Relevant bibliographies by topics / Nanotubes hybrides

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Academic literature on the topic 'Nanotubes hybrides'

Author: Grafiati
Published: 4 June 2021
Last updated: 18 February 2022

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Journal articles on the topic "Nanotubes hybrides"

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Gerasimenko, Alexander Yu, Artem V. Kuksin, Yury P. Shaman, et al. "Electrically Conductive Networks from Hybrids of Carbon Nanotubes and Graphene Created by Laser Radiation." Nanomaterials 11, no. 8 (2021): 1875. http://dx.doi.org/10.3390/nano11081875.

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A technology for the formation of electrically conductive nanostructures from single-walled carbon nanotubes (SWCNT), multi-walled carbon nanotubes (MWCNT), and their hybrids with reduced graphene oxide (rGO) on Si substrate has been developed. Under the action of single pulses of laser irradiation, nanowelding of SWCNT and MWCNT nanotubes with graphene sheets was obtained. Dependences of electromagnetic wave absorption by films of short and long nanotubes with subnanometer and nanometer diameters on wavelength are calculated. It was determined from dependences that absorption maxima of various types of nanotubes are in the wavelength region of about 266 nm. It was found that contact between nanotube and graphene was formed in time up to 400 fs. Formation of networks of SWCNT/MWCNT and their hybrids with rGO at threshold energy densities of 0.3/0.5 J/cm2 is shown. With an increase in energy density above the threshold value, formation of amorphous carbon nanoinclusions on the surface of nanotubes was demonstrated. For all films, except the MWCNT film, an increase in defectiveness after laser irradiation was obtained, which is associated with appearance of C–C bonds with neighboring nanotubes or graphene sheets. CNTs played the role of bridges connecting graphene sheets. Laser-synthesized hybrid nanostructures demonstrated the highest hardness compared to pure nanotubes. Maximum hardness (52.7 GPa) was obtained for MWCNT/rGO topology. Regularity of an increase in electrical conductivity of nanostructures after laser irradiation has been established for films made of all nanomaterials. Hybrid structures of nanotubes and graphene sheets have the highest electrical conductivity compared to networks of pure nanotubes. Maximum electrical conductivity was obtained for MWCNT/rGO hybrid structure (~22.6 kS/m). Networks of nanotubes and CNT/rGO hybrids can be used to form strong electrically conductive interconnections in nanoelectronics, as well as to create components for flexible electronics and bioelectronics, including intelligent wearable devices (IWDs).
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Lobiak, Egor V., Lyubov G. Bulusheva, Ekaterina O. Fedorovskaya, et al. "One-step chemical vapor deposition synthesis and supercapacitor performance of nitrogen-doped porous carbon–carbon nanotube hybrids." Beilstein Journal of Nanotechnology 8 (December 12, 2017): 2669–79. http://dx.doi.org/10.3762/bjnano.8.267.

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Novel nitrogen-doped carbon hybrid materials consisting of multiwalled nanotubes and porous graphitic layers have been produced by chemical vapor deposition over magnesium-oxide-supported metal catalysts. CN x nanotubes were grown on Co/Mo, Ni/Mo, or Fe/Mo alloy nanoparticles, and MgO grains served as a template for the porous carbon. The simultaneous formation of morphologically different carbon structures was due to the slow activation of catalysts for the nanotube growth in a carbon-containing gas environment. An analysis of the obtained products by means of transmission electron microscopy, thermogravimetry and X-ray photoelectron spectroscopy methods revealed that the catalyst's composition influences the nanotube/porous carbon ratio and concentration of incorporated nitrogen. The hybrid materials were tested as electrodes in a 1M H2SO4 electrolyte and the best performance was found for a nitrogen-enriched material produced using the Fe/Mo catalyst. From the electrochemical impedance spectroscopy data, it was concluded that the nitrogen doping reduces the resistance at the carbon surface/electrolyte interface and the nanotubes permeating the porous carbon provide fast charge transport in the cell.
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Khantimerov, S. M., E. F. Kukovitsky, N. A. Sainov, and N. M. Suleimanov. "Fuel Cell Electrodes Based on Carbon Nanotube/Metallic Nanoparticles Hybrids Formed on Porous Stainless Steel Pellets." International Journal of Chemical Engineering 2013 (2013): 1–4. http://dx.doi.org/10.1155/2013/157098.

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The preparation of carbon nanotube/metallic particle hybrids using pressed porous stainless steel pellets as a substrate is described. The catalytic growth of carbon nanotubes was carried out by CVD on a nickel catalyst obtained by impregnation of pellets with a highly dispersive colloidal solution of nickel acetate tetrahydrate in ethanol. Granular polyethylene was used as the carbon source. Metallic particles were deposited by thermal evaporation of Pt and Ag using pellets with grown carbon nanotubes as a base. The use of such composites as fuel cell electrodes is discussed.
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Karachevtsev, M. V., O. S. Lytvyn, S. G. Stepanian, V. S. Leontiev, L. Adamowicz, and V. A. Karachevtsev. "SWNT-DNA and SWNT-polyC Hybrids: AFM Study and Computer Modeling." Journal of Nanoscience and Nanotechnology 8, no. 3 (2008): 1473–80. http://dx.doi.org/10.1166/jnn.2008.18214.

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Hybrids of carbon single-walled nanotubes (SWNT) with fragmented single or double-stranded DNA (fss- or fds-DNA) or polyC were studied by Atom Force Microscopy (AFM) and computer modeling. It was found that fragments of the polymer wrap in several layers around the nanotube, forming a strand-like spindle. In contrast to the fss-DNA, the fds-DNA also forms compact structures near the tube surface due to the formation of self-assembly structures consisting of a few DNA fragments. The hybrids of SWNT with wrapped single-, double- or triple strands of the biopolymer were simulated, and it was shown that such structures are stable. To explain the reason of multi-layer polymeric coating of the nanotube surface, the energy of the intermolecular interactions between different components of polyC was calculated at the MP2/6-31++G** level as well as the interaction energy in the SWNT-cytosine complex.
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Hasobe, Taku, and Hayato Sakai. "Molecular nanoarchitectures composed of porphyrins and carbon nanomaterials for light energy conversion." Journal of Porphyrins and Phthalocyanines 15, no. 05n06 (2011): 301–11. http://dx.doi.org/10.1142/s1088424611003318.

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In this review, we report the recent advances in the construction of composite molecular nanoarchitectures of porphyrins and nanoscale carbon materials such carbon nanotubes (CNT), graphenes and polycyclic aromatic hydrocarbons (PAH) for photoinduced electron transfer and light energy conversion. First, we state novel single-wall carbon nanotubes (SWCNT)-driven aggregation of protonated porphyrins to produce supramolecular assemblies in the form of macroscopic bundles. Then, photoinduced electron transfer in self-assembled single-walled carbon nanotube (SWCNT)/zinc porphyrin (ZnP) hybrids utilizing (7,6)- and (6,5)-enriched SWCNTs having different band gaps is reported. Further, we discuss the structural and photoelectrochemical properties of porphyrin-based molecular assemblies of other carbon materials such as stacked-cup carbon nanotubes (SCCNT), carbon nanohorns (CNH) and graphenes. Finally, novel supramolecular patterning formation composed of triphenylene core-centered porphyrin hexamers for electronics is discussed.
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IMANI YENGEJEH, SADEGH, SEYEDEH ALIEH KAZEMI, and ANDREAS ÖCHSNER. "ON THE INFLUENCE OF ATOMIC MODIFICATIONS ON THE STRUCTURAL STABILITY OF CARBON NANOTUBE HYBRIDS: NUMERICAL INVESTIGATION." International Journal of Applied Mechanics 06, no. 06 (2014): 1450077. http://dx.doi.org/10.1142/s175882511450077x.

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Connected carbon nanotubes (CNTs) with parallel longitudinal axes and with bending angles were simulated by a commercial finite element package and their buckling behavior was investigated by performing several computational examinations. In addition, the effect of defects on the structural stability of these heterojunctions was analyzed. For this purpose, two different nanotube hybrids (straight and kink heterojunction) were constructed in their perfect forms. In the second phase, three most likely atomic defects, i.e., impurities (doping with Si atoms), vacant sites (carbon vacancy) and introduced perturbations of the ideal geometry in different amounts to the perfect models, were simulated. To conclude our study, the buckling behavior of imperfect heterojunctions was numerically evaluated and compared with the behavior of the perfect ones. It was concluded that the existence of any type of defects in the configuration of nanotube hybrids leads to a lower critical load and as a result, lower buckling properties. This study provides a better insight into the prediction of straight and kink heterojunction CNTs behavior.
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NEOCLEUS, S., S. W. PATTINSON, A. M. MOISALA MOTTA, A. H. WINDLE, and D. EDER. "HIERARCHICAL CARBON NANOTUBE-INORGANIC HYBRID STRUCTURES INVOLVING CNT ARRAYS AND CNT FIBERS." Functional Materials Letters 04, no. 01 (2011): 83–89. http://dx.doi.org/10.1142/s1793604711001609.

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Carbon nanotube-inorganic hybrid materials have stimulated a new boost in CNT research as a new class of multifunctional materials with properties distinct from the well-known CNT composites. Synergistic effects based on interfacial charge and heat transfer processes commend these hybrids for use in photocatalysis, gas sensors and in electrochemical devices. A major challenge is the synthesis of hybrids with hierarchical architectures and controlled interfaces. Common wet-chemical techniques have the major drawback that the CNT array typically collapses upon drying due to stresses imposed by the surface tension of the solvent. In this work, we synthesized hierarchical hybrids with coherent 3D architectures using unique CNT fibers, based on the "Cambridge process" as well as vertical arrays of CNTs ("carpets"). We demonstrate that separating the liquid reactants from the CNT array is key to preserving the hybrid's architecture. In addition, we show that the presence of benzyl alcohol as a linking agent is beneficial to maximizing the interfacial area in TiO 2-coated CNT fibers.
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Fischer, Christian E., Alexander Raith, János Mink, Gabriele Raudaschl-Sieber, Mirza Cokoja, and Fritz E. Kühn. "Organic–inorganic nanotube hybrids: Organosilica-nanotubes containing ethane, ethylene and acetylene groups." Journal of Organometallic Chemistry 696, no. 17 (2011): 2910–17. http://dx.doi.org/10.1016/j.jorganchem.2011.03.031.

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Singh, Prabhpreet, Francesca Maria Toma, Jitendra Kumar, et al. "Carbon Nanotube-Nucleobase Hybrids: Nanorings from Uracil-Modified Single-Walled Carbon Nanotubes." Chemistry - A European Journal 17, no. 24 (2011): 6772–80. http://dx.doi.org/10.1002/chem.201100312.

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Choi, Jong Won, Seul Ki Youn, and Hyung Gyu Park. "Carbon Micronymphaea: Graphene on Vertically Aligned Carbon Nanotubes." Journal of Nanomaterials 2013 (2013): 1–7. http://dx.doi.org/10.1155/2013/734686.

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This paper describes the morphology of carbon nanomaterials such as carbon nanotube (CNT), graphene, and their hybrid structure under various operating conditions during a one-step synthesisviaplasma-enhanced chemical vapor deposition (PECVD). We focus on the synthetic aspects of carbon hybrid material composed of heteroepitaxially grown graphene on top of a vertical array of carbon nanotubes, called carbon micronymphaea. We characterize the structural features of this unique nanocomposite by uses of electron microscopy and micro-Raman spectroscopy. We observe carbon nanofibers, poorly aligned and well-aligned vertical arrays of CNT sequentially as the growth temperature increases, while we always discover the carbon hybrids, called carbon micronymphaea, at specific cooling rate of 15°C/s, which is optimal for the carbon precipitation from the Ni nanoparticles in this study. We expect one-pot synthesized graphene-on-nanotube hybrid structure poses great potential for applications that demand ultrahigh surface-to-volume ratios with intact graphitic nature and directional electronic and thermal transports.
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Dissertations / Theses on the topic "Nanotubes hybrides"

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Bounour-Bouzamouche, Wafa. "Matériaux hybrides nanotubes de carbone/ferromagnétiques : élaboration et propriétés magnétiques statiques." Thesis, Sorbonne Paris Cité, 2016. http://www.theses.fr/2016USPCD095/document.

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Les matériaux hybrides nanotubes de carbone remplis par des matériaux ferromagnétiques (NTCFM) présentent un fort potentiel pour des applications en électronique de spin. Leurs propriétés magnétiques dépendent fortement de la qualité de leur synthèse : densité, orientation et efficacité de remplissage. Deux méthodes d’élaboration des (NTC-FM) ont été utilisées : i) synthèse ex-situ après ouverture mécanique des nanotubes élaborés par arc électrique et in-situ pendant la synthèse par arc électrique, ii) synthèse par dépôt vapeur chimique assisté par plasma (PECVD) en présence de catalyseurs Co et Co/Pd. Les deux approches de confinement des nanotubes de carbone avec des métaux ferromagnétiques ont été comparées. La première méthode de synthèse des nanotubes hybrides a montré que l’approche par arc électrique in-situ est plus efficace surtout par l’ajout d’un promoteur comme l’yttrium (Y) et le soufre (S). Les différentes proportions catalytiques au cours de la synthèse ont été variées et leur influence sur la production des nanotubes hybrides étudiée. La qualité et la quantité des nanotubes obtenus ainsi que les rendements disponibles au cours de la synthèse ont été améliorés. La réponse magnétique est également meilleure. La synthèse des nanotubes hybrides par PECVD a révélé que l’adjonction d’une couche de palladium comme catalyseur avec le cobalt conduit à une nette amélioration de la densité, du remplissage et de l’alignement des nanotubes. Les mesures magnétiques ont mis en évidence la contribution d’une anisotropie de forme que l’on peut associer à une meilleure orientation géométrique des nanotubes par rapport au substrat<br>Hybrid materials as carbon nanotubes filled with ferromagnetic materials (FMCNT) have great potential for spintronic applications. Their magnetic properties strongly depend on their density,orientation and filling efficiency. Two preparation methods of (FMNTC) were used: i) ex-situ synthesis where mechanical opening of the nanotubes produced by electrical arc is first achieved and in-situ during the synthesis by electrical arc discharge, ii) synthesis by chemical vapor deposition enhanced by plasma (PECVD) in the presence of cobalt Co and Co / Pd catalysts. Our results showed that the arc in-situ approach is more effective especially with the addition of a filling promoter such as yttrium (Y) and sulfur (S). Different proportions of catalyst were varied and their influence on the yield of hybrid nanotubes studied. The quality and quantity of obtained nanotubes as well as their yields and magnetic properties were improved. The PECVD synthesis revealed that the addition of a thin layer of palladium (~6 nm) as a co catalyst with the cobalt leads to a significant improvement inthe density of the filler and the alignment of the nanotubes. Magnetic measurements thereby demonstrated the contribution of a shape anisotropy that can be associated with a better geometric orientation of the nanotubes to the substrate
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Ben, Sghaier Asma. "Hybrides polymer materials organic/inorganic nanoparticule." Thesis, Paris Est, 2018. http://www.theses.fr/2018PESC1163.

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La chimie d'interface du diazonium a progressé au cours des dernières années et s'est pratiquement impliquée dans tous les domaines de la science et technologie des matériaux. L’utilisation des sels de diazonium est justifiée par le fait qu’ils adhèrent aux surfaces avec de fortes énergies de liaison, en particulier sur le carbone sp², ce qui en fait d’excellents agents de couplage pour les polymères aux surfaces. Dans ce contexte, nous avons travaillé sur deux types de nanohybrides de nanotubes de carbone (NTC) : NTC-polytriazole (NTC-PTAz) et NTC-colorant. Le nanohybride NTC-PTAz a été synthétisé par polymérisation « click » en surface. Pour ce faire, les NTCs ont été greffés de groupes 4-azidophényle à partir du sel de diazonium correspondant. Le NTC modifié (NTC-N3) a servi de support pour une polymérisation confinée en surface de type polyaddition générant ainsi le nanohybride NTC-PTAz. Ce matériau a été caractérisé par ATG, XPS, IR et Raman. Ses applications potentielles sont dans le développent d’adsorbants de métaux lourds, l’immobilisation de nanocatalyseurs ou pour le stockage des gaz. La seconde partie de la thèse est plus étoffée et porte sur les nanotubes de carbone greffés de colorants diazotés Rouge Neutre (NR), Azure A (AA) et Rouge Congo (CR). L’analyse fine de ces matériaux a révélé une très forte adhésion des colorants aux NTCs et les couches superficielles ont des épaisseurs de 2 à 6 nm, sont homogènes et continues. Les NTC-colorant ont été incorporés dans des matrices élastomères de type EVA pour la réalisation d’actionneurs opto-thermiques implantés dans des pads pour non-voyant. Dans les matrices EVA, les NTCs greffés de colorants servent à capter la lumière et induire un changement de forme dans le pad qui soit palpable par le non voyant (250 µm). Les matrices EVA renforcées de nos nanotubes greffés de colorants ont été réalisées et testées par analyse mécanique dynamique. Les composites NTC/colorant-EVA sont flexibles et prometteurs pour le développement de nouveaux types des pads tactiles pour les non-voyants. Les nanohybrides NTC-NR ont servi comme capteurs chémo-résistifs pour la reconnaissance moléculaire de l’acétone.Dans une dernière application, le nanohybride CNT-CR a été étudié en tant qu’électrocatalyseur pour l’oxydation directe du méthanol. Des résultats intéressants ont été obtenus avec ces nanohybrides mais des améliorations significatives (rapport 3) des propriétés électrocatalytiques ont été obtenues avec des CNT-CR décorés avec des nanoparticules d'or. Le système électrocatalytique nouvellement conçu pourrait être considéré pour différentes applications prometteuses, notamment les capteurs, les biocapteurs, les catalyseurs hétérogènes pour les piles à combustible. Pour résumer, les nanohybrides à base de CNT nouvellement conçus présentent des performances uniques attribuées à la polyvalence de la chimie d'interface du diazonium pour la fixation efficace de couches moléculaires et macromoléculaires fonctionnelles. Les nanohybrides novateurs servent de blocs de construction pour la conception de matériaux nanocomposites à hautes performances potentiellement utiles dans les nouveaux défis socio-économiques tels que l’environnement, la biomédecine et l’énergie<br>Diazonium interface chemistry has progressed over the last few years and practically involved in all areas of materials science and engineering. The rationale for employing diazonium salts is that they attach to surfaces with remarkable bond energies, particularly on sp² carbon materials, making them an ideal coupling agent for polymers to surfaces In this context, novel CNT-polytriazole (CNT-PTAz) and CNT-dye nanohybrids were designed and thoroughly characterized. First, CNT-PTAz nanohybrid was prepared by click polymerization: multiwalled carbon nanotubes (CNTs) were modified with azidophenyl groups (CNT-N3) from 4-azidobenzenediazonium precursor and served as nanoscale platform for the surface confined polyaddition. The CNT-PTAz nanohybrid was characterized by TGA, XPS, IR, and Raman. The robust CNT-PTAz is robust and has potential in developing heavy metal adsorbents, nanosupport for catalysts or for gas storage. In the second major part, we grafted CNT with diazotized Neutral red (NR), Azure A (AA) and Congo Red (CR) dyes by simple, spontaneous reaction of the diazonium salts and CNTs in water, at RT. A thorough investigation of the nanohybrids showed that the adhesion is strong (CNT-dye C-C bond energy higher than 150 kJ/mol), and the layer is uniform. These nanohybrids further served to reinforce ethylene-vinyl acetate (EVA) an elastomeric matrix. The reinforced matrix is flexible and serves as optothermal actuators where the grafted dye catches the light to induce mechanical changes in the matrix monitored by dynamic mechanical analysis. CNT/dye-reinforced EVA is a promising flexible composite for developing new types of visual-aid tablet for visually impaired people. The versatile CNT-dye nanohybrids are also unique chemiresistive gas sensors for the molecular recognition of acetone vapours. In a final application, CNT-CR nanohybrid was investigated as an electrocatalyst for the Direct Oxidation of Methanol. Interesting results were obtained with these nanohybrids but significant improvements (3-fold) of the electrocatalytic properties were achieved with CNT-CR decorated with gold nanoparticles. The newly designed electrocatalytic system could be regarded for different promising applications most likely as for sensors, biosensors, heterogeneous catalysts for fuel cells and for nanotechnology To summarize, newly designed CNT-based nanohybrids have unique performances ascribed to the versatility of the diazonium interface chemistry in efficiently attaching functional molecular and macromolecular layers. The novel nanohybrids serve as building blocks for designing high performance nanocomposite materials relevant to challenging timely social economic issues, namely environment, biomedicine and energy
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Cleuziou, Jean-Pierre. "Propriétés de transport électronique de nanotubes de carbone: des nanotubes hybrides au nano-SQUID." Phd thesis, Université Paul Sabatier - Toulouse III, 2007. http://tel.archives-ouvertes.fr/tel-00342549.

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L'électronique moléculaire et la spintronique moléculaire sont deux domaines émergeant de la nanophysique, prometteurs pour réaliser de nouveaux types de dispositifs utiles tant pour le stockage d'information que pour l'information quantique. Ce travail de thèse a pour objet de contribuer à ces deux domaines de recherche par la réalisation de jonctions moléculaires à base de nanotubes de carbone, faisant intervenir des nanostructures magnétiques. Nous avons choisi deux approches: (i) le transport électronique à travers des nanotubes de carbone remplis de matériaux magnétiques (nanotubes hybrides) et (ii) le développement du nano-SQUID composé de jonctions supraconductrices à nanotube de carbone. Ce magnétomètre devrait être suffisamment sensible pour étudier les propriétés magnétiques de molécules individuelles attachées au nanotube de carbone.
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Genestoux, Maxime. "Synthèse et optimisation de renforts hybrides nano-micro." Châtenay-Malabry, Ecole centrale de Paris, 2008. http://www.theses.fr/2008ECAP1117.

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La structure unidimensionnelle des nanotubes de carbone (NTC) leur confère des propriétés exceptionnelles tant électriques que thermiques ou mécaniques. En conjugant cette structure nanométrique à des charges micrométriques sous forme de poudre, nous avons travaillé à la réalisation de nouveaux renforts multi-échelles aux propriétés modulables. Au LMSSMat a été devéloppé un procédé original de croissance de NTC par CVD d'aérosol, permettant de faire croître des NTC multi-parois à la surface de particules céramiques. Ce manuscrit rapporte la synthèse et la caractérisation de NTC sur des charges particulaires. Trois aspects y sont abordés : (i) la synthèse de NTC par décomposition catalytique d'hydrocarbures (CVD), (ii) l'utilisation de la pyrolyse d'aérosol comme alternative à la croissance des NTC, (iii) la réutilisation de renforts hybrides de NTC supportés par des particules céramiques. L'influence prédominante de la température, du débit de liquide ainsi que du temps d'injection a été démontrée. L'interaction entre la température, la concentration et la durée d'injection a été mise en avant. Une analyse de régression multilinéaire a permis d'estimer la longueur des nanotubes en fonction des différents paramètres de synthèse. Ce modèle analytique simple permet l'optimisation de la longueur des renforts hybrides selon l'application souhaitée. Cette approche servira de base à la conception de renforts hybrides à l'échelle industrielle.
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Penu, Christian Hu Guo Hua Choplin Lionel. "Nanocomposites à matrice polyamide 6 ou polystyrène et à renforts de nanotubes de carbone du procédé de synthèse aux phénomènes de percolation /." S. l. : INPL, 2008. http://www.scd.inpl-nancy.fr/theses/2008_PENU_C.pdf.

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Wang, Genwei. "Stabilité du nanotube de carbone : fabrication et comportement mécanique du composites à base des nanotubes." Cachan, Ecole normale supérieure, 2006. http://tel.archives-ouvertes.fr/tel-00136102.

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Dans les premières parties, le flambage du nanotube de carbone sous ses poids propres a été analysé sous hypothèse de mécanique des milieux continus. Cela montre que le rapport critique de longueur/diamètre peut aller jusqu'à 106. On utilise aussi un modèle de poutre pour étudier la valeur critique de longueur pour que les deux nanotubes se collent sous action des forces de van der Waals. Ceci dans le but d'une guide de conception de nano interrupteur. La suite de la thèse est consacrée à la fabrication des composites à base de résine avec les renforts des particules de sic mais avec les nanotubes poussées dessus. Différents tests sous chargement statique et dynamique ont été utilisés pour étudier l'effet de ces renforts. L'observations microscopiques montrent par ailleurs que ces charges ont été dispersées de façon homogène<br>The stability of carbon nanotube under self weight is analyzed by continuum method. Research results show that the critical aspect ratio can reach to 106. Double cantileveled beam model is used to study the pull in instability of two carbon nanotubes under van der waals forces. The obtained results are useful for the critical design of carbon nanotube based nanoswitch. Carbon nanotube/sic (cnt/sic) hybrid structure are fabricated by chemical vapor despositon. Different loadings of cnt/sic are added into epoxy resin to make micro/nanoscale hybrid composites. The static and dynamic compressive tests are first made to study the renforcement of different filler. Sem observation on the facture surfaces shows that both carbon nanotube and sic particle are dispersed homogeneously
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Zacca-Fadous, Maria-José. "Synthèse des matériaux hybrides organiques-inorganiques pour l’application dans l’énergie et l’environnement." Thesis, Montpellier, 2015. http://www.theses.fr/2015MONTS221/document.

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Le domaine des matériaux hybrides organiques-inorganiques prend beaucoup plus d'importance de jour en jour. Ce projet de thèse traite les avantages de ce genre de matériaux et synthétise des matériaux utilisés dans deux domaines, le premier celui de l'énergie et le second dans l'environnement.Des matériaux π-conjugués à base de poly(3-hexylthiophène) (P3HT) et de silice sont synthétisés et caractérisés. Il a été montré que l'auto-assemblage lors du procédé sol-gel favorise la polymérisation régiorégulière des motifs thiophènes au sein du matériau.D'un autre coté, des matériaux hybrides organisés (mésoporeux et lamellaires) fonctionnalisés par des groupements amines ou acides ont été préparés et caractérisés. Par des modifications chimiques simples, il a été possible de rendre ces matériaux utilisables comme résines échangeuses d’ions pour la dépollution de l'eau. Les résultats montrent que les matériaux lamellaires sodiques s'avèrent les plus efficaces. Ces mêmes matériaux sont testés au niveau de la catalyse chimique et de l'époxydation qui a ouvert plusieurs perspectives sur le sujet<br>The field of organic-inorganic hybrid materials takes much more importance day by day. This thesis project addresses the benefits of such materials and summarizes the materials used in two areas, energy and environment.Π-conjugated materials based on poly (3-hexylthiophene) (P3HT) and silica were synthesized and characterized. We showed that the organization obtained thanks to self-assembly of the alkylenes chains and during the sol-gel process promote a regioregular polymerization of thiophenes units.On the other hand, organized (mesoporous and lamellar) hybrid materials functionalized with amines or carboxylic acids groups were synthesized and characterized. By chemichal modifications zwitterionic materials were and used for ions extractions from water. The results show that the layered materials containig sodium ions are the most effective for the cations extraction. These same materials were tested as catalysts for epoxidation which opened several perspectives on the subject
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He, Delong. "Formation de structures hybride de nanotubes de carbone et de microparticules d'alumine par la méthode CVD : mécanismes et cinétiques chimiques." Phd thesis, Ecole Centrale Paris, 2010. http://tel.archives-ouvertes.fr/tel-00504681.

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Les nanotubes de carbone (CNTs), intégrant à la fois la structure parfaite, la géométrie unique, et des propriétés exceptionnelles, sont d'une grande importance dans le domaine des nanotechnologies. Leur association avec d'autres matériaux produit de nouvelles propriétés remarquables, et étend par conséquent leurs domaines d'applications comme charges multifonctionnelles. Cette thèse vise à développer un nouveau matériau hybride avec une structure multi-échelle à base de CNTs et de particules micrométriques d'alumine (mAl2O3) par une méthode de dépôt chimique en phase vapeur (CVD). Nos études démontrent que les structures CNTs-mAl2O3 ont une propriété exceptionnelle en matière de transport thermique dans les composites polymères. Celle-ci nous a amenée à explorer plus en profondeur les mécanismes de l'organisation des CNTs sur mAl2O3, et d'étudier la cinétique de réactions chimiques dans l'espace gazeux du réacteur CVD. Dans le premier chapitre, nous faisons une revue de l'état de l'art sur la structure, les propriétés et les applications des CNTs, ainsi que les mécanismes de croissance de CNTs par CVD. Une attention particulière est également accordée aux structures hybrides nano-micrometriques qui sont synthétisées par greffage in-situ des CNTs sur des substrats micrométriques. Dans le deuxième chapitre, nous présentons trois types de structures hybrides, qui sont classifiées selon différents modes d'organisation des CNTs sur les microsphères d'alumine. L'évolution des structures hybrides est démontrée en faisant varier le diamètre, la longueur et la densité numérique des CNTs sur mAl2O3. L'organisation specifique et la dispersion homogène des CNTs permettent de diminuer considérablement leurs résistances de contacts thermiques lorsque les matériaux hybrides CNTs-mAl2O3 sont utilisés comme charges dans les composites polymères. Une amélioration importante de la conductivité thermique des composites Epoxy/CNTs-mAl2O3, par rapport à celle des composites constitués de CNTs et de résine époxy, est obtenue à une fraction massique ultra-faible en CNTs. Dans le troisième chapitre, nous avons étudié en détail les rôles joués par les paramètres CVD et les microparticules sphériques d'alumine dans la construction de structures hybrides multiformes. En particulier, les fortes corrélations entre la température, les sources de carbone et les ratios d'hydrogène ont été discutées. Le lien entre les CNTs et les microparticules est mis en évidence, ainsi que la dynamique de croissance des CNTs. L'auto-organisation des CNTs sur mAl2O3 est expliquée par les deux mécanismes suivants. Dans un premier temps, la structure hétérogène de la surface des particules entraîne une distribution différente des particules du catalyseur, et leur arrangement cristallin spécifique détermine potentiellement l'orientation des CNTs. Dans un deuxième temps, l'auto-assemblage des CNTs est dû à l'interaction des forces faibles de Van der Waals entre CNTs voisins. Le calcul basé sur le modèle du nano-cantilever montre que l'auto-assemblage des CNTs dépend fortement de leur diamètre, de leur longueur et de leur densité numérique sur mAl2O3. Dans le quatrième chapitre, la cinétique chimique des réactions dans l'espace gazeux du réacteur CVD est numériquement analysée. Le processus non-équilibré de CVD qui contient plusieurs phénomènes physico-chimiques est simulé avec succès en combinant la cinétique des réactions chimiques avec les phénomènes de transport physique. Les champs des concentrations de chaque espèce est révélée aux températures utilisées par simulation des réactions chimiques. Les sources effectives de carbone et de fer pour la croissance des CNTs ont été éclaircies en comparant les résultats de simulation avec les observations expérimentales, y compris les mesures de spectrométrie de masse. Ces analyses sont nécessaires pour améliorer la production des hybrides avec des structures homogènes.
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Marcq, Fabien. "Élaboration, caractérisation et vieillissement d'adhésifs conducteurs hybrides époxy-microparticules d'argent-nanotubes de carbone." Toulouse 3, 2012. http://thesesups.ups-tlse.fr/1750/.

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Ce travail de thèse a permis le développement d'adhésifs conducteurs électrique et thermique pour des applications spatiales. Il commence par la synthèse des nanotubes de carbone double paroi (DWCNTs) par CCVD. Ces DWCNTs ou des MWCNTs commerciaux sont dispersés par voie solvant avec des microparticules d'argent (µAg) dans une matrice époxy (EP). Une caractérisation des composites (EP + µAg + DWCNTs et EP + µAg + MWCNTs) s'ensuit : étude de la microstructure, des conductivités électrique et thermique et des propriétés mécaniques. Deux types d'essais de vieillissement permettent enfin de montrer des propriétés électriques stables dans le temps et des propriétés de tenue mécanique supérieures aux adhésifs cond<br>The aim of this PhD work was the development of electrically and thermally conductive adhesives for space applications. It begins with the manufacturing by CCVD of double-walled carbon nanotubes (DWCNTs). These DWCNTs or commercial MWCNTs are dispersed by solvent route with micrometric silver flakes (µAg) in an epoxy matrix (EP). A characterization of resulting composites (EP + µAg + DWCNTs and EP + µAg + MWCNTs) follows: study of the microstructure, the electrical and thermal conductivities and the mechanical properties. Two types of reliability tests show lastly stable electrical properties over the time and higher mechanical properties than commercial thermally conductive adhesives currently in use in space industry
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Fabien, Marcq. "Elaboration, caractérisation et vieillissement d'adhésifs conducteurs hybrides époxy / microparticules d'argent / nanotubes de carbone." Phd thesis, Université Paul Sabatier - Toulouse III, 2012. http://tel.archives-ouvertes.fr/tel-00723854.

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Ce travail de thèse a permis le développement d'adhésifs conducteurs électrique et thermique pour des applications spatiales. Il commence par la synthèse des nanotubes de carbone double paroi (DWCNTs) par CCVD. Ces DWCNTs ou des MWCNTs commerciaux sont dispersés par voie solvant avec des microparticules d'argent (µAg) dans une matrice époxy (EP). Une caractérisation des composites (EP + µAg + DWCNTs et EP + µAg + MWCNTs) s'ensuit : étude de la microstructure, des conductivités électrique et thermique et des propriétés mécaniques. Deux types d'essais de vieillissement permettent enfin de montrer des propriétés électriques stables dans le temps et des propriétés de tenue mécanique supérieures aux adhésifs conducteurs thermiques actuellement utilisés dans le domaine spatial.
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Books on the topic "Nanotubes hybrides"

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Fan, Wei, Longsheng Zhang, and Tianxi Liu. Graphene-Carbon Nanotube Hybrids for Energy and Environmental Applications. Springer Singapore, 2017. http://dx.doi.org/10.1007/978-981-10-2803-8.

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Paipetis, A. Carbon Nanotube Enhanced Aerospace Composite Materials: A New Generation of Multifunctional Hybrid Structural Composites. Springer Netherlands, 2013.

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Fan, Wei, Longsheng Zhang, and Tianxi Liu. Graphene-Carbon Nanotube Hybrids for Energy and Environmental Applications. Springer, 2016.

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Grove-Rasmussen, K. Hybrid Superconducting Devices Based on Quantum Wires. Edited by A. V. Narlikar. Oxford University Press, 2017. http://dx.doi.org/10.1093/oxfordhb/9780198738169.013.16.

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This article reviews the experimental progress in hybrid superconducting devices based on quantum wires, in the form of semiconductor nanowires or carbon nanotubes, which are coupled to superconducting electrodes. It also presents a series of recent examples which illustrate the key phenomena that have allowed detailed investigations of important scenarios, including individual impurities on superconductors and proximitized systems that may hold Majorana quasiparticles. After describing experimental aspects of hybrid devices, including materials and fabrication techniques, the article considers superconducting junctions with normal quantum dots (QDs). It then turns to experiments on superconductivity-enhanced QD spectroscopy, sub-gap states in hybrid QDs, and non-local signals in Cooper pair splitter devices. Finally, it discusses the growth of epitaxial semiconductor–superconductor nanowire hybrids.
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Oshiyama, Atsushi, and Susumu Okada. Roles of shape and space in electronic properties of carbon nanomaterials. Edited by A. V. Narlikar and Y. Y. Fu. Oxford University Press, 2017. http://dx.doi.org/10.1093/oxfordhb/9780199533053.013.3.

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This article examines how internal space and boundary shapes affect the electronic properties of carbon nanomaterials by conducting total-energy electronic-structure calculations based on the density-functional theory. It first considers the existence of nanospace in carbon peapods before discussing boundaries in planar and tubular nanostructures. It also describes double-walled nanotubes, defects in carbon nanotubes, and hybrid structures of carbon nanotubes. Finally, it discusses the magnetic properties of zigzag-edged graphene ribbons and carbon nanotubes as well as the essential role of the edge state. The article shows that both space and peas (fullerenes) are decisive in electronic properties. In carbon peapods, nearly free-electron states occurring in the internal space hybridize with carbon orbitals and then make the peapod a new multicarrier system. The edge state belongs to a new class of electron states that is inherent to zigzag borders in hexagonally bonded networks.
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Pinto, Susana, Paula Marques, Carla Vilela, Ricardo João Borges Pinto, Armando Silvestre, and Carmen Sofia da Rocha Freire Barros. Polysaccharide Based Hybrid Materials: Metals and Metal Oxides, Graphene and Carbon Nanotubes. Springer, 2018.

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Hong, S., Y. K. Kwon, J. S. Ha, N. K. Lee, B. Kim, and M. Sung. Self-assembly strategy of nanomanufacturing of hybrid devices. Edited by A. V. Narlikar and Y. Y. Fu. Oxford University Press, 2017. http://dx.doi.org/10.1093/oxfordhb/9780199533060.013.10.

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This article considers the nanomanufacturing of hybrid devices using the self-assembly strategy. Hybrid devices utilize nanomaterials such as nanoparticles, organic molecules, carbon nanotubes (CNTs), and nanowires. Examples include CNT-based circuits and molecular electronics. However, a major stumbling block holding back the practical applications of hybrid systems can be a lack of a mass-production method for such devices. This article first describes the direct patterning of nanostructures by means of dip-pen nanolithography and microcontact printing before discussing the fabrication of nanostructures using directed assembly. It also examines the mechanism of various assembly processes ofnanostructures and concludes with an overview of the characteristics of self-assembled hybrid nanodevices.
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Paipetis, A., and V. Kostopoulos. Carbon Nanotube Enhanced Aerospace Composite Materials: A New Generation of Multifunctional Hybrid Structural Composites. Springer, 2014.

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Paipetis, A., and V. Kostopoulos. Carbon Nanotube Enhanced Aerospace Composite Materials: A New Generation of Multifunctional Hybrid Structural Composites. Springer, 2012.

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Narlikar, A. V., and Y. Y. Fu, eds. Oxford Handbook of Nanoscience and Technology. Oxford University Press, 2017. http://dx.doi.org/10.1093/oxfordhb/9780199533060.001.0001.

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This volume highlights engineering and related developments in the field of nanoscience and technology, with a focus on frontal application areas like silicon nanotechnologies, spintronics, quantum dots, carbon nanotubes, and protein-based devices as well as various biomolecular, clinical and medical applications. Topics include: the role of computational sciences in Si nanotechnologies and devices; few-electron quantum-dot spintronics; spintronics with metallic nanowires; Si/SiGe heterostructures in nanoelectronics; nanoionics and its device applications; and molecular electronics based on self-assembled monolayers. The volume also explores the self-assembly strategy of nanomanufacturing of hybrid devices; templated carbon nanotubes and the use of their cavities for nanomaterial synthesis; nanocatalysis; bifunctional nanomaterials for the imaging and treatment of cancer; protein-based nanodevices; bioconjugated quantum dots for tumor molecular imaging and profiling; modulation design of plasmonics for diagnostic and drug screening; theory of hydrogen storage in nanoscale materials; nanolithography using molecular films and processing; and laser applications in nanotechnology. The volume concludes with an analysis of the various risks that arise when using nanomaterials.
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Book chapters on the topic "Nanotubes hybrides"

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Ménard-Moyon, Cécilia. "Covalent Organic Functionalization and Characterization of Carbon Nanotubes." In Chemistry of Organo-Hybrids. John Wiley & Sons, Inc., 2015. http://dx.doi.org/10.1002/9781118870068.ch1.

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

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Vilela, Carla, Ricardo João Borges Pinto, Susana Pinto, Paula Marques, Armando Silvestre, and Carmen Sofia da Rocha Freire Barros. "Polysaccharides-Based Hybrids with Carbon Nanotubes." In SpringerBriefs in Molecular Science. Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-030-00347-0_5.

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Liu, Tianxi, Wei Fan, and Chao Zhang. "Carbon Nanotube-Based Hybrid Materials and Their Polymer Composites." In Polymer Nanotube Nanocomposites. John Wiley & Sons, Inc., 2014. http://dx.doi.org/10.1002/9781118945964.ch7.

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Gu, Lingrong, Fushen Lu, Pengju G. Luo, Haifang Wang, Mohammed J. Meziani, and Ya-Ping Sun. "Functionalized Carbon Nanotubes for Bioapplications." In The Supramolecular Chemistry of Organic-Inorganic Hybrid Materials. John Wiley & Sons, Inc., 2010. http://dx.doi.org/10.1002/9780470552704.ch6.

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Sun, Hao, Xuemei Sun, Zhibin Yang, and Huisheng Peng. "Aligned Carbon Nanotubes and Their Hybrids for Supercapacitors." In Nanocarbons for Advanced Energy Storage. Wiley-VCH Verlag GmbH & Co. KGaA, 2015. http://dx.doi.org/10.1002/9783527680054.ch12.

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Herranz, MaÁngeles, Beatriz M. Illescas, Emilio M. Pérez, and Nazario Martín. "Supramolecular Assembly of Fullerenes and Carbon Nanotubes Hybrids." In Chemistry of Nanocarbons. John Wiley & Sons, Ltd, 2010. http://dx.doi.org/10.1002/9780470660188.ch2.

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Papagelis*, Konstantinos. "Chapter 9. Raman Spectroscopy of Carbon Nanotube–Polymer Hybrid Materials." In Carbon Nanotube-Polymer Composites. Royal Society of Chemistry, 2013. http://dx.doi.org/10.1039/9781849736817-00253.

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Liu, Zhi, Hua-Fei Li, Shuguang Deng, and Gui-Ping Dai. "Chapter 3. Synthesis of Carbon Nanotube/Graphene Hybrids by Chemical Vapor Deposition." In All-carbon Composites and Hybrids. Royal Society of Chemistry, 2021. http://dx.doi.org/10.1039/9781839162718-00053.

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Sharma, Sushant, and Bhanu Pratap Singh. "Chapter 12. Mechanical Properties of Graphene–Carbon Nanotube Reinforced Hybrid Polymer Nanocomposites." In All-carbon Composites and Hybrids. Royal Society of Chemistry, 2021. http://dx.doi.org/10.1039/9781839162718-00278.

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Conference papers on the topic "Nanotubes hybrides"

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Jung, Yung J., Laila Jaber-Ansari, Xugang Xiong, et al. "Highly Organized Carbon Nanotube-PDMS Hybrid System for Multifunctional Flexible Devices." In ASME 2007 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/detc2007-35442.

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We will present a method to fabricate a new class of hybrid composite structures based on highly organized multiwalled carbon nanotube (MWNT) and singlewalled carbon nanotube (SWNT) network architectures and a polydimethylsiloxane (PDMS) matrix for the prototype high performance flexible systems which could be used for many daily-use applications. To build 1–3 dimensional highly organized network architectures with carbon nanotubes (both MWNT and SWNT) in macro/micro/nanoscale we used various nanotube assembly processes such as selective growth of carbon nanotubes using chemical vapor deposition (CVD) and self-assembly of nanotubes on the patterned trenches through solution evaporation with dip coating. Then these vertically or horizontally aligned and assembled nanotube architectures and networks are transferred in PDMS matrix using casting process thereby creating highly organized carbon nanotube based flexible composite structures. The PDMS matrix undergoes excellent conformal filling within the dense nanotube network, giving rise to extremely flexible conducting structures with unique electromechanical properties. We will demonstrate its robustness under large stress conditions, under which the composite is found to retain its conducting nature. We will also demonstrate that these structures can be directly utilized as flexible field-emission devices. Our devices show some of the best field enhancement factors and turn-on electric fields reported so far.
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Rocker, Samantha N., T. Wade Pearrell, Engin C. Sengezer, and Gary D. Seidel. "Thermo-Electromechanical Response of Polymer-Bonded Explosives for Structural Health Monitoring of Energetic Materials." In ASME 2017 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/smasis2017-3869.

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Distributing a carbon nanotube sensing network throughout the binder phase of energetic composites is investigated in an effort for real time embedded sensing of localized heating in polymer bonded explosives (PBXs) through thermo-electromechanical response for in situ structural health monitoring (SHM) in energetic materials. The experimental effort herein is focused on using 70 wt% Ammonium Perchlorate (AP) (solid oxidizer used in solid rocket propellants) crystals embedded into epoxy binder having concentration of 0.1 wt% multi-walled carbon nanotubes (MWCNTs) relative to entire hybrid energetics. Electrical and dielectric properties of neat (i.e. no MWCNTs) energetics and MWCNT hybrid energetics are quantitatively and qualitatively evaluated under localized thermal loading. Electrical and dielectric properties showed variations for both neat energetics and MWCNT hybrid energetics depending on input frequency measurements. Significant thermo-electromechanical response was obtained for MWCNT AP hybrid energetics, providing a proof of concept for thermo-electromechanical sensing for realtime SHM in energetics.
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Griadun, V. I. "Characteristics of hybrid multiwall nanotubes." In 2010 20th International Crimean Conference "Microwave & Telecommunication Technology" (CriMiCo 2010). IEEE, 2010. http://dx.doi.org/10.1109/crmico.2010.5633015.

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Avila, Antonio F., and Glaucio C. Pereira. "Graphene-Carbon Nanotubes Hybrids for Composite Materials." In 56th AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference. American Institute of Aeronautics and Astronautics, 2015. http://dx.doi.org/10.2514/6.2015-0645.

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Parsa, A., and M. Mosavi Mashhadi. "An Inverse Numerical/Analytical Approach to Predict the Material Properties of Carbon Nanotube/Polymer Interphase." In ASME 2010 10th Biennial Conference on Engineering Systems Design and Analysis. ASMEDC, 2010. http://dx.doi.org/10.1115/esda2010-25320.

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There is substantial interest in using carbon nanotubes (CNTs) to create multifunctional polymer composite materials with outstanding mechanical, electrical, and thermal properties. A difficulty in modeling the behavior of these systems is the non-bulk interphase region in these systems that forms due to nanoscale interactions between the embedded NTs and adjacent polymer chains. However, the mechanical properties of this interphase region are unknown and very difficult to measure directly from experimental testing due to the size scale of this interphase region. Thus a three-phase (nanotube, interphase and matrix) Mori-Tanaka micromechanical model has been developed such that the properties of this interphase region can be inferred from macroscale elastic data. Both as-received and functionalized NTs have been considered in order to investigate the influence of functionalization on predicted mechanical properties of the interphase. A hybrid finite element-micromechanical method is also used to consider the effect of NT waviness in modeling. Results show that the Young’s modulus of interphase region is significantly higher than that of bulk polymer and it must be considered as an independent reinforcement mechanism in CNT/polymer nanocomposites.
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Andricevic, Pavao, Xavier Mettan, Márton Kollár, et al. "Vertically aligned carbon nanotube-perovskite light emitting electrochemical cells." In 2nd Asia-Pacific Hybrid and Organic Photovoltaics. Fundació Scito, 2017. http://dx.doi.org/10.29363/nanoge.ap-hopv.2018.036.

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Sayago, I., M. Aleixandre, M. C. Horrillo, R. Garriga, A. Kukovecz, and E. Munoz. "Carbon nanotube/TiO2 nanotube hybrid films as resistive gas sensor." In 2013 Transducers & Eurosensors XXVII: The 17th International Conference on Solid-State Sensors, Actuators and Microsystems (TRANSDUCERS & EUROSENSORS XXVII). IEEE, 2013. http://dx.doi.org/10.1109/transducers.2013.6626835.

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Ronaghi, Zahra, Yongkuk Lee, Chenbo Dong, Cerasela Zoica Dinu, and Parviz Famouri. "Carbon nanotube - actin hybrid assemblies." In 2012 IEEE 12th International Conference on Nanotechnology (IEEE-NANO). IEEE, 2012. http://dx.doi.org/10.1109/nano.2012.6322145.

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Apartsin, Evgeny, Daria Novopashina, and Alya Venyaminova. "Non-covalent fluorescent hybrids of carbon nanotubes with oligonucleotides." In XVth Symposium on Chemistry of Nucleic Acid Components. Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, 2011. http://dx.doi.org/10.1135/css201112421.

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Baker, Benjamin, Tae-Gon Cha, M. Dane Sauffer, Yujun Wu, and Jong Hyun Choi. "Light Harvesting Single Wall Carbon Nanotube Hybrids." In 2010 18th Biennial University/ Government/Industry Micro/Nano Symposium (UGIM). IEEE, 2010. http://dx.doi.org/10.1109/ugim.2010.5508913.

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