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nanostructured materials</title> <meta name="description" content="Search results for: nanostructured materials"> <meta name="keywords" content="nanostructured materials"> <meta name="viewport" content="width=device-width, initial-scale=1, minimum-scale=1, maximum-scale=1, user-scalable=no"> <meta charset="utf-8"> <link href="https://cdn.waset.org/favicon.ico" type="image/x-icon" rel="shortcut icon"> <link href="https://cdn.waset.org/static/plugins/bootstrap-4.2.1/css/bootstrap.min.css" rel="stylesheet"> <link href="https://cdn.waset.org/static/plugins/fontawesome/css/all.min.css" rel="stylesheet"> <link href="https://cdn.waset.org/static/css/site.css?v=150220211555" rel="stylesheet"> </head> <body> <header> <div class="container"> <nav class="navbar navbar-expand-lg navbar-light"> <a class="navbar-brand" href="https://waset.org"> <img src="https://cdn.waset.org/static/images/wasetc.png" alt="Open Science Research Excellence" title="Open Science Research Excellence" /> </a> <button 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action="https://publications.waset.org/abstracts/search"> <div id="custom-search-input"> <div class="input-group"> <i class="fas fa-search"></i> <input type="text" class="search-query" name="q" placeholder="Author, Title, Abstract, Keywords" value="nanostructured materials"> <input type="submit" class="btn_search" value="Search"> </div> </div> </form> </div> </div> <div class="row mt-3"> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Commenced</strong> in January 2007</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Frequency:</strong> Monthly</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Edition:</strong> International</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Paper Count:</strong> 6953</div> </div> </div> </div> <h1 class="mt-3 mb-3 text-center" style="font-size:1.6rem;">Search results for: nanostructured materials</h1> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">6953</span> SO2 Sensing Performance of Nanostructured CdSnO3 Thin Films Prepared by Spray Pyrolysis Technique</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=R.%20H.%20Bari">R. H. Bari</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The nanostructured thin films of CdSnO3 are sensitive to change in their environment. CdSnO3 is successfully used as gas sensor due to the dependence of the electrical conductivity on the ambient gas composition. Nanostructured CdSnO3 thin films of different substrate temperature (300 0C, 350 0C, 400 0C and 450 0C) were deposited onto heated glass substrate by simple spray pyrolysis (SP) technique. Sensing elements of nanostructured CdSnO3 were annealed at 500 0C for 1 hrs. Characterization includes a different analytical technique such as, X-ray diffractogram (XRD), energy dispersive X-ray analysis (EDAX), and Field emission scanning electron microscope (FE-SEM). The average grain size observed from XRD and FF-SEM was found to be less than 18.36 and 23 nm respectively. The films sprayed at substrate temperature for 400 0C was observed to be most sensitive (S = 530) to SO2 for 500 ppm at 300 0C. The response and recovery time is 4 sec, 8 sec respectively. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=nanostructured%20CdSnO3" title="nanostructured CdSnO3">nanostructured CdSnO3</a>, <a href="https://publications.waset.org/abstracts/search?q=spray%20pyrolysis" title=" spray pyrolysis"> spray pyrolysis</a>, <a href="https://publications.waset.org/abstracts/search?q=SO2%20gas%20sensing" title=" SO2 gas sensing"> SO2 gas sensing</a>, <a href="https://publications.waset.org/abstracts/search?q=quick%20response" title=" quick response"> quick response</a> </p> <a href="https://publications.waset.org/abstracts/22298/so2-sensing-performance-of-nanostructured-cdsno3-thin-films-prepared-by-spray-pyrolysis-technique" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/22298.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">286</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">6952</span> Development of Nanostructured Materials for the Elimination of Emerging Pollutants in Water through Adsorption Processes</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=J.%20Morillo">J. Morillo</a>, <a href="https://publications.waset.org/abstracts/search?q=Otal%20E."> Otal E.</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20Caballero"> A. Caballero</a>, <a href="https://publications.waset.org/abstracts/search?q=R.%20M.%20Pere%C3%B1iguez"> R. M. Pereñiguez</a>, <a href="https://publications.waset.org/abstracts/search?q=J.%20Usero"> J. Usero</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The present work shows in the first place, the manufacture of the perovskitic material used as adsorbent, by means of two different methods to obtain two types of perovskites (LaFeO₃ and BiFeO₃). The results of this work show the characteristics of this manufactured material, as well as the synthesis yields obtained, achieving a better result for the self-combustion synthesis. Secondly, from the manufactured perovskites, an adsorption system has been developed, at the laboratory level, for the adsorption of the emerging pollutants Trimethoprim, Ciprofloxacin and Ibuprofen. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=nanostructured%20materials" title="nanostructured materials">nanostructured materials</a>, <a href="https://publications.waset.org/abstracts/search?q=emerging%20pollutants" title=" emerging pollutants"> emerging pollutants</a>, <a href="https://publications.waset.org/abstracts/search?q=water" title=" water"> water</a>, <a href="https://publications.waset.org/abstracts/search?q=adsorption%20processes" title=" adsorption processes"> adsorption processes</a> </p> <a href="https://publications.waset.org/abstracts/143630/development-of-nanostructured-materials-for-the-elimination-of-emerging-pollutants-in-water-through-adsorption-processes" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/143630.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">151</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">6951</span> The High Strength Biocompatible Wires of Commercially Pure Titanium</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=J.%20Pal%C3%A1n">J. Palán</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20Zemko"> M. Zemko</a> </p> <p class="card-text"><strong>Abstract:</strong></p> COMTES FHT has been active in a field of research and development of high-strength wires for quite some time. The main material was pure titanium. The primary goal of this effort is to develop a continuous production process for ultrafine and nanostructured materials with the aid of severe plastic deformation (SPD). This article outlines mechanical and microstructural properties of the materials and the options available for testing the components made of these materials. Ti Grade 2 and Grade 4 wires are the key products of interest. Ti Grade 2 with ultrafine to nano-sized grain shows ultimate strength of up to 1050 MPa. Ti Grade 4 reaches ultimate strengths of up to 1250 MPa. These values are twice or three times as higher as those found in the unprocessed material. For those fields of medicine where implantable metallic materials are used, bulk ultrafine to nanostructured titanium is available. It is manufactured by SPD techniques. These processes leave the chemical properties of the initial material unchanged but markedly improve its final mechanical properties, in particular, the strength. Ultrafine to nanostructured titanium retains all the significant and, from the biological viewpoint, desirable properties that are important for its use in medicine, i.e. those properties which made pure titanium the preferred material also for dental implants. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=CONFORM" title="CONFORM">CONFORM</a>, <a href="https://publications.waset.org/abstracts/search?q=ECAP" title=" ECAP"> ECAP</a>, <a href="https://publications.waset.org/abstracts/search?q=rotary%20swaging" title=" rotary swaging"> rotary swaging</a>, <a href="https://publications.waset.org/abstracts/search?q=titanium" title=" titanium"> titanium</a> </p> <a href="https://publications.waset.org/abstracts/73209/the-high-strength-biocompatible-wires-of-commercially-pure-titanium" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/73209.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">243</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">6950</span> Electrochemical Top-Down Synthesis of Nanostructured Support and Catalyst Materials for Energy Applications</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Peter%20M.%20Schneider">Peter M. Schneider</a>, <a href="https://publications.waset.org/abstracts/search?q=Batyr%20Garlyyev"> Batyr Garlyyev</a>, <a href="https://publications.waset.org/abstracts/search?q=Sebastian%20A.%20Watzele"> Sebastian A. Watzele</a>, <a href="https://publications.waset.org/abstracts/search?q=Aliaksandr%20S.%20Bandarenka"> Aliaksandr S. Bandarenka</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Functional nanostructures such as nanoparticles are a promising class of materials for energy applications due to their unique properties. Bottom-up synthetic routes for nanostructured materials often involve multiple synthesis steps and the use of surfactants, reducing agents, or stabilizers. This results in complex and extensive synthesis protocols. In recent years, a novel top-down synthesis approach to form metal nanoparticles has been established, in which bulk metal wires are immersed in an electrolyte (primarily alkali earth metal based) and subsequently subjected to a high alternating potential. This leads to the generation of nanoparticles dispersed in the electrolyte. The main advantage of this facile top-down approach is that there are no reducing agents, surfactants, or precursor solutions. The complete synthesis can be performed in one pot involving one main step with consequent washing and drying of the nanoparticles. More recent studies investigated the effect of synthesis parameters such as potential amplitude, frequency, electrolyte composition, and concentration on the size and shape of the nanoparticles. Here, we investigate the electrochemical erosion of various metal wires such as Ti, Pt, Pd, and Sn in various electrolyte compositions via this facile top-down technique and its experimental optimization to successfully synthesize nanostructured materials for various energy applications. As an example, for Pt and Pd, homogeneously distributed nanoparticles on carbon support can be obtained. These materials can be used as electrocatalyst materials for the oxygen reduction reaction (ORR) and hydrogen evolution reaction (HER), respectively. In comparison, the top-down erosion of Sn wires leads to the formation of nanoparticles, which have great potential as oxygen evolution reaction (OER) support materials. The application of the technique on Ti wires surprisingly leads to the formation of nanowires, which show a high surface area and demonstrate great potential as an alternative support material to carbon. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=ORR" title="ORR">ORR</a>, <a href="https://publications.waset.org/abstracts/search?q=electrochemistry" title=" electrochemistry"> electrochemistry</a>, <a href="https://publications.waset.org/abstracts/search?q=electrocatalyst" title=" electrocatalyst"> electrocatalyst</a>, <a href="https://publications.waset.org/abstracts/search?q=synthesis" title=" synthesis"> synthesis</a> </p> <a href="https://publications.waset.org/abstracts/163298/electrochemical-top-down-synthesis-of-nanostructured-support-and-catalyst-materials-for-energy-applications" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/163298.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">82</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">6949</span> Low Nonlinear Effects Index-Guiding Nanostructured Photonic Crystal Fiber</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=S.%20Olyaee">S. Olyaee</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20Seifouri"> M. Seifouri</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20Nikoosohbat"> A. Nikoosohbat</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20Shams%20Esfand%20Abadi"> M. Shams Esfand Abadi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Photonic Crystal Fibers (PCFs) can be used in optical communications as transmission lines. For this reason, the PCFs with low confinement loss, low chromatic dispersion, and low nonlinear effects are highly suitable transmission media. In this paper, we introduce a new design of index-guiding nanostructured photonic crystal fiber (IG-NPCF) with ultra-low chromatic dispersion, low nonlinearity effects, and low confinement loss. Relatively low dispersion is achieved in the wavelength range of 1200 to 1600nm using the proposed design. According to the new structure of nanostructured PCF presented in this study, the chromatic dispersion slope is -30(ps/km.nm) and the confinement loss reaches below 10-7 dB/km. While in the wavelength range mentioned above at the same time an effective area of more than 50.2μm2 is obtained. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=optical%20communication%20systems" title="optical communication systems">optical communication systems</a>, <a href="https://publications.waset.org/abstracts/search?q=nanostructured" title=" nanostructured"> nanostructured</a>, <a href="https://publications.waset.org/abstracts/search?q=index-guiding" title=" index-guiding"> index-guiding</a>, <a href="https://publications.waset.org/abstracts/search?q=dispersion" title=" dispersion"> dispersion</a>, <a href="https://publications.waset.org/abstracts/search?q=confinement%20loss" title=" confinement loss"> confinement loss</a>, <a href="https://publications.waset.org/abstracts/search?q=photonic%20crystal%20fiber" title=" photonic crystal fiber"> photonic crystal fiber</a> </p> <a href="https://publications.waset.org/abstracts/18766/low-nonlinear-effects-index-guiding-nanostructured-photonic-crystal-fiber" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/18766.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">560</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">6948</span> Determination of Strain Rate Sensitivity (SRS) for Grain Size Variants on Nanocrystalline Materials Produced by ARB and ECAP</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=P.%20B.%20Sob">P. B. Sob</a>, <a href="https://publications.waset.org/abstracts/search?q=T.%20B.%20Tengen"> T. B. Tengen</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20A.%20Alugongo"> A. A. Alugongo</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Mechanical behavior of 6082T6 aluminum is investigated at different temperatures. The strain rate sensitivity is investigated at different temperatures on the grain size variants. The sensitivity of the measured grain size variants on 3-D grain is discussed. It is shown that the strain rate sensitivities are negative for the grain size variants during the deformation of nanostructured materials. It is also observed that the strain rate sensitivities vary in different ways with the equivalent radius, semi minor axis radius, semi major axis radius and major axis radius. From the obtained results, it is shown that the variation of strain rate sensitivity with temperature suggests that the strain rate sensitivity at the low and the high temperature ends of the 6082T6 aluminum range is different. The obtained results revealed transition at different temperature from negative strain rate sensitivity as temperature increased on the grain size variants. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=nanostructured%20materials" title="nanostructured materials">nanostructured materials</a>, <a href="https://publications.waset.org/abstracts/search?q=grain%20size%20variants" title=" grain size variants"> grain size variants</a>, <a href="https://publications.waset.org/abstracts/search?q=temperature" title=" temperature"> temperature</a>, <a href="https://publications.waset.org/abstracts/search?q=yield%20stress" title=" yield stress"> yield stress</a>, <a href="https://publications.waset.org/abstracts/search?q=strain%20rate%20sensitivity" title=" strain rate sensitivity"> strain rate sensitivity</a> </p> <a href="https://publications.waset.org/abstracts/36624/determination-of-strain-rate-sensitivity-srs-for-grain-size-variants-on-nanocrystalline-materials-produced-by-arb-and-ecap" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/36624.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">287</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">6947</span> Alpha-To-Omega Phase Transition in Bulk Nanostructured Ti and (α+β) Ti Alloys</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Askar%20Kilmametov">Askar Kilmametov</a>, <a href="https://publications.waset.org/abstracts/search?q=Julia%20Ivanisenko"> Julia Ivanisenko</a>, <a href="https://publications.waset.org/abstracts/search?q=Boris%20Straumal"> Boris Straumal</a>, <a href="https://publications.waset.org/abstracts/search?q=Horst%20Hahn"> Horst Hahn</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The high-pressure α- to ω-phase transition was discovered in elemental Ti and Zr fifty years ago using static high pressure and then observed to appear between 2 and 12 GPa at room temperature, depending on the experimental technique, the pressure environment, and the sample purity. The fact that ω-phase is retained in a metastable state in ambient condition after the removal of the pressure has been used to check the changes in magnetic and superconductive behavior, electron band structure and mechanical properties. However, the fundamental knowledge on a combination of both mechanical treatment and high applied pressure treatments for ω-phase formation in Ti alloys is currently lacking and has to be studied in relation to improved mechanical properties of bulk nanostructured states. In the present study, nanostructured (α+β) Ti alloys containing β-stabilizing elements such as Co, Fe, Cr, Nb were performed by severe plastic deformation, namely high pressure torsion (HPT) technique. HPT-induced α- to ω-phase transformation was revealed in dependence on applied pressure and shear strains by means of X-ray diffraction, transmission electron microscopy, and differential scanning calorimetry. The transformation kinetics was compared with the kinetics of pressure-induced transition. Orientation relationship between α-, β- and ω-phases was taken into consideration and analyzed according to theoretical calculation proposed earlier. The influence of initial state before HPT appeared to be considerable for subsequent α- to ω-phase transition. Thermal stability of the HPT-induced ω-phase was discussed as well in the frame of mechanical behavior of Ti and Ti-based alloys produced by shear deformation under high applied pressure. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=bulk%20nanostructured%20materials" title="bulk nanostructured materials">bulk nanostructured materials</a>, <a href="https://publications.waset.org/abstracts/search?q=high%20pressure%20phase%20transitions" title=" high pressure phase transitions"> high pressure phase transitions</a>, <a href="https://publications.waset.org/abstracts/search?q=severe%20plastic%20deformation" title=" severe plastic deformation"> severe plastic deformation</a>, <a href="https://publications.waset.org/abstracts/search?q=titanium%20alloys" title=" titanium alloys"> titanium alloys</a> </p> <a href="https://publications.waset.org/abstracts/55970/alpha-to-omega-phase-transition-in-bulk-nanostructured-ti-and-av-ti-alloys" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/55970.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">419</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">6946</span> Preparation of 1D Nano-Polyaniline/Dendritic Silver Composites</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Wen-Bin%20Liau">Wen-Bin Liau</a>, <a href="https://publications.waset.org/abstracts/search?q=Wan-Ting%20Wang"> Wan-Ting Wang</a>, <a href="https://publications.waset.org/abstracts/search?q=Chiang-Jen%20Hsiao"> Chiang-Jen Hsiao</a>, <a href="https://publications.waset.org/abstracts/search?q=Sheng-Mao%20Tseng"> Sheng-Mao Tseng</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this paper, an interesting and easy method to prepare one-dimensional nanostructured polyaniline/dendritic silver composites is reported. It is well known that the morphology of metal particle is a very important factor to influence the properties of polymer-metal composites. Usually, the dendritic silver is prepared by kinetic control in reduction reaction. It is not a thermodynamically stable structure. It is the goal to reduce silver ion to dendritic silver by polyaniline polymer via kinetic control and form one-dimensional nanostructured polyaniline/dendritic silver composites. The preparation is a two steps sequential reaction. First step, the polyaniline networks composed of nano fibrillar polyaniline are synthesized from aniline monomers aqueous with ammonium persulfate as the initiator at room temperature. In second step, the silver nitrate is added into polyaniline networks dispersed in deionized water. The dendritic silver is formed via reduction by polyaniline networks under the kinetic control. The formation of polyaniline is discussed via transmission electron microscopy (TEM). Nanosheets, nanotubes, nanospheres, nanosticks, and networks are observed via TEM. Then, the mechanism of formation of one-dimensional nanostructured polyaniline/dendritic silver composites is discussed. The formation of dendritic silver is observed by TEM and X-ray diffraction. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=1D%20nanostructured%20polyaniline" title="1D nanostructured polyaniline">1D nanostructured polyaniline</a>, <a href="https://publications.waset.org/abstracts/search?q=dendritic%20silver" title=" dendritic silver"> dendritic silver</a>, <a href="https://publications.waset.org/abstracts/search?q=synthesis" title=" synthesis"> synthesis</a> </p> <a href="https://publications.waset.org/abstracts/24911/preparation-of-1d-nano-polyanilinedendritic-silver-composites" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/24911.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">500</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">6945</span> Structural and Phase Transformations of Pure and Silica Treated Nanofibrous Al₂O₃</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=T.%20H.%20N.%20Nguyen">T. H. N. Nguyen</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20Khodan"> A. Khodan</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20Amamra"> M. Amamra</a>, <a href="https://publications.waset.org/abstracts/search?q=J-V.%20Vignes"> J-V. Vignes</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20Kanaev"> A. Kanaev</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The ultraporous nanofibrous alumina (NOA, Al2O3·nH2O) was synthesized by oxidation of laminated aluminium plates through a liquid mercury-silver layer in a humid atmosphere ~80% at 25°C. The material has an extremely high purity (99%), porosity (90%) and specific area (300 m2/g). The subsequent annealing of raw NOA permits obtaining pure transition phase (γ and θ) nanostructured materials. In this combination, we report on chemical, structural and phase transformations of pure and modified NOA by an impregnation of trimethylethoxysilane (TMES) and tetraethoxysilane (TEOS) during thermal annealing in the temperature range between 20 and 1650°C. The mass density, specific area, average diameter and specific area are analysed. The 3D model of pure NOA monoliths and silica modified NOA is proposed, which successfully describes the evolution of specific area, mass density and phase transformations. Activation energies of the mass transport in two regimes of surface diffusion and bulk sintering were obtained based on this model. We conclude about a common origin of modifications of the NOA morphology, chemical composition and phase transition. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=nanostructured%20materials" title="nanostructured materials">nanostructured materials</a>, <a href="https://publications.waset.org/abstracts/search?q=alumina%20%28Al%E2%82%82O%E2%82%83%29" title=" alumina (Al₂O₃)"> alumina (Al₂O₃)</a>, <a href="https://publications.waset.org/abstracts/search?q=morphology" title=" morphology"> morphology</a>, <a href="https://publications.waset.org/abstracts/search?q=phase%20transitions" title=" phase transitions"> phase transitions</a> </p> <a href="https://publications.waset.org/abstracts/51234/structural-and-phase-transformations-of-pure-and-silica-treated-nanofibrous-al2o3" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/51234.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">377</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">6944</span> Effects of Sintering Temperature on Microstructure and Mechanical Properties of Nanostructured Ni-17Cr Alloy</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=B.%20J.%20Babalola">B. J. Babalola</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20B.%20Shongwe"> M. B. Shongwe</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Spark Plasma Sintering technique is a novel processing method that produces limited grain growth and highly dense variety of materials; alloys, superalloys, and carbides just to mention a few. However, initial particle size and spark plasma sintering parameters are factors which influence the grain growth and mechanical properties of sintered materials. Ni-Cr alloys are regarded as the most promising alloys for aerospace turbine blades, owing to the fact that they meet the basic requirements of desirable mechanical strength at high temperatures and good resistance to oxidation. The conventional method of producing this alloy often results in excessive grain growth and porosity levels that are detrimental to its mechanical properties. The effect of sintering temperature was evaluated on the microstructure and mechanical properties of the nanostructured Ni-17Cr alloy. Nickel and chromium powder were milled using high energy ball milling independently for 30 hours, milling speed of 400 revs/min and ball to powder ratio (BPR) of 10:1. The milled powders were mixed in the composition of Nickel having 83 wt % and chromium, 17 wt %. This was sintered at varied temperatures from 800°C, 900°C, 1000°C, 1100°C and 1200°C. The structural characteristics such as porosity, grain size, fracture surface and hardness were analyzed by scan electron microscopy and X-ray diffraction, Archimedes densitometry, micro-hardness tester. The corresponding results indicated an increase in the densification and hardness property of the alloy as the temperature increases. The residual porosity of the alloy reduces with respect to the sintering temperature and in contrast, the grain size was enhanced. The study of the mechanical properties, including hardness, densification shows that optimum properties were obtained for the sintering temperature of 1100°C. The advantages of high sinterability of Ni-17Cr alloy using milled powders and microstructural details were discussed. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=densification" title="densification">densification</a>, <a href="https://publications.waset.org/abstracts/search?q=grain%20growth" title=" grain growth"> grain growth</a>, <a href="https://publications.waset.org/abstracts/search?q=milling" title=" milling"> milling</a>, <a href="https://publications.waset.org/abstracts/search?q=nanostructured%20materials" title=" nanostructured materials"> nanostructured materials</a>, <a href="https://publications.waset.org/abstracts/search?q=sintering%20temperature" title=" sintering temperature "> sintering temperature </a> </p> <a href="https://publications.waset.org/abstracts/83005/effects-of-sintering-temperature-on-microstructure-and-mechanical-properties-of-nanostructured-ni-17cr-alloy" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/83005.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">402</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">6943</span> Photoelectrochemical Study of Nanostructured Acropora-Like Lead Sulfide Thin Films</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=S.%20Kaci">S. Kaci</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20Keffous"> A. Keffous</a>, <a href="https://publications.waset.org/abstracts/search?q=O.%20Fellahi"> O. Fellahi</a>, <a href="https://publications.waset.org/abstracts/search?q=I.%20Bozetine"> I. Bozetine</a>, <a href="https://publications.waset.org/abstracts/search?q=H.%20Menari"> H. Menari</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this paper, we report the fabrication and characterization of Acropora-like lead sulfide nanostructured thin films using chemical bath deposition. The method has the strong points of low temperature and no surfactant, comparing with the other method. The preferential growth directions of the broad branches were indexed as along (200) directions. The photoelectrochemical property of the as-deposited thin films was also investigated. Photoelectrochemical characterization was performed in the aim to determine the flat band potential (Vfb) and to confirm the n-type character of PbS, elucidated from the J(V) curves both in the dark and under illumination. The apparition of the photocurrent Jph started at a potential VON of −0.41 V/ECS and increased towards the anodic direction, which is typical of n-type behavior. The near infrared absorbance spectrum displayed an absorbance edge at 1959 nm, showing blue shift comparing to bulk PbS (3020 nm). These nanostructured lead sulfide thin films may have potential application as dispersed photoelectrode capable of generating H2 under visible light. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=lead%20sulfide" title="lead sulfide">lead sulfide</a>, <a href="https://publications.waset.org/abstracts/search?q=nanostructures" title=" nanostructures"> nanostructures</a>, <a href="https://publications.waset.org/abstracts/search?q=photo-conversion" title=" photo-conversion"> photo-conversion</a>, <a href="https://publications.waset.org/abstracts/search?q=thin%20films" title=" thin films"> thin films</a> </p> <a href="https://publications.waset.org/abstracts/32984/photoelectrochemical-study-of-nanostructured-acropora-like-lead-sulfide-thin-films" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/32984.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">362</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">6942</span> Sustainable Membranes Based on 2D Materials for H₂ Separation and Purification</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Juan%20A.%20G.%20Carrio">Juan A. G. Carrio</a>, <a href="https://publications.waset.org/abstracts/search?q=Prasad%20Talluri"> Prasad Talluri</a>, <a href="https://publications.waset.org/abstracts/search?q=Sergio%20G.%20Echeverrigaray"> Sergio G. Echeverrigaray</a>, <a href="https://publications.waset.org/abstracts/search?q=Antonio%20H.%20Castro%20Neto"> Antonio H. Castro Neto</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Hydrogen as a fuel and environmentally pleasant energy carrier is part of this transition towards low-carbon systems. The extensive deployment of hydrogen production, purification and transport infrastructures still represents significant challenges. Independent of the production process, the hydrogen generally is mixed with light hydrocarbons and other undesirable gases that need to be removed to obtain H₂ with the required purity for end applications. In this context, membranes are one of the simplest, most attractive, sustainable, and performant technologies enabling hydrogen separation and purification. They demonstrate high separation efficiencies and low energy consumption levels in operation, which is a significant leap compared to current energy-intensive options technologies. The unique characteristics of 2D laminates have given rise to a diversity of research on their potential applications in separation systems. Specifically, it is already known in the scientific literature that graphene oxide-based membranes present the highest reported selectivity of H₂ over other gases. This work explores the potential of a new type of 2D materials-based membranes in separating H₂ from CO₂ and CH₄. We have developed nanostructured composites based on 2D materials that have been applied in the fabrication of membranes to maximise H₂ selectivity and permeability, for different gas mixtures, by adjusting the membranes' characteristics. Our proprietary technology does not depend on specific porous substrates, which allows its integration in diverse separation modules with different geometries and configurations, looking to address the technical performance required for industrial applications and economic viability. The tuning and precise control of the processing parameters allowed us to control the thicknesses of the membranes below 100 nanometres to provide high permeabilities. Our results for the selectivity of new nanostructured 2D materials-based membranes are in the range of the performance reported in the available literature around 2D materials (such as graphene oxide) applied to hydrogen purification, which validates their use as one of the most promising next-generation hydrogen separation and purification solutions. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=membranes" title="membranes">membranes</a>, <a href="https://publications.waset.org/abstracts/search?q=2D%20materials" title=" 2D materials"> 2D materials</a>, <a href="https://publications.waset.org/abstracts/search?q=hydrogen%20purification" title=" hydrogen purification"> hydrogen purification</a>, <a href="https://publications.waset.org/abstracts/search?q=nanocomposites" title=" nanocomposites"> nanocomposites</a> </p> <a href="https://publications.waset.org/abstracts/161099/sustainable-membranes-based-on-2d-materials-for-h2-separation-and-purification" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/161099.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">134</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">6941</span> Study of the Nanostructured Fe₅₀Cr₃₅Ni₁₅ Powder Alloy Developed by Mechanical Alloying</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Salim%20Triaa">Salim Triaa</a>, <a href="https://publications.waset.org/abstracts/search?q=Fella%20Kali-Ali"> Fella Kali-Ali</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Nanostructured Fe₅₀Cr3₃₅Ni₁₅ alloys were prepared from pure elemental powders using high energy mechanical alloying. The mixture powders obtained are characterized by several techniques. X-ray diffraction analysis revelated the formation of the Fe₁Cr₁ compound with BBC structure after one hour of milling. A second compound Fe₃Ni₂ with FCC structure was observed after 12 hours of milling. The size of crystallite determined by Williamson Hall method was about 5.1 nm after 48h of mill. SEM observations confirmed the growth of crushed particles as a function of milling time, while the homogenization of our powders into different constituent elements was verified by the EDX analysis. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Fe-Cr-Ni%20alloy" title="Fe-Cr-Ni alloy">Fe-Cr-Ni alloy</a>, <a href="https://publications.waset.org/abstracts/search?q=mechanical%20alloying" title=" mechanical alloying"> mechanical alloying</a>, <a href="https://publications.waset.org/abstracts/search?q=nanostructure" title=" nanostructure"> nanostructure</a>, <a href="https://publications.waset.org/abstracts/search?q=SEM" title=" SEM"> SEM</a>, <a href="https://publications.waset.org/abstracts/search?q=XRD" title=" XRD"> XRD</a> </p> <a href="https://publications.waset.org/abstracts/101771/study-of-the-nanostructured-fe50cr35ni15-powder-alloy-developed-by-mechanical-alloying" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/101771.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">175</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">6940</span> The Effect of Si Content on the Physical Properties of Nanostructured (Ni75Fe25)100-xSix Alloy Elaborated by Mechanical Alloying</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=A.%20Kaibi">A. Kaibi</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20Guittoum"> A. Guittoum</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20Hemmous"> M. Hemmous</a>, <a href="https://publications.waset.org/abstracts/search?q=D.%20Mart%C3%ADnez-Blanco"> D. Martínez-Blanco</a>, <a href="https://publications.waset.org/abstracts/search?q=P.%20Gorria"> P. Gorria</a>, <a href="https://publications.waset.org/abstracts/search?q=J.%20A.%20Blanco"> J. A. Blanco</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20Kechouane"> M. Kechouane</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The present work deals with the effect of Si content on the physical properties of nanostructured (Ni75Fe25)100-x Six (x=0, 3.5, 6.5, 9, 12, and 15 at %) powders elaborated by mechanical alloying for a milling time of 96 h. The microstructure, hyperfine, and magnetic properties of the powders were investigated as a function of Si content by means of X-ray diffraction (XRD), Scanning Electron Microscopy (SEM), Mössbauer Spectroscopy, and Vibrating Sample magnetometry (VSM). From XRD spectra, the formation of FCC disordered Ni (Fe,Si) solid solution was evidenced after 96 h. As Si content increases, the lattice parameter and the grain size decrease (from ~28 to 15 nm), while the microstrain level decreases from 0.98% to 0.65%. From SEM micrographs, we showed that powder particles become round in shape and decrease in size with increasing Si content. For all Si content, the adjustment of Mössbauer spectra confirmed the formation of a disordered ferromagnetic NiFeSi phase. From hysteresis curves, we have extracted the values of saturation magnetization and coercive field for all powders. The evolution of Ms and Hc as a function of Si content will be discussed. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=nanostructured%20powders" title="nanostructured powders">nanostructured powders</a>, <a href="https://publications.waset.org/abstracts/search?q=%28Ni75Fe25%29100-xSix%20alloy" title=" (Ni75Fe25)100-xSix alloy"> (Ni75Fe25)100-xSix alloy</a>, <a href="https://publications.waset.org/abstracts/search?q=microstructure" title=" microstructure"> microstructure</a>, <a href="https://publications.waset.org/abstracts/search?q=magnetic%20properties" title=" magnetic properties"> magnetic properties</a> </p> <a href="https://publications.waset.org/abstracts/192107/the-effect-of-si-content-on-the-physical-properties-of-nanostructured-ni75fe25100-xsix-alloy-elaborated-by-mechanical-alloying" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/192107.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">27</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">6939</span> Growth Nanostructured CdO Thin Film via Solid-Vapor Deposition</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=A.%20S.%20Obaid">A. S. Obaid</a>, <a href="https://publications.waset.org/abstracts/search?q=K.%20H.%20T.%20Hassan"> K. H. T. Hassan</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20M.%20Asij"> A. M. Asij</a>, <a href="https://publications.waset.org/abstracts/search?q=B.%20M.%20Salih"> B. M. Salih</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20Bououdina"> M. Bououdina</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Cadmium Oxide (CdO) thin films have been prepared by vacuum evaporation method on Si (111) substrate at room temperature using CdCl2 as a source of Cd. Detailed structural properties of the films are presented using XRD and SEM. The films was pure polycrystalline CdO phase with high crystallinity. The lattice constant average crystallite size of the nanocrystalline CdO thin films were calculated. SEM image confirms the formation nanostructure. Energy dispersive X-ray analysis spectra of CdO thin films shows the presence of Cd and O peaks only, no additional peaks attributed to impurities or contamination are observed. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=nanostructured%20CdO" title="nanostructured CdO">nanostructured CdO</a>, <a href="https://publications.waset.org/abstracts/search?q=solid-vapor%20deposition" title=" solid-vapor deposition"> solid-vapor deposition</a>, <a href="https://publications.waset.org/abstracts/search?q=quantum%20size%20effect" title=" quantum size effect"> quantum size effect</a>, <a href="https://publications.waset.org/abstracts/search?q=cadmium%20oxide" title=" cadmium oxide"> cadmium oxide</a> </p> <a href="https://publications.waset.org/abstracts/24649/growth-nanostructured-cdo-thin-film-via-solid-vapor-deposition" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/24649.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">666</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">6938</span> The Effect of Deformation Activation Volume, Strain Rate Sensitivity and Processing Temperature of Grain Size Variants</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=P.%20B.%20Sob">P. B. Sob</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20A.%20Alugongo"> A. A. Alugongo</a>, <a href="https://publications.waset.org/abstracts/search?q=T.%20B.%20Tengen"> T. B. Tengen</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The activation volume of 6082T6 aluminum is investigated at different temperatures on grain size variants. The deformation activation volume was computed on the basis of the relationship between the Boltzmann’s constant k, the testing temperatures, the material strain rate sensitivity and the material yield stress of grain size variants. The material strain rate sensitivity is computed as a function of yield stress and strain rate of grain size variants. The effect of the material strain rate sensitivity and the deformation activation volume of 6082T6 aluminum at different temperatures of 3-D grain are discussed. It is shown that the strain rate sensitivities and activation volume are negative for the grain size variants during the deformation of nanostructured materials. It is also observed that the activation volume vary in different ways with the equivalent radius, semi minor axis radius, semi major axis radius and major axis radius. From the obtained results it is shown that the variation of activation volume increased and decreased with the testing temperature. It was revealed that, increased in strain rate sensitivity led to decrease in activation volume whereas increased in activation volume led to decrease in strain rate sensitivity. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=nanostructured%20materials" title="nanostructured materials">nanostructured materials</a>, <a href="https://publications.waset.org/abstracts/search?q=grain%20size%20variants" title=" grain size variants"> grain size variants</a>, <a href="https://publications.waset.org/abstracts/search?q=temperature" title=" temperature"> temperature</a>, <a href="https://publications.waset.org/abstracts/search?q=yield%20stress" title=" yield stress"> yield stress</a>, <a href="https://publications.waset.org/abstracts/search?q=strain%20rate%20sensitivity" title=" strain rate sensitivity"> strain rate sensitivity</a>, <a href="https://publications.waset.org/abstracts/search?q=activation%20volume" title=" activation volume"> activation volume</a> </p> <a href="https://publications.waset.org/abstracts/39079/the-effect-of-deformation-activation-volume-strain-rate-sensitivity-and-processing-temperature-of-grain-size-variants" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/39079.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">250</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">6937</span> SnSₓ, Cu₂ZnSnS₄ Nanostructured Thin Layers for Thin-Film Solar Cells</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Elena%20A.%20Outkina">Elena A. Outkina</a>, <a href="https://publications.waset.org/abstracts/search?q=Marina%20V.%20Meledina"> Marina V. Meledina</a>, <a href="https://publications.waset.org/abstracts/search?q=Aliaksandr%20A.%20Khodin"> Aliaksandr A. Khodin</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Nanostructured thin films of SnSₓ, Cu₂ZnSnS₄ (CZTS) semiconductors were fabricated by chemical processing to produce thin-film photoactive layers for photocells as a prospective lowest-cost and environment-friendly alternative to Si, Cu(In, Ga)Se₂, and other traditional solar cells materials. To produce SnSₓ layers, the modified successive ionic layer adsorption and reaction (SILAR) technique were investigated, including successive cyclic dipping into Na₂S solution and SnCl₂, NaCl, triethanolamine solution. To fabricate CZTS layers, the cyclic dipping into CuSO₄ with ZnSO₄, SnCl₂, and Na₂S solutions was used with intermediate rinsing in distilled water. The nano-template aluminum/alumina substrate was used to control deposition processes. Micromorphology and optical characteristics of the fabricated layers have been investigated. Analysis of 2D-like layers deposition features using nano-template substrate is presented, including the effect of nanotips in a template on surface charge redistribution and transport. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=kesterite" title="kesterite">kesterite</a>, <a href="https://publications.waset.org/abstracts/search?q=nanotemplate" title=" nanotemplate"> nanotemplate</a>, <a href="https://publications.waset.org/abstracts/search?q=SILAR" title=" SILAR"> SILAR</a>, <a href="https://publications.waset.org/abstracts/search?q=solar%20cell" title=" solar cell"> solar cell</a>, <a href="https://publications.waset.org/abstracts/search?q=tin%20sulphide" title=" tin sulphide"> tin sulphide</a> </p> <a href="https://publications.waset.org/abstracts/117750/sns-cu2znsns4-nanostructured-thin-layers-for-thin-film-solar-cells" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/117750.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">142</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">6936</span> Formation of Nanostructured Surface Layers of a Material with TiNi-Based Shape Memory by Diffusion Metallization</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Zh.%20M.%20Blednova">Zh. M. Blednova</a>, <a href="https://publications.waset.org/abstracts/search?q=P.%20O.%20Rusinov"> P. O. Rusinov</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Results of research on the formation of the surface layers of a material with shape memory effect (SME) based on TiNi diffusion metallization in molten Pb-Bi under isothermal conditions in an argon atmosphere are presented. It is shown that this method allows obtaining of uniform surface layers in nanostructured state of internal surfaces on the articles of complex shapes with stress concentrators. Structure, chemical and phase composition of the surface layers provide a manifestation of TiNi shape memory. The average grain size of TiNi coatings ranges between 60 ÷ 160 nm. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=diffusion%20metallization" title="diffusion metallization">diffusion metallization</a>, <a href="https://publications.waset.org/abstracts/search?q=nikelid%20titanium%20surface%20layers" title=" nikelid titanium surface layers"> nikelid titanium surface layers</a>, <a href="https://publications.waset.org/abstracts/search?q=shape%20memory%20effect" title=" shape memory effect"> shape memory effect</a>, <a href="https://publications.waset.org/abstracts/search?q=nanostructures" title=" nanostructures"> nanostructures</a> </p> <a href="https://publications.waset.org/abstracts/9419/formation-of-nanostructured-surface-layers-of-a-material-with-tini-based-shape-memory-by-diffusion-metallization" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/9419.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">324</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">6935</span> Characterization of Nanostructured and Conventional TiAlN and AlCrN Coated ASTM-SA213-T-11 Boiler Steel </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Vikas%20Chawla">Vikas Chawla</a>, <a href="https://publications.waset.org/abstracts/search?q=Buta%20Singh%20Sidhu"> Buta Singh Sidhu</a>, <a href="https://publications.waset.org/abstracts/search?q=Amita%20Rani"> Amita Rani</a>, <a href="https://publications.waset.org/abstracts/search?q=Amit%20Handa"> Amit Handa</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The main objective of the present work is microstructural and mechanical characterization of the conventional and nanostructured TiAlN and AlCrN coatings deposited on T-11 boiler steel. In case of conventional coatings, Al-Cr and Ti-Al metallic powders were deposited using plasma spray process followed by gas nitriding of the surface which was done in the lab with optimized parameters after conducting several trials on plasma-sprayed coated specimens. The physical vapor deposition process (PAPVD) was employed for depositing nanostructured TiAlN and AlCrN coatings. The field emission scanning electron microscopy (FE-SEM) with energy dispersive X-ray analysis (EDAX) attachment, X-ray diffraction (XRD) analysis, atomic force microscopy (AFM) analysis and the X-Ray mapping analysis techniques have been used to study surface and cross-sectional morphology of the coatings. The surface roughness and micro-hardness were also measured. A good adhesion of the conventional thick TiAlN and AlCrN coatings was found. The coatings under study are recommended for the applications to super-heater and re-heater tubes of the boilers based upon the outcomes of the research work. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=nanostructure" title="nanostructure">nanostructure</a>, <a href="https://publications.waset.org/abstracts/search?q=physical%20vapour%20deposition" title=" physical vapour deposition"> physical vapour deposition</a>, <a href="https://publications.waset.org/abstracts/search?q=oxides" title=" oxides"> oxides</a>, <a href="https://publications.waset.org/abstracts/search?q=thin%20films" title=" thin films"> thin films</a>, <a href="https://publications.waset.org/abstracts/search?q=electron%20microscopy" title=" electron microscopy"> electron microscopy</a> </p> <a href="https://publications.waset.org/abstracts/112764/characterization-of-nanostructured-and-conventional-tialn-and-alcrn-coated-astm-sa213-t-11-boiler-steel" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/112764.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">140</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">6934</span> Exchange Bias in Ceramics: From Polyol Made CoFe₂O₄-core@CoO-Shell NPs to Nanostructured Ceramics</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=N.%20Flores-Martinez">N. Flores-Martinez</a>, <a href="https://publications.waset.org/abstracts/search?q=G.%20Franceschin"> G. Franceschin</a>, <a href="https://publications.waset.org/abstracts/search?q=T.%20Gaudisson"> T. Gaudisson</a>, <a href="https://publications.waset.org/abstracts/search?q=J.-M.%20Greneche"> J.-M. Greneche</a>, <a href="https://publications.waset.org/abstracts/search?q=R.%20Valenzuela-Monjaras"> R. Valenzuela-Monjaras</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20Ammar"> S. Ammar</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Tailoring bulk materials keeping their nanoscale properties is the daydream of material scientists. But especially in magnetism, this single desire can revolutionize our everyday life. Now, thanks to the methods of synthesis, based on the combination of colloidal chemistry (CC) to flash sintering (FS), customizing magnets becomes each time more 'easy', 'cheap' and 'clean'. Although by CC we can obtain straightway nanopowders with good magnetic featuring, like exchange bias (EB) phenomenon, it does not result so attractive for applications. Since a solid material is simple to manipulate and integrate in a device, many consolidation methods have been tested aiming to keep the nanopowders characteristics after consolidation. Unfortunately, the lack of structural crystalline arrangement and the grain growth worsen the magnetic properties. In this work, we exhibit, for the first-time author’s best knowledge, the EB in sintered ceramics, starting from CoFe₂O₄-core@CoO-shell NPs obtained by CC. Despite the fact that EB field is about 28 mT in ceramics and it is not yet considered for applications, this work opens an alternative in the permanent magnets fabrication through a FS method, the spark plasma sintering, starting from CC synthesized nanopowders. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=core-shell%20nanoparticles" title="core-shell nanoparticles">core-shell nanoparticles</a>, <a href="https://publications.waset.org/abstracts/search?q=exchange%20bias" title=" exchange bias"> exchange bias</a>, <a href="https://publications.waset.org/abstracts/search?q=nanostructured%20ceramics" title=" nanostructured ceramics"> nanostructured ceramics</a>, <a href="https://publications.waset.org/abstracts/search?q=spark%20plasma%20sintering" title=" spark plasma sintering"> spark plasma sintering</a> </p> <a href="https://publications.waset.org/abstracts/99792/exchange-bias-in-ceramics-from-polyol-made-cofe2o4-core-at-coo-shell-nps-to-nanostructured-ceramics" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/99792.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">148</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">6933</span> X-Ray Diffraction and Mӧssbauer Studies of Nanostructured Ni45Al45Fe10 Powders Elaborated by Mechanical Alloying</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=N.%20Ammouchi">N. Ammouchi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> We have studied the effect of milling time on the structural and hyperfine properties of Ni45Al45Fe10 compound elaborated by mechanical alloying. The elaboration was performed by using the planetary ball mill at different milling times. The as milled powders were characterized by X-ray diffraction (XRD) and Mӧssbauer spectroscopy. From XRD diffraction spectra, we show that the β NiAl(Fe) was completely formed after 24 h of milling time. When the milling time increases, the lattice parameter increases, whereas the grain size decreases to a few nanometres and the mean level of microstrains increases. The analysis of Mӧssbauer spectra indicates that, in addition to a ferromagnetic phase, α-Fe, a paramagnetic disordered phase Ni Al (Fe) solid solution is observed after 2h and only this phase is present after 12h. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=NiAlFe" title="NiAlFe">NiAlFe</a>, <a href="https://publications.waset.org/abstracts/search?q=nanostructured%20powders" title=" nanostructured powders"> nanostructured powders</a>, <a href="https://publications.waset.org/abstracts/search?q=X-ray%20diffraction" title=" X-ray diffraction"> X-ray diffraction</a>, <a href="https://publications.waset.org/abstracts/search?q=M%D3%A7ssbauer%20spectroscopy" title=" Mӧssbauer spectroscopy"> Mӧssbauer spectroscopy</a> </p> <a href="https://publications.waset.org/abstracts/17005/x-ray-diffraction-and-mssbauer-studies-of-nanostructured-ni45al45fe10-powders-elaborated-by-mechanical-alloying" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/17005.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">379</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">6932</span> Hysteresis Behavior and Microstructure in Nanostructured Alloys Cu-Fe and Cu-Fe-Co</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Laslouni%20Warda">Laslouni Warda</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20Azzaz"> M. Azzaz</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The intermetallic-based on transition metal compounds present interesting magnetic properties for the technological applications (permanent magnets, magnetic recording…). Cu70 Fe18Co12 and Cu70 Fe30 nanostructured with crystallite size vary from 10 a 12 nanometers have been developed by a mechanical milling method. For Cu-Fe samples, the iron and copper distribution was clear. The distribution showed a homogeneous distribution of iron and copper in a Cu-Fe obtained after 36 h milling. The structural properties have been performed with X-ray diffraction. With increasing milling times, Fe and Co diffuse into the Cu matrix, which accelerates the formation of the magnetic nanostructure Cu- Fe-Co and Cu-Fe alloys. The magnetic behavior is investigated using Vibrating Sample Magnetometer (VSM). The two alloys nanocrystals possess ferromagnetic character at room temperature <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Cu-Fe-Co" title="Cu-Fe-Co">Cu-Fe-Co</a>, <a href="https://publications.waset.org/abstracts/search?q=Cu-Fe" title=" Cu-Fe"> Cu-Fe</a>, <a href="https://publications.waset.org/abstracts/search?q=nanocrystals" title=" nanocrystals"> nanocrystals</a>, <a href="https://publications.waset.org/abstracts/search?q=SEM" title=" SEM"> SEM</a>, <a href="https://publications.waset.org/abstracts/search?q=hysteresis%20loops" title=" hysteresis loops"> hysteresis loops</a>, <a href="https://publications.waset.org/abstracts/search?q=VSM" title=" VSM"> VSM</a>, <a href="https://publications.waset.org/abstracts/search?q=anisotropy%20theory" title=" anisotropy theory"> anisotropy theory</a> </p> <a href="https://publications.waset.org/abstracts/41508/hysteresis-behavior-and-microstructure-in-nanostructured-alloys-cu-fe-and-cu-fe-co" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/41508.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">334</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">6931</span> Study of Nanocrystalline Al Doped Zns Thin Films by Chemical Bath Deposition Method</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Hamid%20Merzouk">Hamid Merzouk</a>, <a href="https://publications.waset.org/abstracts/search?q=Djahida%20Touati-Talantikite"> Djahida Touati-Talantikite</a>, <a href="https://publications.waset.org/abstracts/search?q=Amina%20Zaabar"> Amina Zaabar</a> </p> <p class="card-text"><strong>Abstract:</strong></p> New nanosized materials are in huge expansion worldwide. They play a fundamental role in various industrial applications thanks their unique and functional properties. Moreover, in recent years, a great effort has been made to the design and control fabrication of nanostructured semiconductors such zinc sulphide. In recent years, much attention has been accorded in doped and co-doped ZnS to improve the ZnS films quality. We present in this work the preparation and characterization of ZnS and Al doped ZnS thin films. Nanoparticles ZnS and Al doped ZnS films are prepared by chemical bath deposition method (CBD), for various dopant concentrations. Thin films are deposed onto commercial microscope glass slides substrates. Thiourea is used as sulfide ion source, zinc acetate as zinc ion source and manganese acetate as manganese ion source in alkaline bath at 90 °C. X-ray diffraction (XRD) analyses are carried out at room temperature on films and powders with a powder diffractometer, using CuKα radiation. The average grain size obtained from the Debye–Scherrer’s formula is around 10 nm. Films morphology is examined by scanning electron microscopy. IR spectra of representative sample are recorded with the FTIR between 400 and 4000 cm-1.The transmittance (70 %) is performed with the UV–VIS spectrometer in the wavelength range 200–800 nm. This value is enhanced by Al doping. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=ZnS" title="ZnS">ZnS</a>, <a href="https://publications.waset.org/abstracts/search?q=nanostructured%20semiconductors" title=" nanostructured semiconductors"> nanostructured semiconductors</a>, <a href="https://publications.waset.org/abstracts/search?q=thin%20films" title=" thin films"> thin films</a>, <a href="https://publications.waset.org/abstracts/search?q=chemical%20bath%20deposition" title=" chemical bath deposition"> chemical bath deposition</a> </p> <a href="https://publications.waset.org/abstracts/17656/study-of-nanocrystalline-al-doped-zns-thin-films-by-chemical-bath-deposition-method" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/17656.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">524</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">6930</span> Nanoparticles Modification by Grafting Strategies for the Development of Hybrid Nanocomposites</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Irati%20Barandiaran">Irati Barandiaran</a>, <a href="https://publications.waset.org/abstracts/search?q=Xabier%20Velasco-Iza"> Xabier Velasco-Iza</a>, <a href="https://publications.waset.org/abstracts/search?q=Galder%20Kortaberria"> Galder Kortaberria</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Hybrid inorganic/organic nanostructured materials based on block copolymers are of considerable interest in the field of Nanotechnology, taking into account that these nanocomposites combine the properties of polymer matrix and the unique properties of the added nanoparticles. The use of block copolymers as templates offers the opportunity to control the size and the distribution of inorganic nanoparticles. This research is focused on the surface modification of inorganic nanoparticles to reach a good interface between nanoparticles and polymer matrices which hinders the nanoparticle aggregation. The aim of this work is to obtain a good and selective dispersion of Fe3O4 magnetic nanoparticles into different types of block copolymers such us, poly(styrene-b-methyl methacrylate) (PS-b-PMMA), poly(styrene-b-ε-caprolactone) (PS-b-PCL) poly(isoprene-b-methyl methacrylate) (PI-b-PMMA) or poly(styrene-b-butadiene-b-methyl methacrylate) (SBM) by using different grafting strategies. Fe3O4 magnetic nanoparticles have been surface-modified with polymer or block copolymer brushes following different grafting methods (grafting to, grafting from and grafting through) to achieve a selective location of nanoparticles into desired domains of the block copolymers. Morphology of fabricated hybrid nanocomposites was studied by means of atomic force microscopy (AFM) and with the aim to reach well-ordered nanostructured composites different annealing methods were used. Additionally, nanoparticle amount has been also varied in order to investigate the effect of the nanoparticle content in the morphology of the block copolymer. Nowadays different characterization methods were using in order to investigate magnetic properties of nanometer-scale electronic devices. Particularly, two different techniques have been used with the aim of characterizing synthesized nanocomposites. First, magnetic force microscopy (MFM) was used to investigate qualitatively the magnetic properties taking into account that this technique allows distinguishing magnetic domains on the sample surface. On the other hand, magnetic characterization by vibrating sample magnetometer and superconducting quantum interference device. This technique demonstrated that magnetic properties of nanoparticles have been transferred to the nanocomposites, exhibiting superparamagnetic behavior similar to that of the maghemite nanoparticles at room temperature. Obtained advanced nanostructured materials could found possible applications in the field of dye-sensitized solar cells and electronic nanodevices. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=atomic%20force%20microscopy" title="atomic force microscopy">atomic force microscopy</a>, <a href="https://publications.waset.org/abstracts/search?q=block%20copolymers" title=" block copolymers"> block copolymers</a>, <a href="https://publications.waset.org/abstracts/search?q=grafting%20techniques" title=" grafting techniques"> grafting techniques</a>, <a href="https://publications.waset.org/abstracts/search?q=iron%20oxide%20nanoparticles" title=" iron oxide nanoparticles"> iron oxide nanoparticles</a> </p> <a href="https://publications.waset.org/abstracts/56614/nanoparticles-modification-by-grafting-strategies-for-the-development-of-hybrid-nanocomposites" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/56614.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">262</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">6929</span> Nanostructured Transition Metal Oxides Doped Graphene for High Performance Solid-State Supercapacitor Electrodes</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=G.%20Nyongombe">G. Nyongombe</a>, <a href="https://publications.waset.org/abstracts/search?q=Guy%20L.%20Kabongo"> Guy L. Kabongo</a>, <a href="https://publications.waset.org/abstracts/search?q=B.%20M.%20Mothudi"> B. M. Mothudi</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20S.%20%20Dhlamini"> M. S. Dhlamini</a> </p> <p class="card-text"><strong>Abstract:</strong></p> A series of Transition Metals Oxides (TMOs) doped graphene were synthesized and successfully used as supercapacitor electrode materials. The as-synthesized materials exhibited exceptional electrochemical properties owing to the combined properties of its constituents; high surface area and good conductivity were achieved. Several analytical characterization techniques were employed to investigate the morphology, crystal structure atomic arrangement and elemental chemical state in the materials for which scanning electron microscopy (SEM), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) were conducted, respectively. Moreover, the electrochemical properties of the as-synthesized materials were examined by performing cyclic voltammetry (CV), galvanostatic charge-discharge (GCD) and electrochemical impedance spectroscopy (EIS) measurements. Furthermore, the effect of doping concentration on the interlayer distance of the graphene materials and the charge transfer resistance are investigated and correlated to the exceptional current density which was multiplied by a factor of ~80 after TMOs doping in graphene. Finally, the resulting high capacitance obtained confirms the contribution of grapheme exceptional electronic conductivity and large surface area on the electrode materials. Such good-performing electrode materials are highly promising for supercapacitors and other energy storage devices. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=energy%20density" title="energy density">energy density</a>, <a href="https://publications.waset.org/abstracts/search?q=graphene" title=" graphene"> graphene</a>, <a href="https://publications.waset.org/abstracts/search?q=supercapacitors" title=" supercapacitors"> supercapacitors</a>, <a href="https://publications.waset.org/abstracts/search?q=TMOs" title=" TMOs"> TMOs</a> </p> <a href="https://publications.waset.org/abstracts/84803/nanostructured-transition-metal-oxides-doped-graphene-for-high-performance-solid-state-supercapacitor-electrodes" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/84803.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">258</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">6928</span> Information Visualization Methods Applied to Nanostructured Biosensors</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Osvaldo%20N.%20Oliveira%20Jr.">Osvaldo N. Oliveira Jr.</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The control of molecular architecture inherent in some experimental methods to produce nanostructured films has had great impact on devices of various types, including sensors and biosensors. The self-assembly monolayers (SAMs) and the electrostatic layer-by-layer (LbL) techniques, for example, are now routinely used to produce tailored architectures for biosensing where biomolecules are immobilized with long-lasting preserved activity. Enzymes, antigens, antibodies, peptides and many other molecules serve as the molecular recognition elements for detecting an equally wide variety of analytes. The principles of detection are also varied, including electrochemical methods, fluorescence spectroscopy and impedance spectroscopy. In this presentation an overview will be provided of biosensors made with nanostructured films to detect antibodies associated with tropical diseases and HIV, in addition to detection of analytes of medical interest such as cholesterol and triglycerides. Because large amounts of data are generated in the biosensing experiments, use has been made of computational and statistical methods to optimize performance. Multidimensional projection techniques such as Sammon´s mapping have been shown more efficient than traditional multivariate statistical analysis in identifying small concentrations of anti-HIV antibodies and for distinguishing between blood serum samples of animals infected with two tropical diseases, namely Chagas´ disease and Leishmaniasis. Optimization of biosensing may include a combination of another information visualization method, the Parallel Coordinate technique, with artificial intelligence methods in order to identify the most suitable frequencies for reaching higher sensitivity using impedance spectroscopy. Also discussed will be the possible convergence of technologies, through which machine learning and other computational methods may be used to treat data from biosensors within an expert system for clinical diagnosis. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=clinical%20diagnosis" title="clinical diagnosis">clinical diagnosis</a>, <a href="https://publications.waset.org/abstracts/search?q=information%20visualization" title=" information visualization"> information visualization</a>, <a href="https://publications.waset.org/abstracts/search?q=nanostructured%20films" title=" nanostructured films"> nanostructured films</a>, <a href="https://publications.waset.org/abstracts/search?q=layer-by-layer%20technique" title=" layer-by-layer technique "> layer-by-layer technique </a> </p> <a href="https://publications.waset.org/abstracts/19287/information-visualization-methods-applied-to-nanostructured-biosensors" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/19287.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">337</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">6927</span> Development of capsaicin-loaded nanostructured lipid carriers for topical application</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Kwanputtha%20Arunprasert">Kwanputtha Arunprasert</a>, <a href="https://publications.waset.org/abstracts/search?q=Chaiyakarn%20Pornpitchanarong"> Chaiyakarn Pornpitchanarong</a>, <a href="https://publications.waset.org/abstracts/search?q=Praneet%20Opanasopit"> Praneet Opanasopit</a>, <a href="https://publications.waset.org/abstracts/search?q="></a>, <a href="https://publications.waset.org/abstracts/search?q=Prasopchai%20Patrojanasophon">Prasopchai Patrojanasophon</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Capsaicin, a recently FDA-approved drug for the topical treatment of neuropathic pain, is associated with several side effects like burning sensation and erythema leading to severe skin irritation and poor patient compliance. These unwanted side effects are due to the rapid penetration of capsaicin into the epidermis and low permeation to the dermis layer. The purpose of this study was to develop nanostructured lipid carriers (NLCs) that entrapped capsaicin for reducing dermal irritation. Solid lipid (glyceryl monostearate (GM), cetyl palmitate (CP), cetyl alcohol (COH), stearic acid (SA), and stearyl alcohol (SOH)) and surfactant (Tween®80, Tween®20, and Span®20) were varied to obtained optimal capsaicin-loaded NLCs. The formulation using CP as solid lipid and Tween®80 as a surfactant (F2) demonstrated the smallest size, excellent colloidal stability, and narrow range distribution of the particles as being analyzed using Zetasizer. The obtained capsaicin-loaded NLCs were then characterized by entrapment efficiency (EE) and loading capacity (LC). The release characteristics followed Higuchi kinetics, and the prolonged capsaicin release may result in the reduction in skin irritation. These results could demonstrate the potentials of capsaicinloaded lipid-based nanoparticles for topical drug delivery. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=capsaicin" title="capsaicin">capsaicin</a>, <a href="https://publications.waset.org/abstracts/search?q=lipid-based%20nanoparticles" title=" lipid-based nanoparticles"> lipid-based nanoparticles</a>, <a href="https://publications.waset.org/abstracts/search?q=nanostructured%20lipid%20carriers" title=" nanostructured lipid carriers"> nanostructured lipid carriers</a>, <a href="https://publications.waset.org/abstracts/search?q=topical%20drug%20delivery%20system" title=" topical drug delivery system"> topical drug delivery system</a> </p> <a href="https://publications.waset.org/abstracts/179761/development-of-capsaicin-loaded-nanostructured-lipid-carriers-for-topical-application" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/179761.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">76</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">6926</span> Preparation of Novel Silicone/Graphene-based Nanostructured Surfaces as Fouling Release Coatings</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mohamed%20S.%20Selim">Mohamed S. Selim</a>, <a href="https://publications.waset.org/abstracts/search?q=Nesreen%20A.%20Fatthallah"> Nesreen A. Fatthallah</a>, <a href="https://publications.waset.org/abstracts/search?q=Shimaa%20A.%20Higazy"> Shimaa A. Higazy</a>, <a href="https://publications.waset.org/abstracts/search?q=Zhifeng%20Hao"> Zhifeng Hao</a>, <a href="https://publications.waset.org/abstracts/search?q=Ping%20Jing%20Mo"> Ping Jing Mo</a> </p> <p class="card-text"><strong>Abstract:</strong></p> As marine fouling-release (FR) surfaces, two new superhydrophobic nanocomposite series of polydimethylsiloxane (PDMS) loaded with reduced graphene oxide (RGO) and graphene oxide/boehmite nanorods (GO-γ-AlOOH) nanofillers were created. The self-cleaning and antifouling capabilities were modified by controlling the nanofillers' shapes and distribution in the silicone matrix. With an average diameter of 10-20 nm and a length of 200 nm, γ-AlOOH nanorods showed a single crystallinity. RGO was made using a hydrothermal process, whereas GO-γ-AlOOH nanocomposites were made using a chemical deposition method for use as fouling-release coating materials. These nanofillers were disseminated in the silicone matrix using the solution casting method to explore the synergetic effects of graphene-based materials on the surface, mechanical, and FR characteristics. Water contact angle (WCA), scanning electron, and atomic force microscopes were used to investigate the surface's hydrophobicity and antifouling capabilities (SEM and AFM). The roughness, superhydrophobicity, and surface mechanical characteristics of coatings all increased the homogeneity of the nanocomposite dispersion. To examine the antifouling effects of the coating systems, laboratory tests were conducted for 30 days using specified bacteria.PDMS/GO-γ-AlOOH nanorod composite demonstrated superior antibacterial efficacy against several bacterial strains than PDMS/RGO nanocomposite. The high surface area and stabilizing effects of the GO-γ-AlOOH hybrid nanofillers are to blame for this. The biodegradability percentage of the PDMS/GO-γ-AlOOH nanorod composite (3 wt.%) was the lowest (1.6%), while the microbial endurability percentages for gram-positive, gram-negative, and fungi were 86.42%, 97.94%, and 85.97%, respectively. The homogeneity of the GO-γ-AlOOH (3 wt.%) dispersion, which had a WCA of 151° and a rough surface, was the most profound superhydrophobic antifouling nanostructured coating. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=superhydrophobic%20nanocomposite" title="superhydrophobic nanocomposite">superhydrophobic nanocomposite</a>, <a href="https://publications.waset.org/abstracts/search?q=fouling%20release" title=" fouling release"> fouling release</a>, <a href="https://publications.waset.org/abstracts/search?q=nanofillers" title=" nanofillers"> nanofillers</a>, <a href="https://publications.waset.org/abstracts/search?q=surface%20coating" title=" surface coating"> surface coating</a> </p> <a href="https://publications.waset.org/abstracts/142921/preparation-of-novel-siliconegraphene-based-nanostructured-surfaces-as-fouling-release-coatings" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/142921.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">234</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">6925</span> 3-D Strain Imaging of Nanostructures Synthesized via CVD</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Sohini%20Manna">Sohini Manna</a>, <a href="https://publications.waset.org/abstracts/search?q=Jong%20Woo%20Kim"> Jong Woo Kim</a>, <a href="https://publications.waset.org/abstracts/search?q=Oleg%20Shpyrko"> Oleg Shpyrko</a>, <a href="https://publications.waset.org/abstracts/search?q=Eric%20E.%20Fullerton"> Eric E. Fullerton</a> </p> <p class="card-text"><strong>Abstract:</strong></p> CVD techniques have emerged as a promising approach in the formation of a broad range of nanostructured materials. The realization of many practical applications will require efficient and economical synthesis techniques that preferably avoid the need for templates or costly single-crystal substrates and also afford process adaptability. Towards this end, we have developed a single-step route for the reduction-type synthesis of nanostructured Ni materials using a thermal CVD method. By tuning the CVD growth parameters, we can synthesize morphologically dissimilar nanostructures including single-crystal cubes and Au nanostructures which form atop untreated amorphous SiO2||Si substrates. An understanding of the new properties that emerge in these nanostructures materials and their relationship to function will lead to for a broad range of magnetostrictive devices as well as other catalysis, fuel cell, sensor, and battery applications based on high-surface-area transition-metal nanostructures. We use coherent X-ray diffraction imaging technique to obtain 3-D image and strain maps of individual nanocrystals. Coherent x-ray diffractive imaging (CXDI) is a technique that provides the overall shape of a nanostructure and the lattice distortion based on the combination of highly brilliant coherent x-ray sources and phase retrieval algorithm. We observe a fine interplay of reduction of surface energy vs internal stress, which plays an important role in the morphology of nano-crystals. The strain distribution is influenced by the metal-substrate interface and metal-air interface, which arise due to differences in their thermal expansion. We find the lattice strain at the surface of the octahedral gold nanocrystal agrees well with the predictions of the Young-Laplace equation quantitatively, but exhibits a discrepancy near the nanocrystal-substrate interface resulting from the interface. The strain in the bottom side of the Ni nanocube, which is contacted on the substrate surface is compressive. This is caused by dissimilar thermal expansion coefficients between Ni nanocube and Si substrate. Research at UCSD support by NSF DMR Award # 1411335. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=CVD" title="CVD">CVD</a>, <a href="https://publications.waset.org/abstracts/search?q=nanostructures" title=" nanostructures"> nanostructures</a>, <a href="https://publications.waset.org/abstracts/search?q=strain" title=" strain"> strain</a>, <a href="https://publications.waset.org/abstracts/search?q=CXRD" title=" CXRD"> CXRD</a> </p> <a href="https://publications.waset.org/abstracts/47185/3-d-strain-imaging-of-nanostructures-synthesized-via-cvd" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/47185.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">392</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">6924</span> Study of the Impact of Synthesis Method and Chemical Composition on Photocatalytic Properties of Cobalt Ferrite Catalysts</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Katerina%20Zaharieva">Katerina Zaharieva</a>, <a href="https://publications.waset.org/abstracts/search?q=Vicente%20Rives"> Vicente Rives</a>, <a href="https://publications.waset.org/abstracts/search?q=Martin%20Tsvetkov"> Martin Tsvetkov</a>, <a href="https://publications.waset.org/abstracts/search?q=Raquel%20Trujillano"> Raquel Trujillano</a>, <a href="https://publications.waset.org/abstracts/search?q=Boris%20Kunev"> Boris Kunev</a>, <a href="https://publications.waset.org/abstracts/search?q=Ivan%20Mitov"> Ivan Mitov</a>, <a href="https://publications.waset.org/abstracts/search?q=Maria%20Milanova"> Maria Milanova</a>, <a href="https://publications.waset.org/abstracts/search?q=Zara%20Cherkezova-Zheleva"> Zara Cherkezova-Zheleva </a> </p> <p class="card-text"><strong>Abstract:</strong></p> The nanostructured cobalt ferrite-type materials Sample A - Co0.25Fe2.75O4, Sample B - Co0.5Fe2.5O4, and Sample C - CoFe2O4 were prepared by co-precipitation in our previous investigations. The co-precipitated Sample B and Sample C were mechanochemically activated in order to produce Sample D - Co0.5Fe2.5O4 and Sample E- CoFe2O4. The PXRD, Moessbauer and FTIR spectroscopies, specific surface area determination by the BET method, thermal analysis, element chemical analysis and temperature-programmed reduction were used to investigate the prepared nano-sized samples. The changes of the Malachite green dye concentration during reaction of the photocatalytic decolorization using nanostructured cobalt ferrite-type catalysts with different chemical composition are included. The photocatalytic results show that the increase in the degree of incorporation of cobalt ions in the magnetite host structure for co-precipitated cobalt ferrite-type samples results in an increase of the photocatalytic activity: Sample A (4 х10-3 min-1) < Sample B (5 х10-3 min-1) < Sample C (7 х10-3 min-1). Mechanochemically activated photocatalysts showed a higher activity than the co-precipitated ferrite materials: Sample D (16 х10-3 min-1) > Sample E (14 х10-3 min-1) > Sample C (7 х10-3 min-1) > Sample B (5 х10-3 min-1) > Sample A (4 х10-3 min-1). On decreasing the degree of substitution of iron ions by cobalt ones a higher sorption ability of the dye after the dark period for the co-precipitated cobalt ferrite materials was observed: Sample C (72 %) < Sample B (78 %) < Sample A (80 %). Mechanochemically treated ferrite catalysts and co-precipitated Sample B possess similar sorption capacities, Sample D (78 %) ~ Sample E (78 %) ~ Sample B (78 %). The prepared nano-sized cobalt ferrite-type materials demonstrate good photocatalytic and sorption properties. Mechanochemically activated Sample D - Co0.5Fe2.5O4 (16х10-3 min-1) and Sample E-CoFe2O4 (14х10-3 min-1) possess higher photocatalytic activity than that of the most common used UV-light catalyst Degussa P25 (12х10-3 min-1). The dependence of the photo-catalytic activity and sorption properties on the preparation method and different degree of substitution of iron ions by cobalt ions in synthesized cobalt ferrite samples is established. The mechanochemical activation leads to formation of nano-structured cobalt ferrite-type catalysts (Sample D and Sample E) with higher rate constants than those of the ferrite materials (Sample A, Sample B, and Sample C) prepared by the co-precipitation procedure. The increase in the degree of substitution of iron ions by cobalt ones leads to improved photocatalytic properties and lower sorption capacities of the co-precipitated ferrite samples. The good sorption properties between 72 and 80% of the prepared ferrite-type materials show that they could be used as potential cheap absorbents for purification of polluted waters. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=nanodimensional%20cobalt%20ferrites" title="nanodimensional cobalt ferrites">nanodimensional cobalt ferrites</a>, <a href="https://publications.waset.org/abstracts/search?q=photocatalyst" title=" photocatalyst"> photocatalyst</a>, <a href="https://publications.waset.org/abstracts/search?q=synthesis" title=" synthesis"> synthesis</a>, <a href="https://publications.waset.org/abstracts/search?q=mechanochemical%20activation" title=" mechanochemical activation "> mechanochemical activation </a> </p> <a href="https://publications.waset.org/abstracts/7240/study-of-the-impact-of-synthesis-method-and-chemical-composition-on-photocatalytic-properties-of-cobalt-ferrite-catalysts" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/7240.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">264</span> </span> </div> </div> <ul class="pagination"> <li class="page-item disabled"><span class="page-link">&lsaquo;</span></li> <li class="page-item active"><span class="page-link">1</span></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=nanostructured%20materials&page=2">2</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=nanostructured%20materials&page=3">3</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=nanostructured%20materials&page=4">4</a></li> <li class="page-item"><a class="page-link" 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