" data-select-all-name="article-listing"> <div class="article-content"> <div class="label right label__btn"> <span style="font-size: 12px; color: #1a1a1a;"> 18 pages, 4007 KiB   </span> <a href="/2227-9040/12/11/233/pdf?version=1731139108" class="UD_Listings_ArticlePDF" title="Article PDF" data-name="Development of a Chemical Sensor Device for Monitoring Hazardous Gases Generated in the Semiconductor Manufacturing Process" data-journal="chemosensors"> <i class="material-icons custom-download"></i> </a> </div> <div class="article-icons"><span class="label openaccess" data-dropdown="drop-article-label-openaccess" aria-expanded="false">Open Access</span><span class="label articletype">Review</span></div> <a class="title-link" href="/2227-9040/12/11/233">Development of a Chemical Sensor Device for Monitoring Hazardous Gases Generated in the Semiconductor Manufacturing Process</a> <div class="authors"> by <span class="inlineblock "><strong>My Thi Ngoc Nguyen</strong> and </span><span class="inlineblock "><strong>Jun Seop Lee</strong></span> </div> <div class="color-grey-dark"> <em>Chemosensors</em> <b>2024</b>, <em>12</em>(11), 233; <a href="https://doi.org/10.3390/chemosensors12110233">https://doi.org/10.3390/chemosensors12110233</a> - 9 Nov 2024 </div> Viewed by 688 <div class="abstract-div"> <a href="#" onclick="$(this).next('.abstract-cropped').toggleClass('inline').next('.abstract-full').toggleClass('inline'); return false;"> <strong>Abstract </strong> </a> <div class="abstract-cropped inline"> The semiconductor industry plays a crucial role in various fields but also contributes to environmental degradation. Throughout the semiconductor chip manufacturing process, hazardous gases are released at each stage, despite stringent treatment procedures. These gases can be categorized into four groups: acidic and <a href="#" data-counterslink = "https://www.mdpi.com/2227-9040/12/11/233/more" onclick="$(this).parents('.abstract-cropped').toggleClass('inline').next('.abstract-full').toggleClass('inline'); return false;"> [...] Read more.</a> </div> <div class="abstract-full "> The semiconductor industry plays a crucial role in various fields but also contributes to environmental degradation. Throughout the semiconductor chip manufacturing process, hazardous gases are released at each stage, despite stringent treatment procedures. These gases can be categorized into four groups: acidic and alkaline gases, volatile organic compounds, flammable and corrosive gases, and greenhouse gases. To meet stricter emission standards, further advancements in gas sensor technology are essential. This review examines recent research on monitoring these gases, highlighting the capabilities and limitations of existing sensor technologies. Additionally, the paper discusses current challenges in gas sensing research and proposes future directions for improving technologies. <a href="/2227-9040/12/11/233">Full article</a> </div> </div> <div class="belongsTo" style="margin-bottom: 10px;"> (This article belongs to the Special Issue <a href=" /journal/chemosensors/special_issues/7JC454W2VH ">Gas Sensors for Monitoring Environmental Changes, 2nd Edition</a>)<br/> </div> <a href="#" class="abstract-figures-show" data-counterslink = "https://www.mdpi.com/2227-9040/12/11/233/show" ><span >►</span><span style=" display: none;">▼</span> Show Figures </a><div class="abstract-image-preview "><div class="arrow left-arrow" id="prev1517404"><i class="fa fa-caret-left"></i></div><div class="arrow right-arrow" id="next1517404"><i class="fa fa-caret-right"></i></div><div class="absgraph cycle-slideshow manual" data-cycle-fx="scrollHorz" data-cycle-timeout="0" data-cycle-next="#next1517404" data-cycle-prev="#prev1517404" data-cycle-progressive="#images1517404" data-cycle-slides=">div" data-cycle-log="false"><div class='openpopupgallery cycle-slide' data-imgindex='0' data-target='article-1517404-popup'><span class="helper"></span><img src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=" data-src="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00233/article_deploy/html/images/chemosensors-12-00233-g001-550.jpg?1731139234" alt="" style="border: 0;"><p>Figure 1</p></div><script id="images1517404" type="text/cycle" data-cycle-split="---"><div class='openpopupgallery' data-imgindex='1' data-target='article-1517404-popup'><span class="helper"></span><img src='https://pub.mdpi-res.com/chemosensors/chemosensors-12-00233/article_deploy/html/images/chemosensors-12-00233-g002-550.jpg?1731139235'><p>Figure 2</p></div> --- <div class='openpopupgallery' data-imgindex='2' data-target='article-1517404-popup'><span class="helper"></span><img src='https://pub.mdpi-res.com/chemosensors/chemosensors-12-00233/article_deploy/html/images/chemosensors-12-00233-g003-550.jpg?1731139238'><p>Figure 3</p></div> --- <div class='openpopupgallery' data-imgindex='3' data-target='article-1517404-popup'><span class="helper"></span><img src='https://pub.mdpi-res.com/chemosensors/chemosensors-12-00233/article_deploy/html/images/chemosensors-12-00233-g004-550.jpg?1731139241'><p>Figure 4</p></div> --- <div class='openpopupgallery' data-imgindex='4' data-target='article-1517404-popup'><span class="helper"></span><img src='https://pub.mdpi-res.com/chemosensors/chemosensors-12-00233/article_deploy/html/images/chemosensors-12-00233-g005-550.jpg?1731139244'><p>Figure 5</p></div> --- <div class='openpopupgallery' data-imgindex='5' data-target='article-1517404-popup'><span class="helper"></span><img src='https://pub.mdpi-res.com/chemosensors/chemosensors-12-00233/article_deploy/html/images/chemosensors-12-00233-g006-550.jpg?1731139248'><p>Figure 6</p></div></script></div></div><div id="article-1517404-popup" class="popupgallery" style="display: inline; line-height: 200%"><a href="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00233/article_deploy/html/images/chemosensors-12-00233-g001-550.jpg?1731139234" title=" <strong>Figure 1</strong><br/> <p>The basic steps to obtain a circuit layer and the corresponding exhaust gas at each step.</p> <strong style='display: block; margin-top: 10px; font-size: 18px;'><a style='color: #fff' href='/2227-9040/12/11/233'>Full article</a></strong> "></a><a href="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00233/article_deploy/html/images/chemosensors-12-00233-g002-550.jpg?1731139235" title=" <strong>Figure 2</strong><br/> <p>Timeline chart illustrating the major developments in gas detection technologies.</p> <strong style='display: block; margin-top: 10px; font-size: 18px;'><a style='color: #fff' href='/2227-9040/12/11/233'>Full article</a></strong> "></a><a href="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00233/article_deploy/html/images/chemosensors-12-00233-g003-550.jpg?1731139238" title=" <strong>Figure 3</strong><br/> <p>(<b>a</b>) The low-frequency QTF, utilized in the LITES sensor, improved signal output to about twice that of the commercial QTF [<a href="#B43-chemosensors-12-00233" class="html-bibr">43</a>]. Copyright 2022, Elsevier. (<b>b</b>) The fluorescent nanofilm based on an imine-bond sensor exhibited the ability to detect both HCl and NH<sub>3</sub> [<a href="#B45-chemosensors-12-00233" class="html-bibr">45</a>]. Copyright 2023, American Chemical Society. (<b>c</b>) HCl and NH<sub>3</sub> can be simultaneously detected in a mixture by evaluating two parameters: characteristic frequency (F) and resistance [<a href="#B46-chemosensors-12-00233" class="html-bibr">46</a>]. Copyright 2023, American Chemical Society.</p> <strong style='display: block; margin-top: 10px; font-size: 18px;'><a style='color: #fff' href='/2227-9040/12/11/233'>Full article</a></strong> "></a><a href="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00233/article_deploy/html/images/chemosensors-12-00233-g004-550.jpg?1731139241" title=" <strong>Figure 4</strong><br/> <p>(<b>a</b>) The structure and grain size of PAni composites lower the operating temperature of gas-sensing devices while enhancing their performance [<a href="#B67-chemosensors-12-00233" class="html-bibr">67</a>]. Copyright 2019, Elsevier. (<b>b</b>) The core-shell CsPbBr<sub>3</sub>@ZnO nanocrystals are employed as a sensing material in chemiresistive gas sensors to boost their sensing performance [<a href="#B68-chemosensors-12-00233" class="html-bibr">68</a>]. Copyright 2023, American Chemical Society. (<b>c</b>) The 2D semiconducting Cu(I) coordination polymer enhances the interaction of methanol molecules with active sites, improving sensing performance [<a href="#B69-chemosensors-12-00233" class="html-bibr">69</a>]. Copyright 2024, Wiley.</p> <strong style='display: block; margin-top: 10px; font-size: 18px;'><a style='color: #fff' href='/2227-9040/12/11/233'>Full article</a></strong> "></a><a href="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00233/article_deploy/html/images/chemosensors-12-00233-g005-550.jpg?1731139244" title=" <strong>Figure 5</strong><br/> <p>(<b>a</b>) Layers of solid-state gas sensors for detecting various toxic gases [<a href="#B87-chemosensors-12-00233" class="html-bibr">87</a>]. Copyright 2000, Elsevier. (<b>b</b>) Polyaniline nanofibers with copper(II) bromide used as a sensing material to enhance the detection capabilities for AsH<sub>3</sub> of the gas sensor [<a href="#B88-chemosensors-12-00233" class="html-bibr">88</a>]. Copyright 2009, Elsevier. (<b>c</b>) The Au/rGO sensor exhibits reversible conductivity enhancement when exposed to AsH<sub>3</sub> and displays the output signal in real time [<a href="#B89-chemosensors-12-00233" class="html-bibr">89</a>]. Copyright 2017, Elsevier.</p> <strong style='display: block; margin-top: 10px; font-size: 18px;'><a style='color: #fff' href='/2227-9040/12/11/233'>Full article</a></strong> "></a><a href="https://pub.mdpi-res.com/chemosensors/chemosensors-12-00233/article_deploy/html/images/chemosensors-12-00233-g006-550.jpg?1731139248" title=" <strong>Figure 6</strong><br/> <p>(<b>a</b>) A two-node hollow fullerene is used as a sensing material in gas sensor devices, exhibiting remarkable sensitivity to CF<sub>4</sub> [<a href="#B103-chemosensors-12-00233" class="html-bibr">103</a>]. Copyright 2020, Wiley. (<b>b</b>) Non-metallic doping (sulfur) enhances the CF<sub>3</sub>CF<sub>3</sub> gas sensing properties of SnO<sub>2</sub> [<a href="#B105-chemosensors-12-00233" class="html-bibr">105</a>]. Copyright 2024, Elsevier. (<b>c</b>) Nitrogen doping in the SnO<sub>2</sub> structure increases oxygen vacancies, thereby enhancing the sensor’s performance [<a href="#B107-chemosensors-12-00233" class="html-bibr">107</a>]. Copyright 2024, Royal Society of Chemistry.</p> <strong style='display: block; margin-top: 10px; font-size: 18px;'><a style='color: #fff' href='/2227-9040/12/11/233'>Full article</a></strong> "></a></div> </div> </div> <span class="more" style="display: none;"></span> </div> <div class="row footer"> <div class="listing-select-options"> <div class="columns small-12"> <div class="select generic-item"> <a href="#" class="export-options-show export-element export-expanded"> Show export options <i class="material-icons">expand_more</i> </a> <a href="#" class="export-options-show export-element"> Show export options <i class="material-icons">expand_less</i> </a> </div> <div class="listing-export-options export-element"> <div class="export-element" style="margin-top: 10px; margin-bottom: 10px;"> <input type="checkbox" class="selector selectUnselectAll bb-checkbox" id="selectUnselectAll" data-select-all="article-listing"> <div class="indented bb-indented"> Select all </div> </div> <div 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