Relevant bibliographies by topics / Nanotubes. Nanostructured materials. Carbon composites

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers

Academic literature on the topic 'Nanotubes. Nanostructured materials. Carbon composites'

Author: Grafiati
Published: 4 June 2021
Last updated: 10 February 2022

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Journal articles on the topic "Nanotubes. Nanostructured materials. Carbon composites"

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Loayza, Cristhian RL, Paulo DC Assunção, Danyella CS Cardoso, Diego JA Borges, Ademir AC Filho, Marcos AL Reis, and Eduardo M. Braga. "Incorporation of AWS 316L wire nanostructured with nickel-carbon nanotube by arc welding." Journal of Composite Materials 52, no. 14 (October 17, 2017): 1899–906. http://dx.doi.org/10.1177/0021998317735880.

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Carbon nanotubes have certain properties, such as 150 GPa tensile strength, a 1000 GPa shear modulus, an electrical conductivity of 60 S/m, and a high thermal conductivity of 2500 W/mk, that make them an optimum metallic matrix composite reinforcement. Otherwise, arc welding is a common industrial process that joins almost all metals. However, there are hardly any studies involving the addition of carbon nanotubes in stainless steel so far. In this research, we show the incorporation of an AWS 316L nanostructured wire with nickel-carbon nanotubes in austenitic stainless steel via pulsed gas tungsten arc welding, which formed nanocomposites with 0.75 and 1.5 wt% carbon nanotube contents in the wire. The characterization was performed by scanning electronic microscope, Raman spectroscopy, and X-ray diffraction. The Vickers microhardness test was used to analyze the mechanical properties. The nanostructure composite had microstructure modification, and superficial microhardness improved in 35% for 0.75 wt% carbon nanotube.
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Lu, Shu-Nan, Ning Xie, Li-Chao Feng, and Jing Zhong. "Applications of Nanostructured Carbon Materials in Constructions: The State of the Art." Journal of Nanomaterials 2015 (2015): 1–10. http://dx.doi.org/10.1155/2015/807416.

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The most recent studies on the applications of nanostructured carbon materials, including carbon nanotubes, carbon nanofibers, and graphene oxides, in constructions are presented. First, the preparation of nanostructured carbon/infrastructure material composites is summarized. This part is mainly focused on how the nanostructured carbon materials were mixed with cementitious or asphalt matrix to realize a good dispersion condition. Several methods, including high speed melting mixing, surface treatment, and aqueous solution with surfactants and sonication, were introduced. Second, the applications of the carbon nanostructured materials in constructions such as mechanical reinforcement, self-sensing detectors, self-heating element for deicing, and electromagnetic shielding component were systematically reviewed. This paper not only helps the readers understand the preparation process of the carbon nanostructured materials/infrastructure material composites but also sheds some light on the state-of-the-art applications of carbon nanostructured materials in constructions.
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Aida, Takuzo, and Takanori Fukushima. "Soft materials with graphitic nanostructures." Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 365, no. 1855 (April 11, 2007): 1539–52. http://dx.doi.org/10.1098/rsta.2007.2030.

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This review article focuses on our recent studies on novel soft materials consisting of carbon nanotubes. Single-walled carbon nanotubes, when suspended in imidazolium ion-based ionic liquids and ground in an agate mortar, form physical gels (bucky gels), where heavily entangled bundles of carbon nanotubes are exfoliated to give highly dispersed, much finer bundles. By using bucky gels, the first printable actuators that operate in air for a long time without any external electrolyte are developed. Furthermore, the use of polymerizable ionic liquids as the gelling media results in the formation of electroconductive polymer/nanotube composites with enhanced mechanical properties. The article also highlights a new family of nanotubular graphite, via self-assembly of amphiphilic hexabenzocoronene (HBC) derivatives. The nanotubes consist of a graphitic wall composed of a great number of π-stacked HBC units and are electroconductive upon oxidation. The use of amphiphilic HBCs with functional groups results in the formation of nanotubes with various interesting properties.
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Subramanian, V., Hongwei Zhu, and Bingqing Wei. "Nanostructured manganese oxides and their composites with carbon nanotubes as electrode materials for energy storage devices." Pure and Applied Chemistry 80, no. 11 (January 1, 2008): 2327–43. http://dx.doi.org/10.1351/pac200880112327.

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Manganese oxides have been synthesized by a variety of techniques in different nanostructures and studied for their properties as electrode materials in two different storage applications, supercapacitors (SCs) and Li-ion batteries. The composites involving carbon nanotubes (CNTs) and manganese oxides were also prepared by a simple room-temperature method and evaluated as electrode materials in the above applications. The synthesis of nanostructured manganese oxides was carried out by simple soft chemical methods without any structure directing agents or surfactants. The prepared materials were well characterized using different analytical techniques such as X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), surface area studies, etc. The electrochemical properties of the nanostructured manganese oxides and their composites were studied using cyclic voltammetry (CV), galvanostatic charge-discharge, and electrochemical impedance spectroscopic (EIS) studies. The influence of structural/surface properties on the electrochemical performance of the synthesized manganese oxides is reviewed.
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Loginos, Panagiotis, Anastasios Patsidis, and Vasilios Georgakilas. "UV-Cured Poly(Ethylene Glycol) Diacrylate/Carbon Nanostructure Thin Films. Preparation, Characterization, and Electrical Properties." Journal of Composites Science 4, no. 1 (January 1, 2020): 4. http://dx.doi.org/10.3390/jcs4010004.

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Carbon nanoallotropes such as carbon nanotubes, graphene, and their derivatives have been combined with a plethora of polymers in the last years to develop new composite materials with interesting properties and applications. However, the area of photopolymer composites with carbon nanostructures has not been analogously explored. In the present article, we study the photopolymerization of poly(ethylene glycol)diacrylate (PEGDA) enriched with different carbon nanoallotropes like graphene, pristine and chemically modified carbon nanotubes (CNTs and fCNTs), and a hybrid of graphene and CNTs. The products were characterized by several microscopic and spectroscopic techniques and the electrical conductivity was studied as a function of the concentrations of carbon nanoallotropes. In general, stable thin films were produced with a concentration of carbon nanostructures up to 8.5%, although the addition of carbon nanostructures in PEGDA decreases the degree of photopolymerization, and PEDGA/carbon nanostructure composites showed electrical conductivity at a relatively low percentage.
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Комаров, Ф. Ф., И. Д. Парфимович, А. Г. Ткачев, А. В. Щегольков, О. В. Мильчанин, А. В. Щегольков, and В. Бондарев. "Влияние методов формирования полимерных композитных материалов с углеродными нанотрубками на механизмы электропроводности." Журнал технической физики 91, no. 3 (2021): 475. http://dx.doi.org/10.21883/jtf.2021.03.50526.222-20.

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The influence of the method of formation of nanostructured polymer composites filled with carbon nanotubes to their electrophysical properties was carried out. The influence of the «size effect» of multi-walled carbon nanotubes, functionalization method, and ultrasonic treatment method on the electrical conductivity of composite materials in the frequency range 50 Hz - 5 MHz and the temperature range 15 - 375 K has been established. The presence of various mechanisms of electric transport in composite materials that affect the final value of electrical conductivity is established. The best results of electrophysical parameters are observed with a combination of non-covalent functionalization of nanotubes and high-power ultrasonic exposure. This method allows us to achieve a conductivity value of composite materials of 0.01 S/cm in the studied frequency range at a filler concentration of 0.5 wt.%.
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Yang, Yun Shik, Myeong Jun Kim, Young Chul Lee, and Si Tae Noh. "Conductive Property of Carbon-Nanotube Dispersed Nanocomposite Coatings for Steel." Solid State Phenomena 135 (February 2008): 35–38. http://dx.doi.org/10.4028/www.scientific.net/ssp.135.35.

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Nanostructured modification of polymers has opened up new perspective for multifunctional materials. Carbon-nanotubes have the potential to increase the conductivity of their composite, with improved or retaining mechanical performance. This study focuses on the evaluation of the thermal and electrical conductivities of carbonnanotube filled alkyd resins for steel coatings. Polymer/Carbon-nanotube nanocomposites have been prepared by mixing commercial multiwall carbon-nanotubes with alkyd resins and by curing. The thermal and electrical conductivities of carbon-nanotubes filled nanocomposite was found to be increased comparing with the original resin without any fillers or with the resin with carbon-black or carbon-nanofiber.
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Koilraj, T. Thomas, and K. Kalaichelvan. "Hybrid Nanocomposites – A Review." Applied Mechanics and Materials 766-767 (June 2015): 50–56. http://dx.doi.org/10.4028/www.scientific.net/amm.766-767.50.

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Since the last ten years, research happenings in the field of nanomaterials have been increased dramatically. Materials scientists and researchers have realized that the mechanical properties of materials can be altered at the fundamental level, i.e. at the atomic-scale. Carbon nanotubes have been well recognized as nanostructural materials that can be used to modify mechanical, thermal and electrical properties of polymer-based composite materials, because of their excellent properties and perfect atom arrangement. In geneal, scientific research related to the nanotubes and their co-related polymer based composites can be distinguished into four particular scopes: (i) production of high purity and well-regulated nanotubes, in terms of their size, length and chiral arrangement; (ii) enhancement of interfacial bonding strength between the nanotubes and their surrounding matrix; (iii) control of the dispersion properties and alignment of the nanotubes in nanotube/polymer composites and (iv) applications of the nanotube in real life. Research shows that addition of resin with nanoclays permits to retain stiffness without losing toughness, and also improving barrier and thermal properties. Dynamic Mechanical Analysis (DMA) studies revealed that filling the carbon nanotube into epoxy can produce a 90% enhancement in storage modulus and a 22°C increase in Tg. Addition of nanoclay and epoxy with nanotubes forms a hybrid nanocomposite.
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Rao, Apparao M., Xiaohua Ji, and Terry M. Tritt. "Properties of Nanostructured One-Dimensional and Composite Thermoelectric Materials." MRS Bulletin 31, no. 3 (March 2006): 218–23. http://dx.doi.org/10.1557/mrs2006.48.

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AbstractOver a decade ago, Dresselhaus predicted that low-dimensional systems would one day serve as a route to enhanced thermoelectric performance.In this article, recent results in the thermoelectric properties of nanowires and nanotubes are discussed. Various synthesis techniques will be presented, including chemical vapor deposition for the growth of thermoelectric nanostructures in templated alumina.Electrical transport measurements of carbon nanostructures, such as resistivity and thermopower, have revealed some very interesting thermoelectric properties.Challenges still remain concerning the measurement of individual nanostructures such as nanowires.Much work has been performed on the thermoelectric properties of carbon nanotubes, and these results will be highlighted.In addition, routes for enhanced thermoelectric materials have focused on incorporating nanostructures within the bulk materials.The role of these “hybrid composite structures” based on nanomaterials incorporated into the bulk matrix and the potential for enhanced performance are discussed.
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Slepičková Kasálková, Nikola, Petr Slepička, and Václav Švorčík. "Carbon Nanostructures, Nanolayers, and Their Composites." Nanomaterials 11, no. 9 (September 12, 2021): 2368. http://dx.doi.org/10.3390/nano11092368.

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The versatility of the arrangement of C atoms with the formation of different allotropes and phases has led to the discovery of several new structures with unique properties. Carbon nanomaterials are currently very attractive nanomaterials due to their unique physical, chemical, and biological properties. One of these is the development of superconductivity, for example, in graphite intercalated superconductors, single-walled carbon nanotubes, B-doped diamond, etc. Not only various forms of carbon materials but also carbon-related materials have aroused extraordinary theoretical and experimental interest. Hybrid carbon materials are good candidates for high current densities at low applied electric fields due to their negative electron affinity. The right combination of two different nanostructures, CNF or carbon nanotubes and nanoparticles, has led to some very interesting sensors with applications in electrochemical biosensors, biomolecules, and pharmaceutical compounds. Carbon materials have a number of unique properties. In order to increase their potential application and applicability in different industries and under different conditions, they are often combined with other types of material (most often polymers or metals). The resulting composite materials have significantly improved properties.
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Dissertations / Theses on the topic "Nanotubes. Nanostructured materials. Carbon composites"

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Yao, Yanli. "Development of amperometric biosensors with carbon nanotube composite materials." HKBU Institutional Repository, 2008. http://repository.hkbu.edu.hk/etd_ra/895.

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Kim, Il Tae. "Carbon-based magnetic nanohybrid materials for polymer composites and electrochemical energy storage and conversion." Diss., Georgia Institute of Technology, 2011. http://hdl.handle.net/1853/45876.

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The role of nanohybrid materials in the fields of polymer composites and electrochemical energy systems is significant since they affect the enhanced physical properties and improved electrochemical performance, respectively. As basic nanomaterials, carbon nanotubes and graphene were utilized due to their outstanding physical properties. With these materials, hybrid nanostructures were generated through a novel synthesis method, modified sol-gel process; namely, carbon nanotubes (CNTs)-maghemite and reduced graphene oxide (rGO)-maghemite nanohybrid materials were developed. In the study on polymer composities, developed CNTs-maghemite (magnetic carbon nanotbues (m-CNTs)) were readily aligned under an externally applied magnetic field, and due to the aligned features of m-CNTs in polymer matrices, it showed much enhanced anisotropic electrical and mechanical properties. In the study on electrochemical energy system (Li-ion batteries), rGO-maghemite were used as anode materials; as a result, they showed improved electrochemical performance for Li-ion batteries due to their specific morphology and characteristics.
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Zhang, Xiefei. "Studies on Single Wall Carbon Nanotube and Polymer Composite Films and Fibers." Diss., Georgia Institute of Technology, 2004. http://hdl.handle.net/1853/7610.

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Single wall carbon nanotubes (SWNT) have been extensively studied over the last decade due to their excellent comprehensive properties for a variety of applications. This study is focused on the applications of SWNTs as reinforcement for polymer matrices. Due to van der Waal interactions, SWNTs form bundles of about 30 nm diameters. In order to take full advantage of the SWNT mechanical properties, SWNT must exfoliate or at least disperse in small diameter bundle size. Optical microscopy and SEM only give qualitative information of dispersion. Quantitative characterization through TEM or AFM can be time consuming in order to get statistical result. In this study, simple method is developed to quantitatively estimate the size of SWNT bundle in dispersion based on the geometry controlled electrical percolation behavior. The SWNTs can be dispersed /exfoliated via PVP wrapped SWNT aqueous dispersion assisted by surfactants such as sodium dodycel sulfate. PVA / SWNT composite films prepared through PVP wrapped SWNTs exhibit improved mechanical properties as well as the evidence of load transfer from the polymer matrix to the SWNT as monitored by the Raman spectroscopy. SWNT can also be well dispersed into PVA/DMSO/H2O solution. Gel spinning of PVA/SWNT composite fiber has been successfully carried out with improved mechanical properties. Functionalized tubes can be used to enhance SWNT dispersion and exfoliation. Oxidation in strong acids is one method used for functionalizing nanotubes. SWNTs have been functionalized in nitric acid. The structure and properties of films (buckypaper) processed from nitric acid functionalized tubes have been studied exhibiting high tensile strength and high electrical conductivity. Nitric acid treatment results in selective degradation of the small diameter tubes.
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Zhu, Ronghua (Richard). "Atomistic Simulation of Nanostructured Materials." University of Akron / OhioLINK, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=akron1164059775.

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Ford, Ericka N. J. "Carbon nanotubes as structural templates within poly(vinyl alcohol) composite fibers." Diss., Georgia Institute of Technology, 2012. http://hdl.handle.net/1853/45921.

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Because the gel-spinning process has the potential to yield fibers of high strength and high modulus, this technique was employed to process continuous filaments of PVA/CNT, having CNTs at ¡Ü1 weight percent of polymer. A gel aging technique was employed with the goal of increasing the draw ratio for composite fibers and for promoting the development of crystalline PVA. Since residual solvent can lower the mechanical properties of drawn fibers, solvent phases of water and dimethyl sulfoxide (DMSO) within the drawn fibers were also characterized. As embedded SWNTs were uniaxially aligned along the drawn fiber axis, they were found to induce preferential alignment in the PVA side groups as well as for the residual solvent. This was attributed to charge transfer between SWNT and the respective functional groups. This orientation behavior has been characterized using Raman spectroscopy and infra-red dichroism. The behaviors of gel crystallization and solvent freezing within PVA/CNT dispersions were studied using thermal analysis and rheology. Carbon nanotubes were found to nucleate PVA crystallization in the gel state. PVA/CNT gel aging behavior was characterized by structural, thermal, and mechanical, and dynamic mechanical means. Gel aging was shown to increase the draw ratio of PVA/CNT fibers, and the development of the higher temperature melting peak was attributed to the draw induced ordering of PVA along CNTs. The scanning electron micrographs of fractured PVA/CNT fibers showed fibrils having an average diameter of about 22 nm. The storage modulus of aged gel was a function of solvent diffusion, which changed with aging time. CNTs were shown to have stabilized the gel network, as characterized by the dynamic mechanical properties, and to provide nucleation sites for the ordering of PVA chains, as characterized by WAXD.
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Oubenali, Mustapha. "Synthèse par dépôt chimique en phase vapeur catalytique (C-CVD) de nanostructures de carbone et leurs applications en catalyse et pour des matériaux composites." Thesis, Toulouse, INPT, 2011. http://www.theses.fr/2011INPT0058/document.

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Dans ce travail, nous décrivons les différentes formes, la structure, les propriétés et la croissance catalytique de nanotubes et nanofibres de carbone (Chapitre I). L'hydroxyapatite a été utilisée comme support de la phase active pour la synthèse de nanotubes de carbone multi-feuillet (MWCNTs) et de nanofibres de carbone (CNFs-H) par la technique de dépôt chimique en phase de vapeur catalytique (C-CVD) en lit fluidisé (Chapitre II). Après l'élimination du support par un simple lavage à l'acide chloridrique dilué, une étude théorique et expérimentale de l'oxydation de la surface de nanotubes de carbone par un traitement à l'acide nitrique a permis d'une part d'identifier et de quantifier les groupes formés à la surface de nanostructures carbonées et d'autre part de proposer un mécanisme pour la formation de ces groupes (Chapitre III). Les matériaux résultants après génération des fonctions carboxyliques de surface ont été utilisés comme support de catalyseur. L'hydrogénation du p-halogénonitrobenzène a été choisit comme réaction modèle pour comparer les performances catalytiques de catalyseurs à base de ruthénium en fonction de la nature du support utilisé, MWCNTs ou CNFs-H. L'influence de certains paramètres tels que la température, la nature du substrat et un traitement thermique du catalyseur (activation) est présentée. Une explication des performances catalytiques est proposée après caractérisation du catalyseur par MET, TPD, TPR et PZC (Chapitre IV). Les nanostructures carbonnées produites et caractérisées ont été utilisées comme charge de renforcement d'hydroxyapatites connue comme biomatériaux. Nous avons étudié en particulier la capacité de germination du phosphate octocalcique par la méthode de croissance cristalline à composition constante (C4) (Chapitre V)
In this work, we describe the different forms, the catalytic growth, the structure and properties of carbon nanotubes and nanofibres (Chapter I). Hydroxyapatite was used as catalyst support for the synthesis of multi-walled carbon nanotubes (MWCNTs) and nanofibres (CNFs) by catalytic chemical vapour deposition (C-CVD) in a fluidized bed reactor (Chapter II). After support removal by washing with diluted hydrochloric acid, a theoretical and experimental study of surface oxidation of carbon nanotubes by nitric acid treatment has been performed. It allows to identify and quantify the groups formed on the surface of carbon nanostructures and also to propose a mechanism for the formation of these groups (Chapter III). The functionalized nanotubes and nanofibers have been used as supports for heterogeneous catalysis. The hydrogenation of p-halonitrobenzene was used as model reaction to compare the catalytic performances of ruthenium supported on MWCNTs or CNFs-H catalysts. The influence of experimental parameters such as temperature, nature of the substrate and prior heat treatment (activation) of the catalyst on the catalytic activity and selectivity is presented. The catalytic performances have been correlated to the structure of the catalyst as determined from TEM, TPD, TPR and PZC analysis (Chapter IV). The carbon nanostructures produced have also been used as reinforcement fillers for hydroxyapatite-nanotube composites. We have studied in particular, the germination of octacalcium phosphate crystals under conditions of constant solution composition on the surface of the composite (Chapter V)
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Steiner, Stephen Alan III. "Engineering carbon nanostructures : development of novel aerogel-nanotube composites and optimization techniques for nanotube growth." Thesis, Massachusetts Institute of Technology, 2006. http://hdl.handle.net/1721.1/36216.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 2006.
Includes bibliographical references (leaves 219-233).
Carbon aerogels offer several unique advantages which make them ideal for evaluating a metal's ability to catalyze nanotube growth, including in situ carbothermic reduction of oxidized nanoparticles to their catalytic metallic phase as they form and production of a bulk quantity of nanoparticles which can be easily characterized. In this work, metal-doped carbon aerogels of seven transition metals were synthesized, characterized, and evaluated for their ability to catalyze growth of carbon nanotubes by thermal chemical vapor deposition (CVD). It was found that carbon aerogels doped with Fe, Rh, Re, Au, and Nb all catalyzed the formation of nanotubes in moderate to high yields, resulting in a direct growth of nanotubes on the exterior surfaces of aerogel monoliths. Ta was found to grow nanotubes only after thorough reduction of its oxides. Growth with W was inconclusive. CVD growth of nanotubes throughout the interior porosity of metal-doped carbon aerogels was also achieved by templating a network of interconnected macropores into the monoliths. Surface-based nanoparticles composed of rhenium, gold, and varying combinations of gold and rhenium were investigated for their ability to catalyze carbon nanotube growth.
(cont.) Nanoparticles of these metals were nucleated onto silicon wafers from solutions of anhydrous ReCI5 and AuC13. After deposition, the nanoparticles were reduced under hydrogen for 10 min and then oxidized in air for 4 min. The samples were then processed by CVD employing hydrogen and ethanol-saturated Ar for 10 min. Nanoparticles deposited from metal chloride solutions with a 1:1 molar ratio of gold to rhenium or higher were found to result in high yields of single-walled nanotubes, where nanoparticles deposited from solutions with less than a 1:4 gold-to-rhenium ratio resulted in no nanotube growth. Lastly, a new low-pressure CVD system specialized for nanotube growth was developed. The objectives of the system are to provide a flexible architecture for developing new nanotube growth techniques and to lower the minimum temperature required for nanotube growth. The system features a separate sample heating plate for thermally activating nanoparticles and hot filament for carbon feedstock cracking. The system also features the ability to easily install or remove modules for electric field- and plasma-assisted growths.
by Stephen Alan Steiner, III.
S.M.
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Naguib, Nevin N. Gogot︠s︡i I︠U︡ G. "Filling and chemical modification of carbon nanotubes /." Philadelphia, Pa. : Drexel University, 2004. http://dspace.library.drexel.edu/handle/1860/343.

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Tahhan, May. "Carbon nanotubes and conducting polymer composites." Intelligent Polymers Research Institute - Faculty of Science, 2004. http://ro.uow.edu.au/theses/407.

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A nanocomposite is defined as a material of more than one solid phase, where at least one dimension falls in the nanometer range. The combination of carbon nanotubes (CNT) and conducting polymers offers an attractive route for the production of novel compounds that can be used in a variety of application such as sensors, actuators, and molecular scale electronic devices. The ultimate goal of this work is to develop and investigate CNT composites that provide a structural functionality together with one or more other key functions. A variety of novel CNT dispersions were prepared using commercially available CNT systems such as Rice single-walled carbon nanotubes (RCNT), HiPco single-walled carbon nanotubes (HCNT), and Multi-walled carbon nanotube (MWCNT). This study explored the application of novel functional dispersing agents. Deoxyribose Nucleic Acid (DNA) a biological molecule, N- sopropylacrylamide 2-acrylamido-2-methyl-1-propanesulfonic acid (NIPPAm-AMPS) a polyelectrolyte, Didodecyldimethyl ammonium bromide (DDAB) a polymerizable compound, Poly(methoxyaniline-5-sulfonic acid) (PMAS) an inherently conducting polymer, and PVA an insulating polymer were some of the agents used to disperse the CNT. These dispersions were then evaluated in term of their stability and ability to effectively disperse the CNT. Solid-state CNT composites (mats) were then prepared by means of pressure filtration of the CNT/dispersant solutions. These mats were characterized using a variety of different techniques to determine their viability to be used as mechanical actuators or electrochemical devices. The characterization methods included cyclic voltammetry, conductivity, capacitance, atomic force microscopy, scanning electron microscopy, Young’s modulus, and actuation measurements. Abstract RCNT/conducting polymer composites were prepared by the electropolymerization of Pyrrole with a range of different dopant anions in the presence of different RCNT dispersions. In these composites, the RCNT were completely covered by the polymer, consequently the electrochemical responses of these composites were dominated by the electrochemistry of the polymers with the CNT functioning as a conductor element. Polypyrrole was also electropolymerized using functionalized multi-walled carbon nanotubes (FMWCNT) as dopant. Electropolymerization was carried out using galvanostatic and potentiostatic techniques on gold-coated Mylar and ITO-glass. It was determined that PPy/FMWCNT composites deposited on either electrode using potentiostatic deposition exhibited redox peaks. This redox behavior was not observed when the galvanostatic deposition was employed. HCNT/Polyaniline (PAn) composites were prepared by either casting a film from a solution of HCNT and PAn in 1,2-Dichlorobenzene, or by casting a film of PAn onto an existing HCNT mat. The latter exhibited the highest conductivity. The actuation behavior of these CNT composites was investigated and it was determined that the PAn component contributes to the actuation strain while the HCNT component contributes to Young’s modulus. The combination of the HCNT (with their mechanical properties) and PAn (with its actuator behavior) offers and attractive route not only to reinforce the polymer film but also to introduce new electronic properties based on morphological modifications or electronic interactions between the two components giving a robust blend of optimum properties. These results open the door for these composites to be used in a variety of applications that require a combination of the above characteristics such as mechanically reinforced actuator devices, robotics, optical fiber switches, prosthetic devices, and anti-vibration systems. In addition, PPy with a range of dopant anions was electrodeposited galvanostatically, potentiostatically, and potentiodynamically on the surface of four different carbon electrodes, RCNT mat (unannealed), RCNT mat (annealed), glassy carbon, and carbon foil. It was found that the method of electrodeposition was crucial to the electroactivity of the deposited polymers, particularly when deposited onto a RCNT mat due to the different interaction between the deposited polymer and the RCNT mat. Finally, HCNT/SDS, HCNT/PMAS, and HCNT/DNA fibers were prepared using the Particle Coagulating Spinning method (PCS). The annealing process resulted in a dramatic increase in conductivity of up to 2600 times higher compared to the unannealed fibers. However, the annealing process did not play any role in keeping the fibers together or modifying the alignment of the carbon nanotubes ropes within the fibers. The HCNT/DNA fibers, with their biocompatibility, high conductivity, and good mechanical properties can be used as artificial muscles, bioelectronic sensors, or even as platforms to support the growth of nerve cells. This thesis delineates the methods of successful production of solid sate CNT mats and fibers, utilizing traditional polymeric and more novel multi- functional dispersant materials. Thereby, providing a series of new framework for which future device structures can be fabricated.
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Botelho, Edson Cocchieri. "Processamento e caracterização de compósitos de resina fenólica com nanotubos de carbono com aplicações aeroespaciais /." Guaratinguetá : [s.n.], 2011. http://hdl.handle.net/11449/106719.

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Banca: Luis Rogério de Oliveira Hein
Banca: Waldek Wladimir BaseFilho
Banca: Ailton de Souza Gomes
Banca: Durval Rodrigues Junior
Banca: Maysa Furlan
Resumo: Este trabalho de pesquisa consistiu na obtenção de compósitos nanoestruturados utilizando matrizes poliméricas termorrígidas e nanotubos de carbono (CNT) e posterior caracterização de suas propriedades mecânicas, térmicas, elétricas, reológicas e demais características físico-químicas para aplicações aeroespaciais. As atividades experimentais para a realização deste trabalho foram, em sua maioria, conduzidas na Alemanha. Durante o desenvolvimento deste trabalho de pesquisa, foi possível entender melhor como deve ser realizada a purificação, funcionalização e dispersão de CNT em compósitos poliméricos. Desta forma, CNT foram caracterizados e utilizados como reforços para a obtenção de compósitos nanoestruturados em matrizes termorrígidas (resina fenólica). Estes compósitos foram processados, por meio de cura em autoclave e avaliados com relação aos seus desempenhos mecânicos, físico-químicos e morfológicos. Duas metodologias foram utilizadas para permitir a dispersão dos CNT: dispersão em solução aquosa e por calandragem (TRC). Os resultados obtidos mostram que a metodologia mais adequada para dispersar os CNT em resina fenólica é a partir do processo por calandragem e que teores superiores a 0,5% em massa de CNT não resultam em melhorias significativas quanto aos desempenhos viscoelástico, térmico, elétrico e mecânico destes compósitos. Ainda, a partir dos ensaios reológicos e elétricos, foi observado que teores abaixo de 0,2% em massa de CNT já são suficientes para promover a percolação dos CNT na resina fenólica, gerando mudanças significativas no comportamento físico-químico do compósito nanoestruturado. A partir deste trabalho de pesquisa... (Resumo completo, clicar acesso eletrônico abaixo)
Abstract: This researcher work concerning about the nanostructured composite obtaining by using thermoset polymeric matrix and carbon nanotubes and posterior characterization of their mechanical, thermal, electrical, rheological and others physical-chemical properties for aerospace application. The experimental activities in order to perform this work, in its majority, have been done in Germany. During the development of this researcher work, it was possible to understand better how should be done the purification, functionalization and dispersion of CNT into polymeric composites. This way, CNT were characterized and used as reinforcement in order to obtain nanostructured composite materials in thermoset matrix (phenolic resin). These composites were processed by using autoclave cure processing and they were evaluated concerning about its mechanical, physical-chemical and morphological behavior. Two methodologies were used in order to allow the CNT dispersion: in aqueous solution and in three roll calender (TRC). The obtained results show that the TRC methodology is more adequate in order to disperse the CNT reinforcement and that the content higher than 0.5wt%CNT not result in significant gain in viscoelastic, thermal, rheological and electrical properties in these composites. Still, from the rheological and electrical tests, it was observed that loads below than 0.2wt%CNT are enough to promote the CNT percolation in phenolic resin, generating significant changes in physical-chemical properties of nanostructured composites. From this researcher work... (Complete abstract click electronic access below)
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Books on the topic "Nanotubes. Nanostructured materials. Carbon composites"

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Basiuk, Vladimir A., and Elena V. Basiuk. Chemistry of carbon nanotubes. Stevenson Ranch, Calif: American Scientific Publishers, 2008.

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Rao, Bakshi Srinivasa, and Lahiri Debrupa, eds. Carbon nanotubes: Reinforced metal matrix composites. Boca Raton: CRC Press, 2011.

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Mahler, Erne, and Detlev Seiler. Carbon nanotube and nanocomposite research. Hauppauge, N.Y: Nova Science Publishers, 2011.

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Carbon nanotubes: New research. New York: Nova Science Publishers, 2009.

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Botti, Sabina. Physical properties of carbon nanotubes. Kerala, India: Transworld Research Network, 2007.

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Yellampalli, Siva. Carbon nanotubes: Synthesis, characterization, applications. Rijeka: InTech, 2011.

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Carbon nanotubes: Synthesis and properties. Hauppauge, New York: Nova Science Publishers, Inc., 2011.

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Haghi, A. K. Carbon nanotubes: Properties, performance and applications. Hauppauge, N.Y: Nova Science Publishers, 2012.

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Blank, Vladimir. Carbon nanotubes and related structures 2008. Kerala, India: Research Signpost, 2008.

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Reich, Stefanie. Carbon nanotubes: Basic concepts and physical properties. Weinheim: Wiley-VCH, 2004.

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Book chapters on the topic "Nanotubes. Nanostructured materials. Carbon composites"

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Kharitonov, A. P., A. P. Kharitonov, A. G. Tkachev, A. N. Blohin, I. V. Burakova, A. E. Burakov, A. E. Kucherova, and A. A. Maksimkin. "Nanostructured Polymer Composites with Modified Carbon Nanotubes." In Handbook of Composites from Renewable Materials, 381–408. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2017. http://dx.doi.org/10.1002/9781119441632.ch137.

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Hu, Jianbao, Shaoming Donga, Xiangyu Zhang, Bo Lu, Zhihui Hu, Jinshan Yang, Qinggang Li, and Bin Wu. "In-Situ Growth of Carbon Nanotubes in Three Dimensional Needle-Punched Carbon Fabrics and Hybrid Enhancement to C/SiC Composites." In Nanostructured Materials and Nanotechnology VI, 15–19. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2012. http://dx.doi.org/10.1002/9781118217511.ch2.

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Li, Hao, Abhishek Kothari, and Brian W. Sheldon. "Synthesis of Carbon Nanotubes and Silicon Carbide Nanofibers as Composite Reinforcing Materials." In Synthesis and Processing of Nanostructured Materials: Ceramic Engineering and Science Proceedings, Volume 27, Issue 8, 41–48. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2008. http://dx.doi.org/10.1002/9780470291375.ch5.

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Ucar, Nuray, and Nuray Kizildag. "Nanocomposite Fibers with Carbon Nanotubes, Silver, and Polyaniline." In Advances in Nanostructured Composites, 315–34. Boca ERaton, FL : CRC Press, Taylor & Francis Group, 2018. | Series: A science publishers book | Series: Advances in nanostructured composites ; volume 1: CRC Press, 2019. http://dx.doi.org/10.1201/9781315118406-14.

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Marichy, Catherine, Andrea Pucci, Marc-Georg Willinger, and Nicola Pinna. "Coating of Carbon Nanotubes." In Atomic Layer Deposition of Nanostructured Materials, 327–43. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2012. http://dx.doi.org/10.1002/9783527639915.ch14.

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Baibarac, M., I. Baltog, and S. Lefrant. "Composites Based on Conducting Polymers and Carbon Nanotubes." In Nanostructured Conductive Polymers, 209–60. Chichester, UK: John Wiley & Sons, Ltd, 2010. http://dx.doi.org/10.1002/9780470661338.ch5.

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Damnjanović, M. "Carbon Nanotubes: From Symmetry to Applications." In Nanostructured Materials and Their Applications, 47–57. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-22227-6_3.

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Shofner, Meisha L. "Hierarchical Composites Containing Carbon Nanotubes." In Hybrid and Hierarchical Composite Materials, 319–56. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-12868-9_9.

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Ameta, Rakshit, Neha Kapoor, Bhavya Pathak, Jayesh Bhatt, and Suresh C. Ameta. "Carbon Nanotube Composites As Photocatalytic Materials." In Carbon Nanotubes and Nanoparticles, 39–64. Toronto; New Jersey : Apple Academic Press, 2019.: Apple Academic Press, 2019. http://dx.doi.org/10.1201/9780429463877-3.

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Kopp Alves, Annelise, Carlos P. Bergmann, and Felipe Amorim Berutti. "CCVD Synthesis of Carbon Nanotubes." In Novel Synthesis and Characterization of Nanostructured Materials, 43–60. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-41275-2_5.

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Conference papers on the topic "Nanotubes. Nanostructured materials. Carbon composites"

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Delpeux, S., K. Méténier, R. Benoit, F. Vivet, L. Boufendi, S. Bonnamy, and F. Béguin. "Functionalisation of carbon nanotubes for composites." In ELECTRONIC PROPERTIES OF NOVEL MATERIALS--SCIENCE AND TECHNOLOGY OF MOLECULAR NANOSTRUCTURES. ASCE, 1999. http://dx.doi.org/10.1063/1.59830.

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Tiano, Thomas, Margaret Roylance, Benjamin Harrison, and Richard Czerw. "Intralaminar Reinforcement for Biomimetic Toughening of Bismaleimide Composites Using Nanostructured Materials." In ASME 2005 International Mechanical Engineering Congress and Exposition. ASMEDC, 2005. http://dx.doi.org/10.1115/imece2005-81689.

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Many conventional composite materials are composed of multiple layers of continuous fiber reinforced resin produced by lamination of b-staged prepreg and subsequent cure. These materials exhibit very high strength and stiffness in the plane, dominated by the properties of the fibers. The Achilles heel of such composites is the interlaminar strength, which is dependent on the strength of the unreinforced resin, often leading to failure by delamination under load. Current methods for increasing the interlaminar shear strength of composites consist of inserting translaminar reinforcement fibers through the entire thickness of a laminated composite, such as z-pin technology developed by Foster-Miller [1]. While effective, this technique adds several processing steps, including ultrasonic insertion of the z-pins into the laminate, subsequently causing a significant cost increase to laminated composites. Described in this paper is a process utilizing single-walled carbon nanotubes (SWNTs) and vapor grown carbon nanofibers as reinforcing elements promoting interlaminar shear strength and toughness in carbon fiber/bismaleimide (BMI) resin composites. The resulting composites mimic the natural reinforcing mechanism utilized in insect cuticles. Three different methods of increasing the affinity of these carbon nanofillers for the BMI matrix were explored. The mechanical properties of these composites were assessed using end notch flexure testing. The results indicated that including nanofiller at the laminae interface could increase the interlaminar shear strength of carbon fiber/BMI composites by up to 58%. SEM micrographs revealed that the nanofiller successfully bridged the laminae of the composite, thus biomimicking the insect cuticle. Composite fabrication techniques developed on this program would have a wide variety of applications in space and aerospace structures including leading and trailing edges of aircraft wings.
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Stéphan, C., T. P. Nguyen, S. Curran, B. Lahr, and S. Lefrant. "Characterization of multiwalled carbon nanotubes-PMMA composites." In ELECTRONIC PROPERTIES OF NOVEL MATERIALS--SCIENCE AND TECHNOLOGY OF MOLECULAR NANOSTRUCTURES. ASCE, 1999. http://dx.doi.org/10.1063/1.59829.

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Stéphan, C. "Electrical properties of singlewalled carbon nanotubes-PMMA composites." In The 14th international winterschool on electronic properties of novel materials - molecular nanostructures. AIP, 2000. http://dx.doi.org/10.1063/1.1342534.

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Bonnet, Pierre. "Synthesis And Characterization of Carbon Nanotubes/Amylose Composites." In ELECTRIC PROPERTIES OF SYNTHETIC NANOSTRUCTURES: XVII International Winterschool/Euroconference on Electronic Properties of Novel Materials. AIP, 2004. http://dx.doi.org/10.1063/1.1812130.

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Bellucci, S., F. Micciulla, C. Balasubramanian, A. Grilli, and G. Rinaldi. "Studies of Carbon Nanotube Based Composites for Aerospace Applications." In CANEUS 2006: MNT for Aerospace Applications. ASMEDC, 2006. http://dx.doi.org/10.1115/caneus2006-11001.

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Carbon nanotubes are being widely studied for various applications ranging from medical to electronics and also optical devices. They are also being studied for the suitability and applications in aerospace and aeronautical field. A useful application in aerospace that we are studying is the improvement of electrical properties of composites made from carbon nanotubes and epoxy resin. Towards this end, we have studied the resistivity of composite materials with varying percentages of carbon nanotubes (CNT) added to the epoxy resin. Carbon nanotubes were synthesized by thermal arc plasma process after optimization of the synthesis parameters. These samples were then analysed by electron microscopes like scanning electron and transmission electron microscopes (SEM and TEM), in order to establish the morphology of the nanostructures. Composites of epoxy resin with curing agent as well as a mixture of graphite and carbon nanotubes were prepared with varying proportions of the mixture. The electrical resistivity of the material was studied under varying pressure and voltage conditions. The result of these studies yields interesting features which are useful in choosing the ideal composition and ratio of the composite material for use in shielding of electrical circuits of space vehicles from radiations of the outer space.
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Alavijeh, Elham Zamani, Saeed Kokhaei, and Kamran Dehghani. "Fabrication and mechanical properties of aluminum composite reinforced with functionalized carbon nanotubes." In 6TH INTERNATIONAL BIENNIAL CONFERENCE ON ULTRAFINE GRAINED AND NANOSTRUCTURED MATERIALS: (UFGNSM2017). Author(s), 2018. http://dx.doi.org/10.1063/1.5018973.

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Raffaelle, R. P., B. Landi, T. Gennett, R. S. Morris, B. Dixon, and P. Lamarre. "Fuel Cell Applications of Single Wall Carbon Nanotubes." In ASME 2003 1st International Conference on Fuel Cell Science, Engineering and Technology. ASMEDC, 2003. http://dx.doi.org/10.1115/fuelcell2003-1708.

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Novel carbon materials with nanometer dimensions are of potentially significant importance for a number of advanced technological applications. Currently, considerable interest exists in the possible applications of single wall carbon nanotubes (SWNTs) to proton exchange membrane (PEM) fuel cells. Proposed uses include as anode materials in both hydrogen and direct methanol fuel cells, solid polymer electrolyte additives, active cathode materials and bipolar plate interconnects. One of the desirable attributes afforded by the use of SWNTs in fuel cell applications stems from a combination of their extremely high electrical conductivity and large aspect ratios which results in a low weight percent for the electrical percolation threshold. This conductivity combined with the outstanding catalytic surface area offered by these nanostructured materials makes them a potentially outstanding active material for PEM electrodes. In addition, the high thermal conductivity, enhanced mechanical properties and corrosion resistance of polymer-SWNT composites may play a large role in developing new fuel cell designs such as thin-film microelectronic fuel cells. We will review the current applications involving SWNTs in PEM fuel cells and report on the recent work in the Nanopower Research Lab at RIT and it partners on utilizing high purity SWNT’s in microelectronic fuel cells.
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Hasi, F. "Raman Spectroscopy Of Boron Nitride Nanotubes And Boron Nitride — Carbon Composites." In ELECTRONIC PROPERTIES OF NOVEL NANOSTRUCTURES: XIX International Winterschool/Euroconference on Electronic Properties of Novel Materials. AIP, 2005. http://dx.doi.org/10.1063/1.2103883.

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Liao, G. Y., S. Geier, T. Mahrholz, P. Wierach, and M. Wiedemann. "Temperature Influence on Electrical Properties of Carbon Nanotubes Modified Solid Electrolyte-Based Structural Supercapacitor." In ASME 2017 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/smasis2017-3908.

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In the present work, we report on structural supercapacitors which are based on NASICON-type solid electrolyte Li1.4Al0.4Ti1.6(PO4)3 (LATP). The nanostructured electrodes incorporate single-wall carbon nanotubes (SWCNTs) mixed with the LATP electrolyte. The complete energy storage devices are manufactured in a sandwich structure consisting of two nanostructured electrode layers which are separated by a pure LATP layer. The as-prepared specimens are embedded in composite materials with Airstone 880/886H epoxy resin as matrix. Their electrical properties are characterized by electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV). At ambient temperature, the addition of 6.5 wt. % SWCNTs results in a distinct improvement by reducing the total resistance of the embedded devices and enhances the capacitance from 0.025 mF g−1 to 3.160 mF g−1 at a scan rate of 5 mV s−1. Electrical measurements of two types of specimens are then applied under different temperatures from ambient temperature to 80 °C. It is observed that the equivalent series resistance (ESR) of device with SWCNTs decreases greatly and capacitance increases comparing with the device without SWCNTs. As a conclusion, the structural supercapacitors acquire excellent performance through high efficient double layer effects realized by nanostructured electrode/electrolyte interphase (large surface electrode areas).
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