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carbon nanotubes</title> <meta name="description" content="Search results for: multi walled carbon nanotubes"> <meta name="keywords" content="multi walled carbon nanotubes"> <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="multi walled carbon nanotubes"> <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> 7146</div> </div> </div> </div> <h1 class="mt-3 mb-3 text-center" style="font-size:1.6rem;">Search results for: multi walled carbon nanotubes</h1> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">6966</span> Finite Element Analysis of Cold Formed Steel Screwed Connections </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Jikhil%20Joseph">Jikhil Joseph</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20R.%20Satish%20Kumar"> S. R. Satish Kumar</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Steel Structures are commonly used for rapid erections and multistory constructions due to its inherent advantages. However, the high accuracy required in detailing and heavier sections, make it difficult to erect in place and transport. Cold Formed steel which are specially made by reducing carbon and other alloys are used nowadays to make thin-walled structures. Various types of connections are being reported as well as practiced for the thin-walled members such as bolting, riveting, welding and other mechanical connections. Commonly self-drilling screw connections are used for cold-formed purlin sheeting connection. In this paper an attempt is made to develop a moment resting frame which can be rapidly and remotely constructed with thin walled sections and self-drilling screws. Semi-rigid Moment connections are developed with Rectangular thin-walled tubes and the screws. The Finite Element Analysis programme ABAQUS is used for modelling the screwed connections. The various modelling procedures for simulating the connection behavior such as tie-constraint model, oriented spring model and solid interaction modelling are compared and are critically reviewed. From the experimental validations the solid-interaction modelling identified to be the most accurate one and are used for predicting the connection behaviors. From the finite element analysis, hysteresis curves and the modes of failure were identified. Parametric studies were done on the connection model to optimize the connection configurations to get desired connection characteristics. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=buckling" title="buckling">buckling</a>, <a href="https://publications.waset.org/abstracts/search?q=cold%20formed%20steel" title=" cold formed steel"> cold formed steel</a>, <a href="https://publications.waset.org/abstracts/search?q=finite%20element%20analysis" title=" finite element analysis"> finite element analysis</a>, <a href="https://publications.waset.org/abstracts/search?q=screwed%20connections" title=" screwed connections"> screwed connections</a> </p> <a href="https://publications.waset.org/abstracts/83350/finite-element-analysis-of-cold-formed-steel-screwed-connections" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/83350.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">187</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">6965</span> Carbon Nanotube-Based Catalyst Modification to Improve Proton Exchange Membrane Fuel Cell Interlayer Interactions</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ling%20Ai">Ling Ai</a>, <a href="https://publications.waset.org/abstracts/search?q=Ziyu%20Zhao"> Ziyu Zhao</a>, <a href="https://publications.waset.org/abstracts/search?q=Zeyu%20Zhou"> Zeyu Zhou</a>, <a href="https://publications.waset.org/abstracts/search?q=Xiaochen%20Yang"> Xiaochen Yang</a>, <a href="https://publications.waset.org/abstracts/search?q=Heng%20Zhai"> Heng Zhai</a>, <a href="https://publications.waset.org/abstracts/search?q=Stuart%20Holmes"> Stuart Holmes</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Optimizing the catalyst layer structure is crucial for enhancing the performance of proton exchange membrane fuel cells (PEMFCs) with low Platinum (Pt) loading. Current works focused on the utilization, durability, and site activity of Pt particles on support, and performance enhancement has been achieved by loading Pt onto porous support with different morphology, such as graphene, carbon fiber, and carbon black. Some schemes have also incorporated cost considerations to achieve lower Pt loading. However, the design of the catalyst layer (CL) structure in the membrane electrode assembly (MEA) must consider the interactions between the layers. Addressing the crucial aspects of water management, low contact resistance, and the establishment of effective three-phase boundary for MEA, multi-walled carbon nanotubes (MWCNTs) are promising CL support due to their intrinsically high hydrophobicity, high axial electrical conductivity, and potential for ordered alignment. However, the drawbacks of MWCNTs, such as strong agglomeration, wall surface chemical inertness, and unopened ends, are unfavorable for Pt nanoparticle loading, which is detrimental to MEA processing and leads to inhomogeneous CL surfaces. This further deteriorates the utilization of Pt and increases the contact resistance. Robust chemical oxidation or nitrogen doping can introduce polar functional groups onto the surface of MWCNTs, facilitating the creation of open tube ends and inducing defects in tube walls. This improves dispersibility and load capacity but reduces length and conductivity. Consequently, a trade-off exists between maintaining the intrinsic properties and the degree of functionalization of MWCNTs. In this work, MWCNTs were modified based on the operational requirements of the MEA from the viewpoint of interlayer interactions, including the search for the optimal degree of oxidation, N-doping, and micro-arrangement. MWCNT were functionalized by oxidizing, N-doping, as well as micro-alignment to achieve lower contact resistance between CL and proton exchange membrane (PEM), better hydrophobicity, and enhanced performance. Furthermore, this work expects to construct a more continuously distributed three-phase boundary by aligning MWCNT to form a locally ordered structure, which is essential for the efficient utilization of Pt active sites. Different from other chemical oxidation schemes that used HNO3:H2SO4 (1:3) mixed acid to strongly oxidize MWCNT, this scheme adopted pure HNO3 to partially oxidize MWCNT at a lower reflux temperature (80 ℃) and a shorter treatment time (0 to 10 h) to preserve the morphology and intrinsic conductivity of MWCNT. The maximum power density of 979.81 mw cm-2 was achieved by Pt loading on 6h MWCNT oxidation time (Pt-MWCNT6h). This represented a 59.53% improvement over the commercial Pt/C catalyst of 614.17 (mw cm-2). In addition, due to the stronger electrical conductivity, the charge transfer resistance of Pt-MWCNT6h in the electrochemical impedance spectroscopy (EIS) test was 0.09 Ohm cm-2, which was 48.86% lower than that of Pt/C. This study will discuss the developed catalysts and their efficacy in a working fuel cell system. This research will validate the impact of low-functionalization modification of MWCNTs on the performance of PEMFC, which simplifies the preparation challenges of CL and contributing for the widespread commercial application of PEMFCs on a larger scale. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=carbon%20nanotubes" title="carbon nanotubes">carbon nanotubes</a>, <a href="https://publications.waset.org/abstracts/search?q=electrocatalyst" title=" electrocatalyst"> electrocatalyst</a>, <a href="https://publications.waset.org/abstracts/search?q=membrane%20electrode%20assembly" title=" membrane electrode assembly"> membrane electrode assembly</a>, <a href="https://publications.waset.org/abstracts/search?q=proton%20exchange%20membrane%20fuel%20cell" title=" proton exchange membrane fuel cell"> proton exchange membrane fuel cell</a> </p> <a href="https://publications.waset.org/abstracts/177645/carbon-nanotube-based-catalyst-modification-to-improve-proton-exchange-membrane-fuel-cell-interlayer-interactions" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/177645.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">71</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">6964</span> Electrochemical Performance of Carbon Nanotube Based Supercapacitor </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Jafar%20Khan%20Kasi">Jafar Khan Kasi</a>, <a href="https://publications.waset.org/abstracts/search?q=Ajab%20Khan%20Kasi"> Ajab Khan Kasi</a>, <a href="https://publications.waset.org/abstracts/search?q=Muzamil%20Bokhari"> Muzamil Bokhari </a> </p> <p class="card-text"><strong>Abstract:</strong></p> Carbon nanotube is one of the most attractive materials for the potential applications of nanotechnology due to its excellent mechanical, thermal, electrical and optical properties. In this paper we report a supercapacitor made of nickel foil electrodes, coated with multiwall carbon nanotubes (MWCNTs) thin film using electrophoretic deposition (EPD) method. Chemical vapor deposition method was used for the growth of MWCNTs and ethanol was used as a hydrocarbon source. High graphitic multiwall carbon nanotube was found at 750 C analyzing by Raman spectroscopy. We observed the electrochemical performance of supercapacitor by cyclic voltammetry. The electrodes of supercapacitor fabricated from MWCNTs exhibit considerably small equivalent series resistance (ESR), and a high specific power density. Electrophoretic deposition is an easy method in fabricating MWCNT electrodes for high performance supercapacitor. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=carbon%20nanotube" title="carbon nanotube">carbon nanotube</a>, <a href="https://publications.waset.org/abstracts/search?q=chemical%20vapor%20deposition" title=" chemical vapor deposition"> chemical vapor deposition</a>, <a href="https://publications.waset.org/abstracts/search?q=catalyst" title=" catalyst"> catalyst</a>, <a href="https://publications.waset.org/abstracts/search?q=charge" title=" charge"> charge</a>, <a href="https://publications.waset.org/abstracts/search?q=cyclic%20voltammetry" title=" cyclic voltammetry "> cyclic voltammetry </a> </p> <a href="https://publications.waset.org/abstracts/20355/electrochemical-performance-of-carbon-nanotube-based-supercapacitor" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/20355.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">563</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">6963</span> Preparation of Catalyst-Doped TiO2 Nanotubes by Single Step Anodization and Potential Shock </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Hyeonseok%20Yoo">Hyeonseok Yoo</a>, <a href="https://publications.waset.org/abstracts/search?q=Kiseok%20Oh"> Kiseok Oh</a>, <a href="https://publications.waset.org/abstracts/search?q=Jinsub%20Choi"> Jinsub Choi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Titanium oxide nanotubes have attracted great attention because of its photocatalytic activity and large surface area. For enhancing electrochemical properties, catalysts should be doped into the structure because titanium oxide nanotubes themselves have low electroconductivity and catalytic activity. It has been reported that Ru and Ir doped titanium oxide electrodes exhibit high efficiency and low overpotential in the oxygen evolution reaction (OER) for water splitting. In general, titanium oxide nanotubes with high aspect ratio cannot be easily doped by conventional complex methods. Herein, two types of facile routes, namely single step anodization and potential shock, for Ru doping into high aspect ratio titanium oxide nanotubes are introduced in detail. When single step anodization was carried out, stability of electrodes were increased. However, onset potential was shifted to anodic direction. On the other hand, when high potential shock voltage was applied, a large amount of ruthenium/ruthenium oxides were doped into titanium oxide nanotubes and thick barrier oxide layers were formed simultaneously. Regardless of doping routes, ruthenium/ ruthenium oxides were homogeneously doped into titanium oxide nanotubes. In spite of doping routes, doping in aqueous solution generally led to incorporate high amount of Ru in titanium oxide nanotubes, compared to that in non-aqueous solution. The amounts of doped catalyst were analyzed by X-ray photoelectron spectroscopy (XPS). The optimum condition for water splitting was investigated in terms of the amount of doped Ru and thickness of barrier oxide layer. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=doping" title="doping">doping</a>, <a href="https://publications.waset.org/abstracts/search?q=potential%20shock" title=" potential shock"> potential shock</a>, <a href="https://publications.waset.org/abstracts/search?q=single%20step%20anodization" title=" single step anodization"> single step anodization</a>, <a href="https://publications.waset.org/abstracts/search?q=titanium%20oxide%20nanotubes" title=" titanium oxide nanotubes"> titanium oxide nanotubes</a> </p> <a href="https://publications.waset.org/abstracts/36644/preparation-of-catalyst-doped-tio2-nanotubes-by-single-step-anodization-and-potential-shock" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/36644.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">460</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">6962</span> Development of a Myocardial Patch with 3D Hydrogel Electrical Stimulation System</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Yung-Gi%20Chen">Yung-Gi Chen</a>, <a href="https://publications.waset.org/abstracts/search?q=Pei-Leun%20Kang"> Pei-Leun Kang</a>, <a href="https://publications.waset.org/abstracts/search?q=Yu-Hsin%20Lin"> Yu-Hsin Lin</a>, <a href="https://publications.waset.org/abstracts/search?q=Shwu-Jen%20Chang"> Shwu-Jen Chang</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Myocardial tissue has limited self-repair ability due to its loss of differentiation characteristic for most mature cardiomyocytes. Therefore, the effective use of stem cell technology in regenerative medicine is an important development to alleviate the current difficulties in cardiac disease treatment. The main purpose of this project was to develop a 3-D hydrogel electrical stimulating system for promoting the differentiation of stem cells into myocardial cells, and the patch will be used to repair damaged myocardial tissue. This project was focused on the preparation of the electrical stimulation system with carbon/CaCl₂ electrodes covered with carbon nanotube-hydrogel. In this study, we utilized screen imprinting techniques and used Poly(lactic-co-glycolic acid)(PLGA) membranes as printing substrates to fabricate a carbon/CaCl₂ interdigitated electrode that covered with alginate/carbon nanotube hydrogels. The single-walled carbon nanotube was added in the hydrogel to enhance the mechanical strength and conductivity of hydrogel. In this study, we used PLGA (85:15) as electrode preparing substrate. The CaCl₂/ EtOH solution (80% w/v) was mixed into carbon paste to prepare various concentration calcium-containing carbon paste (2.5%, 5%, 7.5%, 10% v/v). Different concentrations of alginate (1%, 1.5%, 2% v/v) and SWCNT(Diameter < 2nm, length between 5-15μm) (1, 1.5, 3 mg/ml) are gently immobilized on the electrode by cross-linking with calcium chloride. The three-dimensional hydrogel electrode was tested for its redox efficiency by cyclic voltammetry to determine the optimal parameters for the hydrogel electrode preparation. From the result of the final electrodes, it indicated that the electrode was not easy to maintain the pattern of the interdigitated electrode when the concentration of calcium of chloride was more than 10%. According to the gel rate test and cyclic voltammetry experiment results showed the SWCNT could increase the electron conduction of hydrogel electrodes significantly. So far the 3D electrode system has been completed, 2% alginate mixed with 3mg SWCNT is the optimal condition to construct the most complete structure for the hydrogel preparation. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=myocardial%20tissue%20engineering" title="myocardial tissue engineering">myocardial tissue engineering</a>, <a href="https://publications.waset.org/abstracts/search?q=screen%20printing%20technology" title=" screen printing technology"> screen printing technology</a>, <a href="https://publications.waset.org/abstracts/search?q=poly%20%28lactic-co-glycolic%20acid%29" title=" poly (lactic-co-glycolic acid)"> poly (lactic-co-glycolic acid)</a>, <a href="https://publications.waset.org/abstracts/search?q=alginate" title=" alginate"> alginate</a>, <a href="https://publications.waset.org/abstracts/search?q=single%20walled%20carbon%20nanotube" title=" single walled carbon nanotube"> single walled carbon nanotube</a> </p> <a href="https://publications.waset.org/abstracts/98452/development-of-a-myocardial-patch-with-3d-hydrogel-electrical-stimulation-system" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/98452.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">113</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">6961</span> A Brief Exploration on the Green Urban Design for Carbon Neutrality</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Gaoyuan%20Wang">Gaoyuan Wang</a>, <a href="https://publications.waset.org/abstracts/search?q=Tian%20Chen">Tian Chen</a> </p> <p class="card-text"><strong>Abstract:</strong></p> China’s emission peak and carbon neutrality strategies lead to the transformation of development patterns and call for new green urban design thinking. This paper begins by revealing the evolution of green urban design thinking during the periods of carbon enlightenment, carbon dependency, and carbon decoupling from the perspective of the energy transition. Combined with the current energy situation, national strengths, and technological trends, the emergence of green urban design towards carbon neutrality becomes inevitable. Based on the preliminary analysis of its connotation, the characteristics of the new type of green urban design are generalized as low-carbon orientation, carbon-related objects, carbon-reduction means, and carbon-control patterns. Its theory is briefly clarified in terms of the human-earth synergism, quality-energy interconnection, and form-flow interpromotion. Then, its mechanism is analyzed combined with the core tasks of carbon neutrality, and the scope of design issues is defined, including carbon flow mapping, carbon source regulation, carbon sink construction, and carbon emission management. Finally, a multi-scale spatial response system is proposed across the region, city, cluster, and neighborhood level. The discussion aims to provide support for the innovation of green urban design theories and methods in the context of peak neutrality. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=carbon%20neutrality" title="carbon neutrality">carbon neutrality</a>, <a href="https://publications.waset.org/abstracts/search?q=green%20urban%20design" title=" green urban design"> green urban design</a>, <a href="https://publications.waset.org/abstracts/search?q=energy%20transition" title=" energy transition"> energy transition</a>, <a href="https://publications.waset.org/abstracts/search?q=theoretical%20exploration" title=" theoretical exploration"> theoretical exploration</a> </p> <a href="https://publications.waset.org/abstracts/140514/a-brief-exploration-on-the-green-urban-design-for-carbon-neutrality" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/140514.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">6960</span> Influences of Thermal Treatments on Dielectric Behaviors of Carbon Nanotubes-BaTiO₃ Hybrids Reinforced Polyvinylidene Fluoride Composites</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Benhui%20Fan">Benhui Fan</a>, <a href="https://publications.waset.org/abstracts/search?q=Fahmi%20Bedoui"> Fahmi Bedoui</a>, <a href="https://publications.waset.org/abstracts/search?q=Jinbo%20Bai"> Jinbo Bai</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Incorporated carbon nanotube-BaTiO₃ hybrids (H-CNT-BT) with core-shell structure, a better dispersion of CNTs can be achieved in a semi-crystalline polymeric matrix, polyvinylidene fluoride (PVDF). Carried by BT particles, CNTs are easy to mutually connect which helps to obtain an extremely low percolation threshold (fc). After thermal treatments, the dielectric constants (ε’) of samples further increase which depends on the conditions of thermal treatments such as annealing temperatures, annealing durations and cooling ways. Thus, in order to study more comprehensively about the influence of thermal treatments on composite’s dielectric behaviors, in situ synchrotron X-ray is used to detect re-crystalline behavior of PVDF. Results of wide-angle X-ray diffraction (WAXD) and small-angle X-ray scattering (SAXS) show that after the thermal treatment, the content of β polymorph (the polymorph with the highest ε’ among all the polymorphs of PVDF’s crystalline structure) has increased nearly double times at the interfacial region of CNT-PVDF, and the thickness of amorphous layers (La) in PVDF’s long periods (Lp) has shrunk around 10 Å. The evolution of CNT’s network possibly occurs in the procedure of La shrinkage, where the strong interfacial polarization may be aroused and increases ε’ at low frequency. Moreover, an increase in the thickness of crystalline lamella may also arouse more orientational polarization and improve ε’ at high frequency. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=dielectric%20properties" title="dielectric properties">dielectric properties</a>, <a href="https://publications.waset.org/abstracts/search?q=thermal%20treatments" title=" thermal treatments"> thermal treatments</a>, <a href="https://publications.waset.org/abstracts/search?q=carbon%20nanotubes" title=" carbon nanotubes"> carbon nanotubes</a>, <a href="https://publications.waset.org/abstracts/search?q=crystalline%20structure" title=" crystalline structure"> crystalline structure</a> </p> <a href="https://publications.waset.org/abstracts/79466/influences-of-thermal-treatments-on-dielectric-behaviors-of-carbon-nanotubes-batio3-hybrids-reinforced-polyvinylidene-fluoride-composites" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/79466.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">6959</span> Development of a Highly Flexible, Sensitive and Stretchable Polymer Nanocomposite for Strain Sensing </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Shaghayegh%20Shajari">Shaghayegh Shajari</a>, <a href="https://publications.waset.org/abstracts/search?q=Mehdi%20Mahmoodi"> Mehdi Mahmoodi</a>, <a href="https://publications.waset.org/abstracts/search?q=Mahmood%20Rajabian"> Mahmood Rajabian</a>, <a href="https://publications.waset.org/abstracts/search?q=Uttandaraman%20Sundararaj"> Uttandaraman Sundararaj</a>, <a href="https://publications.waset.org/abstracts/search?q=Les%20J.%20Sudak"> Les J. Sudak </a> </p> <p class="card-text"><strong>Abstract:</strong></p> Although several strain sensors based on carbon nanotubes (CNTs) have been reported, the stretchability and sensitivity of these sensors have remained as a challenge. Highly stretchable and sensitive strain sensors are in great demand for human motion monitoring and human-machine interface. This paper reports the fabrication and characterization of a new type of strain sensors based on a stretchable fluoropolymer / CNT nanocomposite system made via melt-mixing technique. Electrical and mechanical characterizations were obtained. The results showed that this nanocomposite sensor has high stretchability up to 280% of strain at an optimum level of filler concentration. The piezoresistive properties and the strain sensing mechanism of the strain sensor were investigated using Electrochemical Impedance Spectroscopy (EIS). High sensitivity was obtained (gauge factor as large as 12000 under 120% applied strain) in particular at the concentrations above the percolation threshold. Due to the tunneling effect, a non- linear piezoresistivity was observed at high concentrations of CNT loading. The nanocomposites with good conductivity and lightweight could be a promising candidate for strain sensing applications. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=carbon%20nanotubes" title="carbon nanotubes">carbon nanotubes</a>, <a href="https://publications.waset.org/abstracts/search?q=fluoropolymer" title=" fluoropolymer"> fluoropolymer</a>, <a href="https://publications.waset.org/abstracts/search?q=piezoresistive" title=" piezoresistive"> piezoresistive</a>, <a href="https://publications.waset.org/abstracts/search?q=strain%20sensor" title=" strain sensor"> strain sensor</a> </p> <a href="https://publications.waset.org/abstracts/87421/development-of-a-highly-flexible-sensitive-and-stretchable-polymer-nanocomposite-for-strain-sensing" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/87421.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">296</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">6958</span> The Fabrication and Characterization of Hierarchical Carbon Nanotube/Carbon Fiber/High-Density Polyethylene Composites via Twin-Screw Extrusion</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Chao%20Hu">Chao Hu</a>, <a href="https://publications.waset.org/abstracts/search?q=Xinwen%20Liao"> Xinwen Liao</a>, <a href="https://publications.waset.org/abstracts/search?q=Qing-Hua%20Qin"> Qing-Hua Qin</a>, <a href="https://publications.waset.org/abstracts/search?q=Gang%20Wang"> Gang Wang</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The hierarchical carbon nanotube (CNT)/carbon fiber (CF)/high density polyethylene (HDPE) was fabricated via compound extrusion and injection molding, in which to author’s best knowledge CNT was employed as a nano-coatings on the surface of CF for the first time by spray coating technique. The CNT coatings relative to CF was set at 1 wt% and the CF content relative to the composites varied from 0 to 25 wt% to study the influence of CNT coatings and CF contents on the mechanical, thermal and morphological performance of this hierarchical composites. The results showed that with the rise of CF contents, the mechanical properties, including the tensile properties, flexural properties, and hardness of CNT/CF/HDPE composites, were effectively improved. Furthermore, the CNT-coated composites showed overall higher mechanical performance than the uncoated counterparts. It can be ascribed to the enhancement of interfacial bonding between the CF and HDPE via the incorporation of CNT, which was demonstrated by the scanning electron microscopy observation. Meanwhile, the differential scanning calorimetry data indicated that by the introduction of CNT and CF, the crystallization temperature and crystallinity of HDPE were affected while the melting temperature did not have an obvious alteration. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=carbon%20fibers" title="carbon fibers">carbon fibers</a>, <a href="https://publications.waset.org/abstracts/search?q=carbon%20nanotubes" title=" carbon nanotubes"> carbon nanotubes</a>, <a href="https://publications.waset.org/abstracts/search?q=extrusion" title=" extrusion"> extrusion</a>, <a href="https://publications.waset.org/abstracts/search?q=high%20density%20polyethylene" title=" high density polyethylene "> high density polyethylene </a> </p> <a href="https://publications.waset.org/abstracts/110161/the-fabrication-and-characterization-of-hierarchical-carbon-nanotubecarbon-fiberhigh-density-polyethylene-composites-via-twin-screw-extrusion" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/110161.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">138</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">6957</span> Modification of Carbon-Based Gas Sensors for Boosting Selectivity</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=D.%20Zhao">D. Zhao</a>, <a href="https://publications.waset.org/abstracts/search?q=Y.%20Wang"> Y. Wang</a>, <a href="https://publications.waset.org/abstracts/search?q=G.%20Chen"> G. Chen</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Gas sensors that utilize carbonaceous materials as sensing media offer numerous advantages, making them the preferred choice for constructing chemical sensors over those using other sensing materials. Carbonaceous materials, particularly nano-sized ones like carbon nanotubes (CNTs), provide these sensors with high sensitivity. Additionally, carbon-based sensors possess other advantageous properties that enhance their performance, including high stability, low power consumption for operation, and cost-effectiveness in their construction. These properties make carbon-based sensors ideal for a wide range of applications, especially in miniaturized devices created through MEMS or NEMS technologies. To capitalize on these properties, a group of chemoresistance-type carbon-based gas sensors was developed and tested against various volatile organic compounds (VOCs) and volatile inorganic compounds (VICs). The results demonstrated exceptional sensitivity to both VOCs and VICs, along with the sensor’s long-term stability. However, this broad sensitivity also led to poor selectivity towards specific gases. This project aims at addressing the selectivity issue by modifying the carbon-based sensing materials and enhancing the sensor's specificity to individual gas. Multiple groups of sensors were manufactured and modified using proprietary techniques. To assess their performance, we conducted experiments on representative sensors from each group to detect a range of VOCs and VICs. The VOCs tested included acetone, dimethyl ether, ethanol, formaldehyde, methane, and propane. The VICs comprised carbon monoxide (CO), carbon dioxide (CO2), hydrogen (H2), nitric oxide (NO), and nitrogen dioxide (NO2). The concentrations of the sample gases were all set at 50 parts per million (ppm). Nitrogen (N2) was used as the carrier gas throughout the experiments. The results of the gas sensing experiments are as follows. In Group 1, the sensors exhibited selectivity toward CO2, acetone, NO, and NO2, with NO2 showing the highest response. Group 2 primarily responded to NO2. Group 3 displayed responses to nitrogen oxides, i.e., both NO and NO2, with NO2 slightly surpassing NO in sensitivity. Group 4 demonstrated the highest sensitivity among all the groups toward NO and NO2, with NO2 being more sensitive than NO. In conclusion, by incorporating several modifications using carbon nanotubes (CNTs), sensors can be designed to respond well to NOx gases with great selectivity and without interference from other gases. Because the response levels to NO and NO2 from each group are different, the individual concentration of NO and NO2 can be deduced. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=gas%20sensors" title="gas sensors">gas sensors</a>, <a href="https://publications.waset.org/abstracts/search?q=carbon" title=" carbon"> carbon</a>, <a href="https://publications.waset.org/abstracts/search?q=CNT" title=" CNT"> CNT</a>, <a href="https://publications.waset.org/abstracts/search?q=MEMS%2FNEMS" title=" MEMS/NEMS"> MEMS/NEMS</a>, <a href="https://publications.waset.org/abstracts/search?q=VOC" title=" VOC"> VOC</a>, <a href="https://publications.waset.org/abstracts/search?q=VIC" title=" VIC"> VIC</a>, <a href="https://publications.waset.org/abstracts/search?q=high%20selectivity" title=" high selectivity"> high selectivity</a>, <a href="https://publications.waset.org/abstracts/search?q=modification%20of%20sensing%20materials" title=" modification of sensing materials"> modification of sensing materials</a> </p> <a href="https://publications.waset.org/abstracts/167468/modification-of-carbon-based-gas-sensors-for-boosting-selectivity" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/167468.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">128</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">6956</span> Multi-Objective Optimization in Carbon Abatement Technology Cycles (CAT) and Related Areas: Survey, Developments and Prospects</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Hameed%20Rukayat%20Opeyemi">Hameed Rukayat Opeyemi</a>, <a href="https://publications.waset.org/abstracts/search?q=Pericles%20Pilidis"> Pericles Pilidis</a>, <a href="https://publications.waset.org/abstracts/search?q=Pagone%20Emanuele"> Pagone Emanuele</a> </p> <p class="card-text"><strong>Abstract:</strong></p> An infinitesimal increase in performance can have immense reduction in operating and capital expenses in a power generation system. Therefore, constant studies are being carried out to improve both conventional and novel power cycles. Globally, power producers are constantly researching on ways to minimize emission and to collectively downsize the total cost rate of power plants. A substantial spurt of developmental technologies of low carbon cycles have been suggested and studied, however they all have their limitations and financial implication. In the area of carbon abatement in power plants, three major objectives conflict: The cost rate of the plant, Power output and Environmental impact. Since, an increase in one of this parameter directly affects the other. This poses a multi-objective problem. It is paramount to be able to discern the point where improving one objective affects the other. Hence, the need for a Pareto-based optimization algorithm. Pareto-based optimization algorithm helps to find those points where improving one objective influences another objective negatively and stops there. The application of Pareto-based optimization algorithm helps the user/operator/designer make an informed decision. This paper sheds more light on areas that multi-objective optimization has been applied in carbon abatement technologies in the last five years, developments and prospects. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=gas%20turbine" title="gas turbine">gas turbine</a>, <a href="https://publications.waset.org/abstracts/search?q=low%20carbon%20technology" title=" low carbon technology"> low carbon technology</a>, <a href="https://publications.waset.org/abstracts/search?q=pareto%20optimal" title=" pareto optimal"> pareto optimal</a>, <a href="https://publications.waset.org/abstracts/search?q=multi-objective%20optimization" title=" multi-objective optimization"> multi-objective optimization</a> </p> <a href="https://publications.waset.org/abstracts/27738/multi-objective-optimization-in-carbon-abatement-technology-cycles-cat-and-related-areas-survey-developments-and-prospects" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/27738.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">791</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">6955</span> Performance Analysis of Carbon Nanotube for VLSI Interconnects and Their Comparison with Copper Interconnects</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Gagnesh%20Kumar">Gagnesh Kumar</a>, <a href="https://publications.waset.org/abstracts/search?q=Prashant%20Gupta"> Prashant Gupta</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper investigates the performance of the bundle of single wall carbon nanotubes (SWCNT) for low-power and high-speed interconnects for future VLSI applications. The power dissipation, delay and power delay product (PDP) of SWCNT bundle interconnects are examined and compared with that of the Cu interconnects at 22 nm technology node for both intermediate and global interconnects. The results show that SWCNT bundle consume less power and also faster than Cu for intermediate and global interconnects. It is concluded that the metallic SWCNT has been regarded as a viable candidate for intermediate and global interconnects in future technologies. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=carbon%20nanotube" title="carbon nanotube">carbon nanotube</a>, <a href="https://publications.waset.org/abstracts/search?q=SWCNT" title=" SWCNT"> SWCNT</a>, <a href="https://publications.waset.org/abstracts/search?q=low%20power" title=" low power"> low power</a>, <a href="https://publications.waset.org/abstracts/search?q=delay" title=" delay"> delay</a>, <a href="https://publications.waset.org/abstracts/search?q=power%20delay%20product" title=" power delay product"> power delay product</a>, <a href="https://publications.waset.org/abstracts/search?q=global%20and%20intermediate%20interconnects" title=" global and intermediate interconnects"> global and intermediate interconnects</a> </p> <a href="https://publications.waset.org/abstracts/9055/performance-analysis-of-carbon-nanotube-for-vlsi-interconnects-and-their-comparison-with-copper-interconnects" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/9055.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">321</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">6954</span> Effect of N2-cold Plasma Treatment of Carbon Supports on the Activity of Pt3Pd3Sn2/C Towards the Dimethyl Ether Oxidation</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Medhanie%20Gebremedhin%20Gebru">Medhanie Gebremedhin Gebru</a>, <a href="https://publications.waset.org/abstracts/search?q=Alex%20Schechter"> Alex Schechter</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Dimethyl ether (DME) possesses several advantages over other small organic molecules such as methanol, ethanol, and ammonia in terms of providing higher energy density, being less toxic, and having lower Nafion membrane crossover. However, the absence of an active and stable catalyst has been the bottleneck that hindered the commercialization of direct DME fuel cells. A Vulcan XC72 carbon-supported ternary metal catalyst, Pt₃Pd₃Sn₂/C is reported to have yielded the highest specific power density (90 mW mg-¹PGM) as compared to other catalysts tested fordirect DME fuel cell (DDMEFC). However, the micropores and sulfur groups present in Vulcan XC72 hinder the fuel utilization by causing Pt agglomeration and sulfur poisoning. Vulcan XC72 having a high carbon sp³ hybridization content, is also prone to corrosion. Therefore, carbon supports such as multi-walled carbon nanotube (MWCNT), black pearl 2000 (BP2000), and their cold N2 plasma-treated counterpartswere tested to further enhance the activity of the catalyst, and the outputs with these carbons were compared with the originally used support. Detailed characterization of the pristine and carbon supports was conducted. Electrochemical measurements in three-electrode cells and laboratory prototype fuel cells were conducted.Pt₃Pd₃Sn₂/BP2000 exhibited excellent performance in terms of electrochemical active surface area (ECSA), peak current density (jp), and DME oxidation charge (Qoxi). The effect of the plasma activation on the activity improvement was observed only in the case of MWCNT while having little or no effect on the other carbons. A Pt₃Pd₃Sn₂ supported on the optimized mixture of carbons containing 75% plasma-activated MWCNT and 25% BP2000 (Pt₃Pd₃Sn₂/75M25B) provided the highest reported power density of 117 mW mg-1PGM using an anode loading of1.55 mgPGMcm⁻². <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=DME" title="DME">DME</a>, <a href="https://publications.waset.org/abstracts/search?q=DDMEFC" title=" DDMEFC"> DDMEFC</a>, <a href="https://publications.waset.org/abstracts/search?q=ternary%20metal%20catalyst" title=" ternary metal catalyst"> ternary metal catalyst</a>, <a href="https://publications.waset.org/abstracts/search?q=carbon%20support" title=" carbon support"> carbon support</a>, <a href="https://publications.waset.org/abstracts/search?q=plasma%20activation" title=" plasma activation"> plasma activation</a> </p> <a href="https://publications.waset.org/abstracts/144005/effect-of-n2-cold-plasma-treatment-of-carbon-supports-on-the-activity-of-pt3pd3sn2c-towards-the-dimethyl-ether-oxidation" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/144005.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">145</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">6953</span> Flexural Properties of Halloysite Nanotubes-Polyester Nanocomposites Exposed to Aggressive Environment </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mohd%20Shahneel%20Saharudin">Mohd Shahneel Saharudin</a>, <a href="https://publications.waset.org/abstracts/search?q=Jiacheng%20Wei"> Jiacheng Wei</a>, <a href="https://publications.waset.org/abstracts/search?q=Islam%20Shyha"> Islam Shyha</a>, <a href="https://publications.waset.org/abstracts/search?q=Fawad%20Inam"> Fawad Inam</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This study aimed to investigate the effect of aggressive environment on the flexural properties of halloysite nanotubes-polyester nanocomposites. Results showed that the addition of halloysite nanotubes into polyester matrix was found to improve flexural properties of the nanocomposites in dry condition and after water-methanol exposure. Significant increase in surface roughness was also observed and measured by Alicona Infinite Focus optical microscope. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=halloysite%20nanotube" title="halloysite nanotube">halloysite nanotube</a>, <a href="https://publications.waset.org/abstracts/search?q=composites" title=" composites"> composites</a>, <a href="https://publications.waset.org/abstracts/search?q=flexural%20properties" title=" flexural properties"> flexural properties</a>, <a href="https://publications.waset.org/abstracts/search?q=surface%20roughness" title=" surface roughness"> surface roughness</a> </p> <a href="https://publications.waset.org/abstracts/68270/flexural-properties-of-halloysite-nanotubes-polyester-nanocomposites-exposed-to-aggressive-environment" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/68270.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">279</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> Elaboration of Titania Nanotubes on Ti₆Al₄V Substrate by Electrochemical Anodization for Dental Application</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Abdelghani%20Boucheham">Abdelghani Boucheham</a>, <a href="https://publications.waset.org/abstracts/search?q=Ahcene%20Karaali"> Ahcene Karaali</a>, <a href="https://publications.waset.org/abstracts/search?q=Amar%20Manseri"> Amar Manseri</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Nanostructured Titania layers formed on the surface of titanium and titanium alloys by anodic oxidation play an important role in the enhancement of their biocompatibility and osseointegration in the human body. In the current work, highly ordered titania nanotube array films were elaborated on Ti₆Al₄V medical grade alloys in organic electrolyte containing ethylene glycol, 0.2 wt. % NH₄F and 4 vol. % H₂O at an applied potential of 60 V for different durations. The diameters, lengths and wall thicknesses of the obtained nanotubes were characterized by scanning electronic microscopy (SEM). <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=anodization" title="anodization">anodization</a>, <a href="https://publications.waset.org/abstracts/search?q=dental%20implants" title=" dental implants"> dental implants</a>, <a href="https://publications.waset.org/abstracts/search?q=titania%20nanotubes" title=" titania nanotubes"> titania nanotubes</a>, <a href="https://publications.waset.org/abstracts/search?q=titanium%20alloys" title=" titanium alloys"> titanium alloys</a>, <a href="https://publications.waset.org/abstracts/search?q=SEM" title=" SEM"> SEM</a> </p> <a href="https://publications.waset.org/abstracts/53217/elaboration-of-titania-nanotubes-on-ti6al4v-substrate-by-electrochemical-anodization-for-dental-application" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/53217.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">6951</span> Biofouling Control during the Wastewater Treatment in Self-Support Carbon Nanotubes Membrane: Role of Low Voltage Electric Potential</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Chidambaram%20Thamaraiselvan">Chidambaram Thamaraiselvan</a>, <a href="https://publications.waset.org/abstracts/search?q=Carlos%20Dosoretz"> Carlos Dosoretz</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This work will explore the influence of low voltage electric field, both alternating (AC) and direct (DC) currents, on biofouling control to highly electrically conductive self-supporting carbon nanotubes (CNT) membranes at conditions which encourage bacterial growth. A mutant strain of Pseudomonas putida S12 was used a model bacterium. The antibiofouling studies were performed with flow-through mode connecting an electric circuit in resistive mode. Major emphasis was placed on AC due to its ability of repulsing and inactivating bacteria. The observations indicate that an AC potential >1500 mV, 1 kHz frequency, 100 Ω external resistance on ground side and pulse wave above the offset (+0.45) almost completely prevented attachment of bacteria (>98.5%) and bacterial inactivation (95.3±2.5%). Findings suggest that at the conditions applied, direct electron transfer might be dominant in a decrease of cell viability. AC resulted more effective than DC, both in terms of biofouling reduction compared to cathodic DC and in terms of cell inactivation compared to anodic DC. This electrically polarized CNT membranes offer a viable antibiofouling strategy to hinder biofouling and simplify membrane care during filtration. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=bacterial%20attachment" title="bacterial attachment">bacterial attachment</a>, <a href="https://publications.waset.org/abstracts/search?q=biofouling%20control" title=" biofouling control"> biofouling control</a>, <a href="https://publications.waset.org/abstracts/search?q=low%20electric%20potential" title=" low electric potential"> low electric potential</a>, <a href="https://publications.waset.org/abstracts/search?q=water%20treatment" title=" water treatment"> water treatment</a> </p> <a href="https://publications.waset.org/abstracts/68570/biofouling-control-during-the-wastewater-treatment-in-self-support-carbon-nanotubes-membrane-role-of-low-voltage-electric-potential" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/68570.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">270</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> High-Yield Synthesis of Nanohybrid Shish-Kebab of Polyethylene on Carbon NanoFillers</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Dilip%20Depan">Dilip Depan</a>, <a href="https://publications.waset.org/abstracts/search?q=Austin%20Simoneaux"> Austin Simoneaux</a>, <a href="https://publications.waset.org/abstracts/search?q=William%20Chirdon"> William Chirdon</a>, <a href="https://publications.waset.org/abstracts/search?q=Ahmed%20Khattab"> Ahmed Khattab</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this study, we present a novel approach to synthesize polymer nanocomposites with nanohybrid shish-kebab architecture (NHSK). For this low-density and high density polyethylene (PE) was crystallized on various carbon nano-fillers using a novel and convenient method to prepare high-yield NHSK. Polymer crystals grew epitaxially on carbon nano-fillers using a solution crystallization method. The mixture of polymer and carbon fillers in xylene was flocculated and precipitated in ethanol to improve the product yield. Carbon nanofillers of varying diameter were also used as a nucleating template for polymer crystallization. The morphology of the prepared nanocomposites was characterized scanning electron microscopy (SEM), while differential scanning calorimetry (DSC) was used to quantify the amount of crystalline polymer. Interestingly, whatever the diameter of the carbon nanofiller is, the lamellae of PE is always perpendicular to the long axis of nanofiller. Surface area analysis was performed using BET. Our results indicated that carbon nanofillers of varying diameter can be used to effectively nucleate the crystallization of polymer. The effect of molecular weight and concentration of the polymer was discussed on the basis of chain mobility and crystallization capability of the polymer matrix. Our work shows a facile, rapid, yet high-yield production method to form polymer nanocomposites to reveal application potential of NHSK architecture. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=carbon%20nanotubes" title="carbon nanotubes">carbon nanotubes</a>, <a href="https://publications.waset.org/abstracts/search?q=polyethylene" title=" polyethylene"> polyethylene</a>, <a href="https://publications.waset.org/abstracts/search?q=nanohybrid%20shish-kebab" title=" nanohybrid shish-kebab"> nanohybrid shish-kebab</a>, <a href="https://publications.waset.org/abstracts/search?q=crystallization" title=" crystallization"> crystallization</a>, <a href="https://publications.waset.org/abstracts/search?q=morphology" title=" morphology"> morphology</a> </p> <a href="https://publications.waset.org/abstracts/44039/high-yield-synthesis-of-nanohybrid-shish-kebab-of-polyethylene-on-carbon-nanofillers" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/44039.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">329</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> Dielectric Properties of MWCNT-Muscovite/Epoxy Hybrid Composites</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Nur%20Suraya%20Anis%20Ahmad%20Bakhtiar">Nur Suraya Anis Ahmad Bakhtiar</a>, <a href="https://publications.waset.org/abstracts/search?q=Hazizan%20Md%20Akil"> Hazizan Md Akil</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In the present work, the dielectric properties of Epoxy/MWCNTs-muscovite HYBRID and MIXED composites based on ratio 30:70 were studies. The multi-wall carbon nanotubes (MWCNTs) were prepared by two method; (a) muscovite-MWCNTs hybrids were synthesized by chemical vapor deposition (CVD) and (b) physically mixing of muscovite with MWCNTs. The effect of different preparations of the composites and filler loading was evaluated. It is revealed that the dielectric constants of HYBRID epoxy composites are slightly higher compared to MIXED epoxy composites. It is also indicated that the dielectric constant increased by increases the MWCNTs filler loading. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=muscovite" title="muscovite">muscovite</a>, <a href="https://publications.waset.org/abstracts/search?q=epoxy" title=" epoxy"> epoxy</a>, <a href="https://publications.waset.org/abstracts/search?q=dielectric%20properties" title=" dielectric properties"> dielectric properties</a>, <a href="https://publications.waset.org/abstracts/search?q=hybrid%20composite" title=" hybrid composite"> hybrid composite</a> </p> <a href="https://publications.waset.org/abstracts/20252/dielectric-properties-of-mwcnt-muscoviteepoxy-hybrid-composites" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/20252.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">650</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> MnO₂-Carbon Nanotubes Catalyst for Enhanced Oxygen Reduction Reaction in Polymer Electrolyte Membrane Fuel Cell</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Abidullah">Abidullah</a>, <a href="https://publications.waset.org/abstracts/search?q=Basharat%20Hussain"> Basharat Hussain</a>, <a href="https://publications.waset.org/abstracts/search?q=Jong%20Seok%20Kim"> Jong Seok Kim</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Polymer electrolyte membrane fuel cell (PEMFC) is an electrochemical cell, which undergoes an oxygen reduction reaction to produce electrical energy. Platinum (Pt) metal has been used as a catalyst since its inception, but expensiveness is the major obstacle in the commercialization of fuel cells. Herein a non-precious group metal (NPGM) is employed instead of Pt to reduce the cost of PEMFCs. Manganese dioxide impregnated carbon nanotubes (MnO₂-CNTs composite) is a catalyst having excellent electrochemical properties and offers a better alternative to the Platinum-based PEMFC. The catalyst is synthesized by impregnating the transition metal on large surface carbonaceous CNTs by hydrothermal synthesis techniques. To enhance the catalytic activity and increase the volumetric current density, the sample was pyrolyzed at 800ᵒC under a nitrogen atmosphere. During pyrolysis, the nitrogen was doped in the framework of CNTs. Then the material was treated with acid for removing the unreacted metals and adding oxygen functional group to the CNT framework. This process ameliorates the catalytic activity of the manganese-based catalyst. The catalyst has been characterized by scanning electron microscope (SEM), X-ray diffraction (XRD), and the catalyst activity has been examined by rotating disc electrode (RDE) experiment. The catalyst was strong enough to withstand an austere alkaline environment in experimental conditions and had a high electrocatalytic activity for oxygen reduction reaction (ORR). Linear Sweep Voltammetry (LSV) depicts an excellent current density of -4.0 mA/cm² and an overpotential of -0.3V vs. standard calomel electrode (SCE) in 0.1M KOH electrolyte. Rotating disk electrode (RDE) was conducted at 400, 800, 1200, and 1600 rpm. The catalyst exhibited a higher methanol tolerance and long term durability with respect to commercial Pt/C. The results for MnO₂-CNT show that the low-cost catalyst will supplant the expensive Pt/C catalyst in the fuel cell. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=carbon%20nanotubes" title="carbon nanotubes">carbon nanotubes</a>, <a href="https://publications.waset.org/abstracts/search?q=methanol%20fuel%20cell" title=" methanol fuel cell"> methanol fuel cell</a>, <a href="https://publications.waset.org/abstracts/search?q=oxygen%20reduction%20reaction" title=" oxygen reduction reaction"> oxygen reduction reaction</a>, <a href="https://publications.waset.org/abstracts/search?q=MnO%E2%82%82-CNTs" title=" MnO₂-CNTs"> MnO₂-CNTs</a> </p> <a href="https://publications.waset.org/abstracts/130934/mno2-carbon-nanotubes-catalyst-for-enhanced-oxygen-reduction-reaction-in-polymer-electrolyte-membrane-fuel-cell" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/130934.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">125</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> Extracting the Coupled Dynamics in Thin-Walled Beams from Numerical Data Bases</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mohammad%20A.%20Bani-Khaled">Mohammad A. Bani-Khaled</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this work we use the Discrete Proper Orthogonal Decomposition transform to characterize the properties of coupled dynamics in thin-walled beams by exploiting numerical simulations obtained from finite element simulations. The outcomes of the will improve our understanding of the linear and nonlinear coupled behavior of thin-walled beams structures. Thin-walled beams have widespread usage in modern engineering application in both large scale structures (aeronautical structures), as well as in nano-structures (nano-tubes). Therefore, detailed knowledge in regard to the properties of coupled vibrations and buckling in these structures are of great interest in the research community. Due to the geometric complexity in the overall structure and in particular in the cross-sections it is necessary to involve computational mechanics to numerically simulate the dynamics. In using numerical computational techniques, it is not necessary to over simplify a model in order to solve the equations of motions. Computational dynamics methods produce databases of controlled resolution in time and space. These numerical databases contain information on the properties of the coupled dynamics. In order to extract the system dynamic properties and strength of coupling among the various fields of the motion, processing techniques are required. Time- Proper Orthogonal Decomposition transform is a powerful tool for processing databases for the dynamics. It will be used to study the coupled dynamics of thin-walled basic structures. These structures are ideal to form a basis for a systematic study of coupled dynamics in structures of complex geometry. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=coupled%20dynamics" title="coupled dynamics">coupled dynamics</a>, <a href="https://publications.waset.org/abstracts/search?q=geometric%20complexity" title=" geometric complexity"> geometric complexity</a>, <a href="https://publications.waset.org/abstracts/search?q=proper%20orthogonal%20decomposition%20%28POD%29" title=" proper orthogonal decomposition (POD)"> proper orthogonal decomposition (POD)</a>, <a href="https://publications.waset.org/abstracts/search?q=thin%20walled%20beams" title=" thin walled beams"> thin walled beams</a> </p> <a href="https://publications.waset.org/abstracts/22175/extracting-the-coupled-dynamics-in-thin-walled-beams-from-numerical-data-bases" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/22175.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">418</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> Investigation of Polypropylene Composite Films With Carbon Nanotubes and the Role of β Nucleating Agents for the Improvement of Their Water Vapor Permeability</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Glykeria%20A.%20Visvini">Glykeria A. Visvini</a>, <a href="https://publications.waset.org/abstracts/search?q=George%20N.%20Mathioudakis"> George N. Mathioudakis</a>, <a href="https://publications.waset.org/abstracts/search?q=Amaia%20Soto%20Beobide"> Amaia Soto Beobide</a>, <a href="https://publications.waset.org/abstracts/search?q=Aris%20E.%20Giannakas"> Aris E. Giannakas</a>, <a href="https://publications.waset.org/abstracts/search?q=George%20A.%20Voyiatzis"> George A. Voyiatzis</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Polymeric nanocomposites have generated considerable interest in both academic research and industry because their properties can be tailored by adjusting the type & concentration of nano-inclusions, resulting in complementary and adaptable characteristics. The exceptional and/or unique properties of the nanocomposites, including the high mechanical strength and stiffness, the ease of processing, and their lightweight nature, are attributed to the high surface area, the electrical and/or thermal conductivity of the nano-fillers, which make them appealing materials for a wide range of engineering applications. Polymeric «breathable» membranes enabling water vapor permeability (WVP) can be designed either by using micro/nano-fillers with the ability to interrupt the continuity of the polymer phase generating micro/nano-porous structures or/and by creating micro/nano-pores into the composite material by uniaxial/biaxial stretching. Among the nanofillers, carbon nanotubes (CNTs) exhibit particular high WVP and for this reason, they have already been proposed for gas separation membranes. In a similar context, they could prove to be promising alternative/complementary filler nano-materials, for the development of "breathable" products. Polypropylene (PP) is a commonly utilized thermoplastic polymer matrix in the development of composite films, due to its easy processability and low price, combined with its good chemical & physical properties. PP is known to present several crystalline phases (α, β and γ), depending on the applied treatment process, which have a significant impact on its final properties, particularly in terms of WVP. Specifically, the development of the β-phase in PP in combination with stretching is anticipated to modify the crystalline behavior and extend the microporosity of the polymer matrix exhibiting enhanced WVP. The primary objective of this study is to develop breathable nano-carbon based (functionalized MWCNTs) PP composite membranes, potentially also avoiding the stretching process. This proposed alternative is expected to have a better performance/cost ratio over current stretched PP/CaCO3 composite benchmark membranes. The focus is to investigate the impact of both β-nucleator(s) and nano-carbon fillers on water vapor transmission rate properties of relevant PP nanocomposites. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=carbon%20nanotubes" title="carbon nanotubes">carbon nanotubes</a>, <a href="https://publications.waset.org/abstracts/search?q=nanocomposites" title=" nanocomposites"> nanocomposites</a>, <a href="https://publications.waset.org/abstracts/search?q=nucleating%20agents" title=" nucleating agents"> nucleating agents</a>, <a href="https://publications.waset.org/abstracts/search?q=polypropylene" title=" polypropylene"> polypropylene</a>, <a href="https://publications.waset.org/abstracts/search?q=water%20vapor%20permeability" title=" water vapor permeability"> water vapor permeability</a> </p> <a href="https://publications.waset.org/abstracts/165337/investigation-of-polypropylene-composite-films-with-carbon-nanotubes-and-the-role-of-v-nucleating-agents-for-the-improvement-of-their-water-vapor-permeability" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/165337.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">74</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> Improved Mechanical and Electrical Properties and Thermal Stability of Post-Consumer Polyethylene Terephthalate Glycol Containing Hybrid System of Nanofillers</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Iman%20Taraghi">Iman Taraghi</a>, <a href="https://publications.waset.org/abstracts/search?q=Sandra%20Paszkiewicz"> Sandra Paszkiewicz</a>, <a href="https://publications.waset.org/abstracts/search?q=Daria%20Pawlikowska"> Daria Pawlikowska</a>, <a href="https://publications.waset.org/abstracts/search?q=Anna%20Szymczyk"> Anna Szymczyk</a>, <a href="https://publications.waset.org/abstracts/search?q=Izabela%20Irska"> Izabela Irska</a>, <a href="https://publications.waset.org/abstracts/search?q=Rafal%20Stanik"> Rafal Stanik</a>, <a href="https://publications.waset.org/abstracts/search?q=Amelia%20Linares"> Amelia Linares</a>, <a href="https://publications.waset.org/abstracts/search?q=Tiberio%20A.%20Ezquerra"> Tiberio A. Ezquerra</a>, <a href="https://publications.waset.org/abstracts/search?q=El%C5%BCbieta%20Piesowicz"> Elżbieta Piesowicz</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Currently, the massive use of thermoplastic materials in industrial applications causes huge amounts of polymer waste. The poly (ethylene glycol-co-1,4-cyclohexanedimethanol terephthalate) (PET-G) has been widely used in food packaging and polymer foils. In this research, the PET-G foils have been recycled and reused as a matrix to combine with different types of nanofillers such as carbon nanotubes, graphene nanoplatelets, and nanosized carbon black. The mechanical and electrical properties, as well as thermal stability and thermal conductivity of the PET-G, improved along with the addition of the aforementioned nanofillers and hybrid system of them. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=polymer%20hybrid%20nanocomposites" title="polymer hybrid nanocomposites">polymer hybrid nanocomposites</a>, <a href="https://publications.waset.org/abstracts/search?q=carbon%20nanofillers" title=" carbon nanofillers"> carbon nanofillers</a>, <a href="https://publications.waset.org/abstracts/search?q=recycling" title=" recycling"> recycling</a>, <a href="https://publications.waset.org/abstracts/search?q=physical%20performance" title=" physical performance"> physical performance</a> </p> <a href="https://publications.waset.org/abstracts/154938/improved-mechanical-and-electrical-properties-and-thermal-stability-of-post-consumer-polyethylene-terephthalate-glycol-containing-hybrid-system-of-nanofillers" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/154938.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">136</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> Carbon Supported Silver Nanostructures for Electrochemical Carbon Dioxide Reduction</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Sonali%20Panigrahy">Sonali Panigrahy</a>, <a href="https://publications.waset.org/abstracts/search?q=Manjunatha%20K."> Manjunatha K.</a>, <a href="https://publications.waset.org/abstracts/search?q=Sudip%20Barman"> Sudip Barman</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Electrocatalytic reduction methods hold significant promise in addressing the urgent need to mitigate excessive greenhouse gas emissions, particularly carbon dioxide (CO₂). A highly effective catalyst is essential for achieving the conversion of CO₂ into valuable products due to the complex, multi-electron, and multi-product nature of the CO₂ reduction process. The electrochemical reduction of CO₂, driven by renewable energy sources, presents a valuable opportunity for simultaneously reducing CO₂ emissions while generating valuable chemicals and fuels, with syngas being a noteworthy product. Silver-based electrodes have been the focus of extensive research due to their low overpotential and remarkable selectivity in promoting the generation of carbon monoxide (CO) in the electrocatalytic carbon dioxide reduction reaction (CO₂RR). In this study, we delve into the synthesis of carbon-supported silver nanoparticles (Ag/C), which serve as efficient electrocatalysts for the reduction of CO₂. The as-prepared catalyst, Ag/C, is not only cost-effective but also highly proficient in facilitating the conversion of CO₂ and H₂O into syngas, which is a customizable mixture of hydrogen (H₂) and carbon monoxide (CO). The highest faradic efficiency for the production of CO on Ag/C was calculated to be 56.4% at -1.4 V vs Ag/AgCl. The maximum partial current density for the generation of CO was determined to be -9.4 mA cm-2 at a potential of -1.6 V vs Ag/AgCl. This research demonstrates the potential of Ag/C as an electrocatalyst to enable the sustainable production of syngas, contributing to the reduction of CO₂ emissions and the synthesis of valuable chemical precursors and fuels. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=CO%E2%82%82" title="CO₂">CO₂</a>, <a href="https://publications.waset.org/abstracts/search?q=carbon%20monooxide" title=" carbon monooxide"> carbon monooxide</a>, <a href="https://publications.waset.org/abstracts/search?q=electrochemical" title=" electrochemical"> electrochemical</a>, <a href="https://publications.waset.org/abstracts/search?q=silver" title=" silver"> silver</a> </p> <a href="https://publications.waset.org/abstracts/174856/carbon-supported-silver-nanostructures-for-electrochemical-carbon-dioxide-reduction" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/174856.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">70</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> The Toxicity of Doxorubicin Connected with Nanotransporters</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Iva%20Blazkova">Iva Blazkova</a>, <a href="https://publications.waset.org/abstracts/search?q=Amitava%20Moulick"> Amitava Moulick</a>, <a href="https://publications.waset.org/abstracts/search?q=Vedran%20Milosavljevic"> Vedran Milosavljevic</a>, <a href="https://publications.waset.org/abstracts/search?q=Pavel%20Kopel"> Pavel Kopel</a>, <a href="https://publications.waset.org/abstracts/search?q=Marketa%20Vaculovicova"> Marketa Vaculovicova</a>, <a href="https://publications.waset.org/abstracts/search?q=Vojtech%20Adam"> Vojtech Adam</a>, <a href="https://publications.waset.org/abstracts/search?q=Rene%20Kizek"> Rene Kizek</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Doxorubicin is one of the most commonly used and the most effective chemotherapeutic drugs. This antracycline drug isolated from the bacteria Streptomyces peuceticus var. caesius is sold under the trade name Adriamycin (hydroxydaunomycin, hydroxydaunorubicin). Doxorubicin is used in single therapy to treat hematological malignancies (blood cancers, leukaemia, lymphoma), many types of carcinoma (solid tumors) and soft tissue sarcomas. It has many serious side effects like nausea and vomiting, hair lost, myelosupression, oral mucositis, skin reactions and redness, but the most serious one is the cardiotoxicity. Because of the risk of heart attack and congestive heart failure, the total dose administered to patients has to be accurately monitored. With the aim to lower the side effects and to targeted delivery of doxorubicin into the tumor tissue, the different nanoparticles are studied. The drug can be bound on a surface of nanoparticle, encapsulated in the inner cavity, or incorporated into the structure of nanoparticle. Among others, carbon nanoparticles (graphene, carbon nanotubes, fullerenes) are highly studied. Besides the number of inorganic nanoparticles, a great potential exhibit also organic ones mainly lipid-based and polymeric nanoparticle. The aim of this work was to perform a toxicity study of free doxorubicin compared to doxorubicin conjugated with various nanotransporters. The effect of liposomes, fullerenes, graphene, and carbon nanotubes on the toxicity was analyzed. As a first step, the binding efficacy of between doxorubicin and the nanotransporter was determined. The highest efficacy was detected in case of liposomes (85% of applied drug was encapsulated) followed by graphene, carbon nanotubes and fullerenes. For the toxicological studies, the chicken embryos incubated under controlled conditions (37.5 °C, 45% rH, rotation every 2 hours) were used. In 7th developmental day of chicken embryos doxorubicin or doxorubicin-nanotransporter complex was applied on the chorioallantoic membrane of the eggs and the viability was analyzed every day till the 17th developmental day. Then the embryos were extracted from the shell and the distribution of doxorubicin in the body was analyzed by measurement of organs extracts using laser induce fluorescence detection. The chicken embryo mortality caused by free doxorubicin (30%) was significantly lowered by using the conjugation with nanomaterials. The highest accumulation of doxorubicin and doxorubicin nanotransporter complexes was observed in the liver tissue <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=doxorubicin" title="doxorubicin">doxorubicin</a>, <a href="https://publications.waset.org/abstracts/search?q=chicken%20embryos" title=" chicken embryos"> chicken embryos</a>, <a href="https://publications.waset.org/abstracts/search?q=nanotransporters" title=" nanotransporters"> nanotransporters</a>, <a href="https://publications.waset.org/abstracts/search?q=toxicity" title=" toxicity "> toxicity </a> </p> <a href="https://publications.waset.org/abstracts/24930/the-toxicity-of-doxorubicin-connected-with-nanotransporters" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/24930.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">449</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> Electrochemical Biosensor Based on Chitosan-Gold Nanoparticles, Carbon Nanotubes for Detection of Ovarian Cancer Biomarker</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Parvin%20Samadi%20Pakchin">Parvin Samadi Pakchin</a>, <a href="https://publications.waset.org/abstracts/search?q=Reza%20Saber"> Reza Saber</a>, <a href="https://publications.waset.org/abstracts/search?q=Hossein%20Ghanbari"> Hossein Ghanbari</a>, <a href="https://publications.waset.org/abstracts/search?q=Yadollah%20Omidi"> Yadollah Omidi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Ovarian cancer is one of the leading cause of mortality among the gynecological malignancies, and it remains the one of the most prevalent cancer in females worldwide. Tumor markers are biochemical molecules in blood or tissues which can indicates cancers occurrence in the human body. So, the sensitive and specific detection of cancer markers typically recruited for diagnosing and evaluating cancers. Recently extensive research efforts are underway to achieve a simple, inexpensive and accurate device for detection of cancer biomarkers. Compared with conventional immunoassay techniques, electrochemical immunosensors are of great interest, because they are specific, simple, inexpensive, easy to handling and miniaturization. Moreover, in the past decade nanotechnology has played a crucial role in the development of biosensors. In this study, a signal-off electrochemical immunosensor for the detection of CA125 antigen has been developed using chitosan-gold nanoparticles (CS-AuNP) and multi-wall carbon nanotubes (MWCNT) composites. Toluidine blue (TB) is used as redox probe which is immobilized on the electrode surface. CS-AuNP is synthesized by a simple one step method that HAuCl4 is reduced by NH2 groups of chitosan. The CS-AuNP-MWCNT modified electrode has shown excellent electrochemical performance compared with bare Au electrode. MWCNTs and AuNPs increased electrochemical conductivity and accelerate electrons transfer between solution and electrode surface while excessive amine groups on chitosan lead to the effective loading of the biological material (CA125 antibody) and TB on the electrode surface. The electrochemical, immobilization and sensing properties CS-AuNP-MWCNT-TB modified electrodes are characterized by cyclic voltammetry, electrochemical impedance spectroscopy, differential pulse voltammetry and square wave voltammetry with Fe(CN)63−/4−as an electrochemical redox indicator. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=signal-off%20electrochemical%20biosensor" title="signal-off electrochemical biosensor">signal-off electrochemical biosensor</a>, <a href="https://publications.waset.org/abstracts/search?q=CA125" title=" CA125"> CA125</a>, <a href="https://publications.waset.org/abstracts/search?q=ovarian%20cancer" title=" ovarian cancer"> ovarian cancer</a>, <a href="https://publications.waset.org/abstracts/search?q=chitosan-gold%20nanoparticles" title=" chitosan-gold nanoparticles"> chitosan-gold nanoparticles</a> </p> <a href="https://publications.waset.org/abstracts/79114/electrochemical-biosensor-based-on-chitosan-gold-nanoparticles-carbon-nanotubes-for-detection-of-ovarian-cancer-biomarker" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/79114.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">290</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> Effect of Carbon Nanotube Reinforcement in Polymer Composite Plates under Static Loading</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=S.%20Madhu">S. Madhu</a>, <a href="https://publications.waset.org/abstracts/search?q=V.%20V.%20Subba%20Rao"> V. V. Subba Rao</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In the implementation of carbon nanotube reinforced polymer matrix composites in structural applications, deflection and stress analysis are important considerations. In the present study, a multi scale analysis of deflection and stress analysis of carbon nanotube (CNT) reinforced polymer composite plates is presented. A micromechanics model based on the Mori-Tanaka method is developed by introducing straight CNTs aligned in one direction. The effect of volume fraction and diameter of CNTs on plate deflection and the stresses are investigated using Classical Laminate Plate Theory (CLPT). The study is primarily conducted with the intention of observing the suitability of CNT reinforced polymer composite plates under static loading for structural applications. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=carbon%20nanotube" title="carbon nanotube">carbon nanotube</a>, <a href="https://publications.waset.org/abstracts/search?q=micromechanics" title=" micromechanics"> micromechanics</a>, <a href="https://publications.waset.org/abstracts/search?q=composite%20plate" title=" composite plate"> composite plate</a>, <a href="https://publications.waset.org/abstracts/search?q=multi-scale%20analysis" title=" multi-scale analysis"> multi-scale analysis</a>, <a href="https://publications.waset.org/abstracts/search?q=classical%20laminate%20plate%20theory" title=" classical laminate plate theory"> classical laminate plate theory</a> </p> <a href="https://publications.waset.org/abstracts/5931/effect-of-carbon-nanotube-reinforcement-in-polymer-composite-plates-under-static-loading" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/5931.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">372</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> Chatter Prediction of Curved Thin-walled Parts Considering Variation of Dynamic Characteristics Based on Acoustic Signals Acquisition</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Damous%20Mohamed">Damous Mohamed</a>, <a href="https://publications.waset.org/abstracts/search?q=Zeroudi%20Nasredine"> Zeroudi Nasredine</a> </p> <p class="card-text"><strong>Abstract:</strong></p> High-speed milling of thin-walled parts with complex curvilinear profiles often encounters machining instability, commonly referred to as chatter. This phenomenon arises due to the dynamic interaction between the cutting tool and the part, exacerbated by the part's low rigidity and varying dynamic characteristics along the tool path. This research presents a dynamic model specifically developed to predict machining stability for such curved thin-walled components. The model employs the semi-discretization method, segmenting the tool trajectory into small, straight elements to locally approximate the behavior of an inclined plane. Dynamic characteristics for each segment are extracted through experimental modal analysis and incorporated into the simulation model to generate global stability lobe diagrams. Validation of the model is conducted through cutting tests where acoustic intensity is measured to detect instabilities. The experimental data align closely with the predicted stability limits, confirming the model's accuracy and effectiveness. This work provides a comprehensive approach to enhancing machining stability predictions, thereby improving the efficiency and quality of high-speed milling operations for thin-walled parts. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=chatter" title="chatter">chatter</a>, <a href="https://publications.waset.org/abstracts/search?q=curved%20thin-walled%20part" title=" curved thin-walled part"> curved thin-walled part</a>, <a href="https://publications.waset.org/abstracts/search?q=semi-discretization%20method" title=" semi-discretization method"> semi-discretization method</a>, <a href="https://publications.waset.org/abstracts/search?q=stability%20lobe%20diagrams" title=" stability lobe diagrams"> stability lobe diagrams</a> </p> <a href="https://publications.waset.org/abstracts/190548/chatter-prediction-of-curved-thin-walled-parts-considering-variation-of-dynamic-characteristics-based-on-acoustic-signals-acquisition" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/190548.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> The Role of Halloysite’s Surface Area and Aspect Ratio on Tensile Properties of Ethylene Propylene Diene Monomer Nanocomposites </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Pooria%20Pasbakhsh">Pooria Pasbakhsh</a>, <a href="https://publications.waset.org/abstracts/search?q=Rangika%20T.%20De%20Silva"> Rangika T. De Silva</a>, <a href="https://publications.waset.org/abstracts/search?q=Vahdat%20Vahedi"> Vahdat Vahedi</a>, <a href="https://publications.waset.org/abstracts/search?q=Hanafi%20Ismail"> Hanafi Ismail</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The influence of three different types of halloysite nanotubes (HNTs) with different dimensions, namely as camel lake (CLA), Jarrahdale (JA) and Matauri Bay (MB), on their reinforcing ability of ethylene propylene dine monomer (EPDM) were investigated by varying the HNTs loading (from 0-15 phr). Mechanical properties of the nanocomposites improved with addition of all three HNTs, but CLA based nanocomposites exhibited a significant enhancement compared to the other HNTs. For instance, tensile properties of EPDM nanocomposites increased by 120%, 256% and 340% for MB, JA, and CLA, respectively with addition of 15 phr of HNTs. This could be due to the higher aspect ratio and higher surface area of CLA compared to others. Scanning electron microscopy (SEM) of nanocomposites at 15 phr of HNT loadings showed low amounts of pulled-out nanotubes which confirmed the presence of more embedded nanotubes inside the EPDM matrix, as well as aggregates within the fracture surface of EPDM/HNT nanocomposites. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=aspect%20ratio" title="aspect ratio">aspect ratio</a>, <a href="https://publications.waset.org/abstracts/search?q=halloysite%20nanotubes%20%28HNTs%29" title=" halloysite nanotubes (HNTs)"> halloysite nanotubes (HNTs)</a>, <a href="https://publications.waset.org/abstracts/search?q=mechanical%20properties" title=" mechanical properties"> mechanical properties</a>, <a href="https://publications.waset.org/abstracts/search?q=rubber%2Fclay%20nanocomposites" title=" rubber/clay nanocomposites"> rubber/clay nanocomposites</a> </p> <a href="https://publications.waset.org/abstracts/17259/the-role-of-halloysites-surface-area-and-aspect-ratio-on-tensile-properties-of-ethylene-propylene-diene-monomer-nanocomposites" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/17259.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">375</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> Noninvasive Disease Diagnosis through Breath Analysis Using DNA-functionalized SWNT Sensor Array</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=W.%20J.%20Zhang">W. J. Zhang</a>, <a href="https://publications.waset.org/abstracts/search?q=Y.%20Q.%20Du"> Y. Q. Du</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20L.%20Wang"> M. L. Wang</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Noninvasive diagnostics of diseases via breath analysis has attracted considerable scientific and clinical interest for many years and become more and more promising with the rapid advancement in nanotechnology and biotechnology. The volatile organic compounds (VOCs) in exhaled breath, which are mainly blood borne, particularly provide highly valuable information about individuals’ physiological and pathophysiological conditions. Additionally, breath analysis is noninvasive, real-time, painless and agreeable to patients. We have developed a wireless sensor array based on single-stranded DNA (ssDNA)-decorated single-walled carbon nanotubes (SWNT) for the detection of a number of physiological indicators in breath. Eight DNA sequences were used to functionalize SWNT sensors to detect trace amount of methanol, benzene, dimethyl sulfide, hydrogen sulfide, acetone and ethanol, which are indicators of heavy smoking, excessive drinking, and diseases such as lung cancer, breast cancer, cirrhosis and diabetes. Our tests indicated that DNA functionalized SWNT sensors exhibit great selectivity, sensitivity, reproducibility, and repeatability. Furthermore, different molecules can be distinguished through pattern recognition enabled by this sensor array. Thus, the DNA-SWNT sensor array has great potential to be applied in chemical or bimolecular detection for the noninvasive diagnostics of diseases and health monitoring. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=breath%20analysis" title="breath analysis">breath analysis</a>, <a href="https://publications.waset.org/abstracts/search?q=diagnosis" title=" diagnosis"> diagnosis</a>, <a href="https://publications.waset.org/abstracts/search?q=DNA-SWNT%20sensor%20array" title=" DNA-SWNT sensor array"> DNA-SWNT sensor array</a>, <a href="https://publications.waset.org/abstracts/search?q=noninvasive" title=" noninvasive"> noninvasive</a> </p> <a href="https://publications.waset.org/abstracts/36968/noninvasive-disease-diagnosis-through-breath-analysis-using-dna-functionalized-swnt-sensor-array" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/36968.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">348</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> Carbon Credits in Voluntary Carbon Markets: A Proposal for Iran</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Saeed%20Mohammadirad">Saeed Mohammadirad</a> </p> <p class="card-text"><strong>Abstract:</strong></p> During the first commitment period of the Kyoto Protocol, many developed countries were forced to restrict carbon emissions. Although Iran was one of the countries of Kyoto protocol, due to some special conditions, it was not required to restrict its carbon emissions. Flexible mechanisms were developed to assist countries responsible for reducing their carbon emissions, and regulated carbon markets were introduced. Carbon credits which are provided by organizations in countries with no responsibility to restrict their carbon emissions are traded in voluntary markets. This study focuses on how to measure and report the carbon allowances and carbon credits from accounting view point under both regulated and voluntary markets. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=carbon%20credits" title="carbon credits">carbon credits</a>, <a href="https://publications.waset.org/abstracts/search?q=carbon%20markets" title=" carbon markets"> carbon markets</a>, <a href="https://publications.waset.org/abstracts/search?q=accounting" title=" accounting"> accounting</a>, <a href="https://publications.waset.org/abstracts/search?q=flexible%20mechanisms" title=" flexible mechanisms"> flexible mechanisms</a> </p> <a href="https://publications.waset.org/abstracts/29797/carbon-credits-in-voluntary-carbon-markets-a-proposal-for-iran" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/29797.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info 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