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Upgraded nanoparticle-based SERS substrates: superhydrophobicity and oxidative treatment
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"> <head> <!-- Meta Tags --> <meta http-equiv="content-type" content="application/xhtml+xml; charset=utf-8" /> <meta http-equiv="content-language" content="en-ie" /> <meta name="robots" content="index, follow" /> <meta name="description" content="" /> <meta name="keywords" content="" /> <meta name="author" content="Starlight Solutions" /> <!-- Favicon --> <link rel="shortcut icon" href="http://programme.exordo.com/nanop2018/favicon.ico" /> <!-- CSS --> <link rel="stylesheet" type="text/css" href="/nanop2018/css/layout.css" /><link rel="stylesheet" type="text/css" href="/nanop2018/packages/starolas/css/dashboard.css" /><link rel="stylesheet" type="text/css" href="/nanop2018/css/style.css" /> <script type="text/javascript" src="/nanop2018/packages/basics/js/generic.js"></script><script type="text/javascript" src="/nanop2018/packages/starolas/js/jquery.js"></script><script type="text/javascript" src="/nanop2018/packages/basics/js/json2.js"></script> <title>Upgraded nanoparticle-based SERS substrates: superhydrophobicity and oxidative treatment</title> </head> <body> <div id="page"> <div id="page_header"> <div id="page_header_banner"> <div class="dates"> <div class="year"> 2018, </div> <div class="days"> 1st - 3rd October </div> </div> <div class="name"> <a href="http://premc.org/conferences/nanop-nanophotonics-micro-nano-optics/" onclick="window.open(this.href,'_blank');return false;">Nanophotonics and Micro/Nano Optics International Conference 2018</a> </div> <div class="description"> <div class="dots"> <a href="http://www.exordo.com" onclick="window.open(this.href,'_blank');return false;"><img src="/nanop2018/img/template/exordo_dots.png" height="22" width="61" alt="Ex Ordo Dots" /></a> </div> <div class="text"> <a href="/nanop2018/dashboard/programme/" >Conference Programme</a> </div> <div class="status"> </div> </div> </div> </div> <div id="page_content"> <div id="page_content_main_container"> <div class="page_content_main"> <script type="text/javascript"> /* <![CDATA[ */ // Show the long version of the abstract function showAbstract(id) { document.getElementById('abstract_short_' + id).style.display = "none"; document.getElementById('abstract_long_' + id).style.display = "block"; return false; } /* ]]> */ </script> <style> h1 { font-size: 18pt; line-height: 32px; margin: 20px 0px 10px; } </style> <div class="delegate__presentation"> <h1>Upgraded nanoparticle-based SERS substrates: superhydrophobicity and oxidative treatment</h1> <div class="presenter_and_bio"> <h2>Andrei Novikov</h2> <p> <em>Gubkin University</em> </p> <p> Andrei A. Novikov,聽Ph.D. in Chemistry, is a Senior scientist, and Assistant professor at Dept. of Physical and Colloid Chemistry, Gubkin University, Moscow, Russia.He is teaching the classes: "Physical Chemistry", "Kinetics and Catalysis", "Surface Phenomena and Disperse Systems", "Biotechnology in Oil and Gas Industry", "Advanced Physical Chemistry". Under his supervision, 2 master's theses are presented each year.His research group develops express methods of identification of microbes, including lipid analysis and SERS studies. Interests: metrology, regression analysis, and developing the scripts in GNU/Octave and Matlab for automated spectra processing. </p> </div> <h2>Abstract</h2> <div id="abstract_short_1"> <p> Introduction Gold nanoparticles can be easily assembled to potent substrates for surface-enhanced Raman spectroscopy (SERS). We studied additional amplification of SERS signal by the oxidative treatment [1], and by providing... [ <a href="/nanop2018/" onclick="return showAbstract('1');">view full abstract</a> ] </p> </div> <div id="abstract_long_1" style="display:none;"> <p> <p><em>Introduction</em></p><br /><p>Gold nanoparticles can be easily assembled to potent substrates for surface-enhanced Raman spectroscopy (SERS). We studied additional amplification of SERS signal by the oxidative treatment [1], and by providing the superhydrophobic properties of the substrates.</p><br /><p><em>Methods</em></p><br /><p>We have synthesized nearly spherical citrate-capped gold nanoparticles of different size from 20 to 120 nm by known method with modifications [2]. The maximum enhancement (above 10<sup>6</sup>) in SERS experiments with 785-nm excitation (BWTEK BWS415) was provided by structures fabricated from 50-nm nanoparticles. Superhydrophobic substrates were produced by drop-casting of C18-silanized halloysite nanotubes dispersion.</p><br /><p><em>Results</em></p><br /><p>These nanoparticles demonstrated catalytic activity in oxidation of dyes with hydrogen peroxide, following the pseudo-first-order kinetics. In SERS-controlled catalytic experiments we observed additional enhancement, and the maximal one was observed with 3%(v/v) hydrogen peroxide. Exploiting this phenomenon, we detected model analytes at concentration of 5脳10<sup>-9</sup> M, while it was impossible without the hydrogen peroxide addition. Further improvement in the SERS substrates sensitivity was achieved by aggregation of gold nanoparticles on the superhydrophobic surface.</p><br /><p><em>Discussion</em></p><br /><p>The nanoparticle-based SERS substrates can be upgraded by making the hot spots available for adsorption of analyte, and by concentrating the analyte on the superhydrophobic surface. The substrates upgraded this way have the sensitivity more than an order higher in comparison with simple drop-casted substrates.</p><br /><p><strong>Acknowledgements:</strong> This work was supported by the Ministry of Education and Science of the Russian Federation (Grant No 14.Z50.31.0035).</p><br /><p>1. M.V. Gorbachevskiy, D.S. Kopitsyn, M.S. Kotelev, E.V. Ivanov, V.A. Vinokurov, A.A. Novikov.聽<em>RSC Advances</em>, 2018, 8, 19051-19057.</p><br /><p>2. N.G. Bastus, J. Comenge, V. Puntes. <em>Langmuir</em>, 2011, 27, 11098.</p><br /><p><br></p> </p> </div> <h2>Authors</h2> <ol> <li> <u>Andrei Novikov</u> (Gubkin University) </li> <li> Maksim Gorbachevskii (Gubkin University) </li> <li> Dmitry Kopitsyn (Gubkin University) </li> <li> Mikhail Kotelev (Gubkin University) </li> <li> Alexandra Kuchierskaya (Gubkin University) </li> <li> Evgenii Ivanov (Gubkin University) </li> <li> Vladimir Vinokurov (Gubkin University) </li> </ol> <h2>Topic Areas</h2> <p> Photonic & plasmonic nanomaterials , Optical properties of nanostructures , Enhanced spectroscopy and sensing </p> <h2>Session</h2> <p> OS2b-2 » <a href="/nanop2018/delegates/session/24/" >Enhanced spectroscopy and sensing</a> (16:50 - Tuesday, 2nd October, ROOM 2) </p> <div class="presentation_files"> <h2>Presentation Files</h2> <p>The presenter has not uploaded any presentation files. </p> </div> </div> </div> </div> <div id="page_content_side_container"> <div class="page_content_side"> <div class="menu"> </div> </div> </div> <div class="clear"> </div> </div> <div id="page_footer"> <div id="page_footer_container"> <div class="links"> <a href="mailto:support@exordo.com" >Email Support</a> • <a href="https://www.exordo.com/blog/" onclick="window.open(this.href,'_blank');return false;">Blog</a> • <a href="https://www.exordo.com/legal/data-protection-and-privacy-policy" onclick="window.open(this.href,'_blank');return false;">Privacy Policy</a> • <a href="/nanop2018/cancellation-policy" >Cancellation Policy</a> </div> <div class="powered_by"> <div class="pb"> powered by </div> <div class="exordo"> <a href="http://www.exordo.com" onclick="window.open(this.href,'_blank');return false;"><img src="/nanop2018/img/template/exordo_logo.png" height="24" width="121" alt="Ex Ordo" /></a> </div> </div> </div> </div> </div> <div class="url" style="display: none; text-indent: -999em;">http://programme.exordo.com/nanop2018/system/is_sync/</div> <script type="text/javascript" src="/nanop2018/packages/starolas/js/is_syncing.js"></script> </body> </html>