Relevant bibliographies by topics / Nanotubes of carbon

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Academic literature on the topic 'Nanotubes of carbon'

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

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Journal articles on the topic "Nanotubes of carbon"

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Hajeeassa, Khdejah S., Mahmoud A. Hussein, Yasir Anwar, Nada Y. Tashkandi, and Zahra M. Al-amshany. "Nanocomposites containing polyvinyl alcohol and reinforced carbon-based nanofiller." Nanobiomedicine 5 (January 1, 2018): 184954351879481. http://dx.doi.org/10.1177/1849543518794818.

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A new class of biologically active polymer nanocomposites based on polyvinyl alcohol and reinforced mixed graphene/carbon nanotube as carbon-based nanofillers with a general abbreviation (polyvinyl alcohol/mixed graphene–carbon nanotubes) has been successfully synthesized by an efficient solution mixing method with the help of ultrasonic radiation. Mixed graphene and carbon nanotubes ratio has been prepared (50%:50%) wt by wt. Different loading of mixed graphene–carbon nanotubes (2, 5, 10, 15, and 20 wt%) were added to the host polyvinyl alcohol polymer. In this study, polyvinyl alcohol/mixed graphene–carbon nanotubesa–e nanocomposites were characterized and analyzed by X-ray diffraction, Fourier transform infrared, scanning electron microscopy, transmission electron microscopy, and the thermal stability was measured by thermogravimetric analysis and derivative thermal gravimetric. Fourier transform infrared and X-ray diffraction spectra proved the addition of mixed graphene–carbon nanotubes into polyvinyl alcohol matrix. X-ray diffraction patterns for these nanocomposites showed 2 θ = 19.35° and 40° due to the crystal nature of polyvinyl alcohol in addition to 2 θ = 26.5° which attributed to the graphite plane of carbon-based nanofillers. Thermal stability of polyvinyl alcohol/mixed graphene–carbon nanotubes nanocomposites was enhanced comparing with pure polyvinyl alcohol. The main degradation step ranged between 360° and 450°C. Moreover, maximum composite degradation temperature has appeared at range from 285°C to 267°C and final composite degradation temperature (FCDT) displayed at a temperature range of 469–491°C. Antibacterial property of polyvinyl alcohol/mixed graphene–carbon nanotubesa–e nanocomposites were tested against Escherichia coli bacteria using the colony forming units technique. Results showed an improvement of antibacterial property. The rate percentages of polyvinyl alcohol/mixed graphene–carbon nanotubesb, polyvinyl alcohol/mixed graphene–carbon nanotubesc, and polyvinyl alcohol/mixed graphene–carbon nanotubesd nanocomposites after 24 h are 6%, 5%, and 7% respectively. However, polyvinyl alcohol/mixed graphene–carbon nanotubese nanocomposite showed hyperactivity, where its reduction percentage remarkably raised up to 100% which is the highest inhibition rate percentage. In addition, polyvinyl alcohol and polyvinyl alcohol/graphene–carbon nanotubesa–d showed colony forming units values/ml 70 × 106 and 65 ± 2 × 106 after 12 h. After 24 h, the colony forming units values/ml were in the range of 86 × 106–95 × 106.
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Kumar, Ponnusamy Senthil, and G. Janet Joshiba. "Carbon Nanotube Composites." Diffusion Foundations 23 (August 2019): 75–81. http://dx.doi.org/10.4028/www.scientific.net/df.23.75.

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The discovery of carbon nanotubes is one of the remarkable achievement in the field of material science and it is a great advancement of Nanotechnology. A carbon nanotube is an expedient material used in several domains and paves way for the welfare of humans in many ways. Carbon nanotubes are nanosized tubes made from graphitic carbons and it is well known for its exclusive physical and chemical properties. The market demand for the nanotubes has increased progressively due to its size dependent, structure and mechanical properties. The carbon nanotubes possess high tensile strength and it is also found to be the durable fibre ever known. It is also found to possess exceptional electrical properties. The carbon nanotube composites have an excellent young’s modulus and higher tensile strength same as graphite carbon. This review plots the properties of carbon nanotubes and portrays the planning and properties of carbon nanotube composites. The wide application of carbon nanotube composites is also explained.
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Lin, Tong, Vardhan Bajpai, Tao Ji, and Liming Dai. "Chemistry of Carbon Nanotubes." Australian Journal of Chemistry 56, no. 7 (2003): 635. http://dx.doi.org/10.1071/ch02254.

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Judicious application of site-selective reactions to non-aligned and aligned carbon nanotubes has opened a rich field of carbon nanotube chemistry. In order to meet specific requirements demanded by particular applications (e.g. biocompatibility for nanotube biosensors and interfacial strength for blending with polymers), chemical modification of carbon nanotubes is essential. The tips of carbon nanotubes are more reactive than their sidewalls, allowing a variety of chemical reagents to be attached at the nanotube tips. Recently, some interesting reactions have also been devised for chemical modification of both the inner and outer nanotube walls, though the seamless arrangement of hexagon rings renders the sidewalls relatively unreactive. This review provides a brief summary of very recent progress in the research on chemistry of carbon nanotubes.
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Gábor, T., D. Aranyi, Katalin Papp, F. H. Kármán, and Erika Kálmán. "Dispersibility of Carbon Nanotubes." Materials Science Forum 537-538 (February 2007): 161–68. http://dx.doi.org/10.4028/www.scientific.net/msf.537-538.161.

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Availability of a stable carbon nanotube suspension is a prerequisite for production of polymer composites with carbon nanotube as additives. In this work nanotube suspensions, which have been prepared from various nanotubes in different dispersion agents, were compared. Dispersibility of the samples was investigated by scanning electon microscopy and atomic force microscopy. Solution of a non-ionic surfactant was also used successfully as a new dispersion agent. Geometrical parameters of the carbon nanotubes were determined by using atomic force microscopy. Correlation was found between the dispersibility and the parameters of the nanotubes and relative permittivity of the different solvents.
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Marcondes, C. G. N., and M. H. F. Medeiros. "Análisis de la dispersión de soluciones conteniendo nanotubos de carbono para su uso en concretos de Cemento Portland." Revista ALCONPAT 6, no. 2 (May 31, 2016): 84–100. http://dx.doi.org/10.21041/ra.v6i2.131.

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Análisis de la dispersión de soluciones conteniendo nanotubos de carbono para su uso en concretos de Cemento PortlandRESUMENLos nanotubos de carbono (NTC) son estructuras nanométricas de carbono en formas cilíndricas. Para su uso en hormigón, una de las dificultades es su dispersión, enfoque de este trabajo. Se utilizó una herramienta conocida como análisis jerárquico para investigar la eficiencia de dispersión de los NTC en el agua de la mezcla de hormigón. Fueron estudiados 12 maneras de dispersiones en medio acuoso que contiene diferentes productos químicos. Se usaron los nanotubos de carbono de pared múltiple en forma de polvo y los ya procesados, dispersos en agua. El estudio mostró que la herramienta de análisis jerárquico podría constituir una alternativa eficaz para la elección de una mejor dispersión, teniendo en cuenta los factores que influyen en forma sistémica.Palabras clave: Proceso de análisis jerárquico; hormigón; nanotubos de carbón. Analyzing the dispersion of carbon nanotubes solution for use in Portland cement concreteABSTRACTCarbon nanotubes (CNTs) are nanometric carbon structures with cylindrical formats. For use in concretes, one of the difficulties is in its dispersion, focus this work. It used a tool known as hierarchical analysis to investigate the efficiency of the dispersion of carbon nanotubes in concrete kneading water. Were studied 12 forms of dispersions in aqueous medium containing hum Miscellaneous Chemicals. Carbon nanotubes multi-walled in powder form and Processed already dispersed in water were used. The study showed that the hierarchical analysis tool might constitute an alternative to the election of the best choice among the available options, considering the factors of influence in a systemic way.Keywords: Analytical hierarchy process; concrete; carbon nanotubes. Análise da dispersão de soluções contendo nanotubos de carbono para uso em concretos de Cimento PortlandRESUMOOs nanotubos de carbono (NTC) são estruturas nanometricas de carbono com formatos cilindricos. Para uso em concretos, uma das dificuldades está na sua dispersão, foco deste trabalho. Foi usada uma ferramenta conhecida como análise hierárquica. Para investigar a eficiência da dispersão dos nanotubos de carbono na água de amassamento do concreto, foram estudados 12 formas de dispersões em um meio aquoso contendo diversos produtos químicos. Foram utilizados os nanotubos de carbono de paredes múltiplas em forma de pó e os industrializados, já dispersos em água. O trabalho demonstrou que a ferramenta de análise hierárquica poderia se constituir em uma alternativa eficiente para a eleição da melhor dispersão, considerando os fatores de influência de forma sistêmica.Palavras-chave: Análise Hierárquica; concreto; nanotubos de carbono.
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Zhang, J. W., Zhen Luo, Y. L. Li, J. D. Zhu, and J. Hao. "A Welding Method for Carbon Nanotubes." Advanced Materials Research 160-162 (November 2010): 737–42. http://dx.doi.org/10.4028/www.scientific.net/amr.160-162.737.

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A simple and reliable welding method was developed to weld carbon nanotubes with the power supply here. The carbon nanotubes were synthesized chemical vapor deposition method and Multi-walled carbon nanotubes was uesd here. Firstly, apply less than 5 V voltages between carbon nanotubes when they were in close proximity under direct view of optical microscope. Then, let carbon nanotube contact with each other and increase the external voltage to 7–8V until carbon nanotube was attached to the end of the other, the two carbon nanotube join into a carbon nanotube. Furthermore, some experiments were implemented to analyze the reliability, the images of the weld joint and the weld strength all indicted this method were reliable.
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Shahrukh, Akhtar M., Zhonglie An, Masaya Toda, and Takahito Ono. "140 Mechanical properties of Carbon nanotubes-nickel composite thin films synthesized with high carbon nanotube content." Proceedings of Conference of Tohoku Branch 2016.51 (2016): 77–78. http://dx.doi.org/10.1299/jsmeth.2016.51.77.

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Sun, Bao Min, Yuan Chao Liu, and Zhao Yong Ding. "Carbon Nanotubes Preparation Using Carbon Monoxide from the Pyrolysis Flame." Advanced Materials Research 87-88 (December 2009): 104–9. http://dx.doi.org/10.4028/www.scientific.net/amr.87-88.104.

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Carbon nanotube is a new kind of carbon material. Synthesis of carbon nanotubes from V-type pyrolysis flame is a kind of novel technique. It needs simple laboratory equipments and normal atmosphere pressure. The V-type pyrolysis flame experimental system is introduced. Carbon source is the carbon monoxide which is carried to the middle pipe of V-type pyrolysis flame combustor. Heat source is from acetylene /air premixed flame. Pentacarbonyl iron, served as catalyst, is transported by spray- pyrolysis method into the burner. The carbon nanotubes were characterized by scanning electron microscope and transmission electron microscope. The diameter of carbon nanotubes is approximate 20nm and its length is dozens of microns. The impact of the temperature, reactant composition and catalyst was analyzed to reveal the rule of carbon nanotube growth. Carbon nanotubes with good form and less impurity can be captured when the temperature was from 800°C to 1000°C and carbon monoxide/hydrogen/helium mixed gas flow was supplied. The effective diameter of pentacarbonyl iron nanoparticles is approximate from 5nm to 20nm in the process of carbon nanotube formation. Mechanism of carbon nanotube base on the V-type pyrolysis flame method was proposed. The carbon “dissolved-proliferation-separate out” theory can be used to explain how the pentacarbonyl iron catalyses carbon monoxide to form carbon nanotubes.
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Liu, Yuan Chao, Ya Jie Zhang, Ya Jun Wu, and Bao Min Sun. "Carbon Nanotubes with Special Structure from the Pyrolysis Flame." Advanced Materials Research 261-263 (May 2011): 909–12. http://dx.doi.org/10.4028/www.scientific.net/amr.261-263.909.

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Carbon nanotube is the one-dimensional carbon nano-materials. The synthesis of carbon nanotubes from pyrolysis flame is a new method. Variety of carbon nanotubes with special structure can be seen from pyrolysis flame due to the influence of key factors such as the concentration of reactants and catalyst particle size. The morphology and structural of carbon nanotubes were characterized by scanning electron microscope and transmission electron microscopy respectively. Carbon nanotubes with special structure such as bamboo-like, pod-like and coil-like can be seen in the experiment. The bamboo-like carbon nanotube has a bamboo-like structure clearly. The shape of pod-like carbon nanotube is very similar with the peasecod. The coil-like carbon nanotube is similar to carbon nanofiber in structure. It was discussed and analyzed that the formation mechanism of bamboo-like, pod-like and coil-like carbon nanotubes from the V-type pyrolysis flame.
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Dresselhaus, M. S., and H. Dai. "Carbon Nanotubes: Continued Innovations and Challenges." MRS Bulletin 29, no. 4 (April 2004): 237–43. http://dx.doi.org/10.1557/mrs2004.74.

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AbstractThis article outlines the content of the April 2004 issue of MRS Bulletin on Advances in Carbon Nanotubes. Essentially, carbon nanotubes are self-assembling nanostructures constructed of sheets of hexagonal-shaped carbon atoms rolled up into cylinders. Carbon nanotubes have attracted a great deal of attention as model systems for nanoscience and for potential applications. The special interest in carbon nanotubes stems from their unique structure and properties: their very small size (down to ∼0.42 nm in diameter); the possibility for carbon nanotubes to be metallic or semiconducting, depending on their geometrical structure; their exceptional properties of ballistic transport; their extremely high thermal conductivity and high optical polarizability; and the possibilities of high structural perfection. Research in the carbon nanotube field has now advanced to the stage where a good understanding of the structure and many of the basic properties are in place, together with much appreciation of their interrelation. On the other hand, major gaps in basic knowledge remain, with the major obstacles confronting the carbon nanotube field being the lack of a detailed understanding of the nanotube growth mechanism and control of the synthesis process to produce nanotubes with a desired diameter and chirality. The brief review of the carbon nanotube field by leading experts in this issue comes at an opportune time. Many exciting results on the structural, electronic, optical, and transport properties of these tiny well-ordered structures have already been achieved, and the research is well enough developed to assess present progress and identify new research directions waiting to be explored.
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Dissertations / Theses on the topic "Nanotubes of carbon"

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Brunner, Eric W. "Bioapplications of carbon nanotubes and carbon nanotube assemblies." Thesis, University of Surrey, 2010. http://epubs.surrey.ac.uk/2858/.

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As new materials are discovered, their potential and applications are investigated widely across the various scientific disciplines for general or highly specialized applications. While new nanomaterials such as carbon nanotubes have received the greatest interest for electronics, optics, and structural composites, their applications have also been explored for biological applications such as sensing, selective cell destruction, cellular growth scaffolds, and intracellular delivery of bioactive cargos. Carbon nanotubes are unique materials particularly suited for these applications as they possess characteristic optical and electronic properties in conjunction with large aspect ratios and massive surface areas. The work of this thesis explores the use of carbon nanotubes for cellular growth scaffolds in Chapters 3, tailoring the various properties of these scaffolds in Chapter 4, and their cellular internalization and intracellular locations in Chapter 5. The aim of Chapters 3 and 4 are to create a surface that mimics a cell's natural environment by varying characteristics such as roughness, pore size distribution, wettability, and chemical functionalization of the carbon nanotubes surface. Such variations can have beneficial, detrimental or abnormal effects on the tested cell line as a cell's natural environment within the body consists of a three dimensional mesh of extracellular matrix proteins which is not at all replicated by the commonly used polystyrene tissue culture flask. Carbon nanotubes possess diameters ranging from 0.7 to several nanometers and lengths that can range up to several microns thereby allowing certain types of CNTs to scale with these extracellular matrix proteins and thus impart a nanoscale textured topology that more closely resembles a cell's in vivo environment. Additionally, the replacement of extracted extracellular matrix proteins for coating cellular growth surfaces with synthetic carbon nanotubes eliminates any risk of pathogen contamination and batch-to-batch variability of biological specimens. Fundamental understanding of the interactions between carbon nanotube surfaces and adhered cell cultures will provide a foundation for carbon nanotube applications in 3- dimensional cellular growth scaffolds and tissue implantation devices. Chapter 5 explores the interactions between designed peptides with slight variations in their amino acid sequences and the consequential effects of these peptide interactions with carbon nanotubes for cellular internalization and intracellular location. The efficacy of pharmaceutical drugs and the cellular responses to biomacromolecules depends heavily upon their abilities to transverse the cellular plasma membranes, and exploring the interactions with designed biomolecules such as synthetic peptides provides simple methods for increasing the cellular internalization of carbon nanotubes and altering the intracellular delivery location. The results and methods investigated within these chapters can then be easily applied to other carbon nanotube transporter schemes.,
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Pach, Elzbieta. "Electron microscopy studies on functional carbon nanotubes." Doctoral thesis, Universitat Autònoma de Barcelona, 2017. http://hdl.handle.net/10803/456581.

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La presente tesis doctoral se centra en el estudio exhaustivo de nanotubos de carbono funcionales por medio de técnicas de microscopía electrónica. Los nanotubos de carbono (CNTs) funcionales están atrayendo una creciente atención debido a su potencial uso para aplicaciones biomédicas, incluyendo para la adquisición de imágenes in vivo, acumulación selectiva en tumores y sistemas de administración de fármacos. Una ventaja intrínseca de los nanotubos de carbono es que su cavidad interna puede llenarse con una carga útil de interés mientras que la superficie externa puede modificarse para mejorar su dispersabilidad y biocompatibilidad. Debido a su potencial aplicación en el campo biomédico, es esencial una caracterización detallada de las muestras en todas las etapas de su proceso de preparación (purificación, acortamiento, llenado y funcionalidad externa). Para lograr este objetivo, en esta tesis doctoral hemos empleado tanto los análisis ya establecidos que incluye microscopía electrónica de transmisión de alta resolución para estudiar la estructura del material de relleno o espectroscopia de dispersión de energía de rayos X para evaluar su composición, pero también hemos explorado el uso de otras técnicas para ampliar las posibilidades de caracterización de las muestras. En este sentido, hemos optimizado las condiciones para el estudio de las longitudes de CNTs monocapa purificados por microscopía electrónica de barrido de alta resolución (HRSEM) con sensibilidad superficial. Además, la microscopía electrónica de transmisión y barrido (STEM) a bajos voltajes se ha demostrado como una técnica eficiente y rápida para evaluar el rendimiento del rellenado y la pureza del material. De hecho, la combinación de alta resolución espacial y el trabajo a bajos voltajes de esta técnica la ha hecho particularmente adecuada para el estudio de la interacción de nanotubos de carbono funcionales con muestras biológicas, como por ejemplo células. Algunos de los compuestos con interés para aplicaciones biomédicas empleados en este trabajo tienen una estructura laminar. Se sabe que los materiales laminares forman monocapas que pueden tener propiedades mejoradas o nuevas debido a efectos de confinamiento. Los CNT pueden actuar como plantillas para guiar los materiales laminares a formar nanotubos monocapa. Este es el caso de los haluros de lutecio y el yoduro de plomo. En esta tesis de doctorado hemos conseguido la formación de nanotubos de haluros de lutecio de tamaño subnanométrico, y su naturaleza tubular se ha demostrado mediante STEM con corrector de aberraciones y simulaciones de imagen. Además, se ha logrado el crecimiento con alto rendimiento de nanotubos de PbI2 en el exterior de CNTs. La estructura de los híbridos se ha revelado mediante STEM con aberración corregida y tomografía electrónica. Cabe destacar que las propiedades ópticas de los híbridos difieren de las del PbI2 en masa. El desplazamiento azul observado por fotoluminiscencia se ha confirmado mediante análisis en híbridos PbI2-CNT individuales por catodoluminiscencia-STEM. En conclusión, durante este proyecto de doctorado la gama de técnicas de microscopía electrónica utilizadas para el estudio de CNT funcionales se ha ampliado para obtener una caracterización exhaustiva de las muestras.
The present PhD thesis focuses on the thorough study of functional carbon nanotubes by means of electron microscopy techniques. Functional carbon nanotubes (CNTs) are attracting an increased attention due to their potential use for biomedical applications, including in vivo imaging, tumour targeting and drug delivery systems. An intrinsic advantage of carbon nanotubes is that their inner cavity can be filled with a chosen payload whilst the outer surface can be modified to improve their dispersability and biocompatibility. Being the envisaged application in the biomedical field, a detailed characterization of the samples in all the steps of the preparation process (namely purification, shortening, filling and external functionalization) is mandatory. To achieve this goal, in this PhD thesis we have employed already established analysis including high resolution transmission electron microscopy to study the structure of the filling material, or energy dispersive X-ray spectroscopy to assess their composition, but also we have explored the use of other techniques to expand the possibilities of characterization of the samples. In this sense, we have optimized the conditions for the study of the lengths of as-purified single-walled CNTs by surface sensitive high resolution scanning electron microscopy (HRSEM). Besides, low voltage scanning transmission electron microscopy (STEM) has been demonstrated as a time-efficient technique for assessment of filling yield and purity. Indeed, the combination of high spatial resolution and low voltage operation of this technique has made it particularly suitable for the study of the interaction of functional carbon nanotubes with biological samples such as cells. Some of the employed compounds with interest for biomedical applications have a layered structure in their bulk form. Layered materials are known to form monolayers which may exert enhanced or novel properties due to the confinement effects. CNTs may act as templates to guide those layered materials to form single-layered nanotubes. This is the case of lutetium halides and lead iodide. In this PhD thesis we have succeeded in the formation of lutetium halide subnanometer-sized nanotubes, and proved their tubular nature by aberration corrected STEM and image simulations. Additionally, the high yield growth of PbI2 nanotubes on the exterior of CNTs has been achieved. Thanks to aberration corrected HAADF STEM and electron tomography, the structure of the hybrids has been revealed. Remarkably, the optical properties of the hybrids differ from those of the bulk PbI2. The blue shift observed by photoluminescence has been further confirmed by cathodoluminescence STEM analysis detected on individual PbI2-CNT hybrids. In conclusion, during this PhD project the range of electron microscopy techniques used for the study of functional CNTs has been expanded to get a thorough characterisation of the samples.
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Fifield, Leonard S. "Functional materials based on carbon nanotubes : carbon nanotube actuators and noncovalent carbon nanotube modification /." Thesis, Connect to this title online; UW restricted, 2003. http://hdl.handle.net/1773/11560.

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Maestro, Luis Fernando. "Aperfeiçoamentos na obtenção de nanotubos de carbono com paredes simples (NTCPS) e possíveis aplicações na estocagem de energia." [s.n.], 2005. http://repositorio.unicamp.br/jspui/handle/REPOSIP/277457.

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Orientador: Carlos Alberto Luengo
Dissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Fisica Gleb Wataghin
Made available in DSpace on 2018-08-04T03:18:18Z (GMT). No. of bitstreams: 1 Maestro_LuisFernando_M.pdf: 1958027 bytes, checksum: cb56dc89c2faea48a95f3fa1350d5666 (MD5) Previous issue date: 2005
Resumo: Desde a sua descoberta em 1991, os Nanotubos de Carbono (NTC) têm atraído muito a atenção da comunidade científica, devido as suas propriedades. Neste trabalho é apresentada uma breve revisão das pesquisas em NTC e algumas definições básicas relevantes para a sua estrutura e propriedades. Em vista da utilização deste material em uma futura aplicação e devido ao interesse do grupo na área de energia, é apresentado o estado da arte do armazenamento de Hidrogênio e, em particular, no armazenamento em sólidos de grande área superficial, classe a qual os NTC pertencem. Apresentam-se as modificações realizadas em um Reator de Arco Elétrico (Forar II) para se realizar a Síntese de NTC, são relatadas as experiências e a caracterização das amostras obtidas utilizando-se Microscopia Eletrônica de Varredura e Espectroscopia Raman.
Abstract: Since their discovery in 1991 Carbon Nanotubes (CNT) have received increasing attention by the scientific community due to their properties. Here is presented a brief review of ongoing CNT research, and basic definitions useful to understand their structure and significant properties. Because of future applications in the energy area, are presented developments in Hydrogen storage, more specifically its adsorption in solids with large internal surface areas, a characteristic of CNT materials. Modifications of the existing FORAR II to obtain CNT by the electric arc method are presented, and a description of the routines employed to obtain CNT. The characterization of catalysts and CNT by Scanning Electron Microscopy and Raman Spectroscopy are presented and discussed.
Mestrado
Física da Matéria Condensada
Mestre em Física
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Martinčić, Markus. "Encapsulation of inorganic payloads into carbon nanotubes with potential application in therapy and diagnosis." Doctoral thesis, Universitat Autònoma de Barcelona, 2017. http://hdl.handle.net/10803/458136.

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Los nanotubos de carbono representan un grupo de materiales relativamente nuevo con potencial aplicación en diferentes áreas científicas. Esta tesis se centra en beneficiarse de sus cavidades internas para encapsular compuestos biomédicamente relevantes. Los nanotubos de carbono permiten el confinamiento de materiales en su interior impidiendo su fuga y, en consecuencia, reduciendo los efectos secundarios, no deseados, de estos materiales en el medio circundante. Esto hace que los nanotubos de carbono sean unos vectores elegantes para el diagnóstico y tratamiento de enfermedades. Se ha demostrado que el proceso utilizado para purificar muestras de nanotubos de carbono permite no sólo la reducción de impurezas, que podrían causar citotoxicidad, sino también acortar la longitud de los nanotubos. Teniendo en cuenta que el análisis termogravimétrico es una técnica ampliamente utilizada para evaluar la pureza de muestras de nanotubos de carbono, se ha investigado la influencia que tienen diferentes parámetros que controlan este análisis para asegurar que los resultados obtenidos son lo más precisos y representativos posible. El proceso de purificación también ha sido reajustado para minimizar la cantidad de catalizador en muestras de nanotubos de carbono. También hemos desarrollado un protocolo que permite determinar el contenido de catalizador en muestras de nanotubos de carbono mediante espectroscopía ultravioleta-visible de una manera precisa y fiable. Se ha investigado la preparación de cloruro de samario(III) anhidro a partir de óxido de samario(III), así como la capacidad que ofrece el material preparado para el llenado de nanotubos de carbono, ya que éste tiene interés para el desarrollo de radiotrazadores. El proceso de llenado de nanotubos de carbono resulta en muestras que contienen grandes cantidades de material externo, no encapsulado, lo cual puede comprometer el rendimiento del material en el contexto biológico. Hemos desarrollado un protocolo para monitorizar la eliminación del material no encapsulado a través de espectroscopía de ultravioleta-visible, que a la vez permite mejorar el procedimiento de lavado. El uso de nanotubos de carbono multicapa tiene algunos beneficios sobre sus homólogos monocapa debido a la presencia de una cavidad interna más grande que puede contener más material. Se ha investigado el cierre espontáneo de las puntas de nanotubos de carbono multicapa a través de su calentamiento térmico a diferentes temperaturas, así como la encapsulación de distintos materiales en el mismo rango de temperaturas. Finalmente, distintas muestras de nanotubos de carbono multicapa llenos han sido examinadas in-vitro con el fin de evaluar su citotoxicidad y la captación celular de los nanosistemas desarrollados.
Carbon nanotubes present a relatively novel group of materials with potential application in different scientific fields. The scope of this Thesis is to benefit from their inner cavities to encapsulate biomedically relevant payloads. Carbon nanotubes allow the confinement of selected materials within their walls, preventing their leakage and, as a consequence, undesired effects of such materials to the surrounding media. This makes filled carbon nanotubes very elegant vectors for the diagnosis and therapy of diseases. The process used to purify samples of carbon nanotubes proved to be a valuable asset, not only in the reduction of impurities which might cause cytotoxicity, but also for shortening the length of nanotubes. Thermogravimetric analysis is a widely-used technique in evaluating the purity of carbon nanotube samples. The role of different parameters that control the analysis has been investigated to assure that the most appropriate and representative results are obtained. The purification process has also been readjusted to assure the presence of the lowest amount of catalyst possible in the carbon nanotube samples with the employed purification strategy. We have also introduced a simple UV-Vis spectrophotometric assertion of the catalyst content in samples of nanotubes in a precise and reliable manner. The preparation of dry samarium(III) chloride from samarium(III) oxide was investigated, together with the nanotube filling-ability of the prepared material, of interest for the development of radiotracers. Bulk filling of carbon nanotubes results in samples that contain a large amount of external, non-encapsulated material, which can compromise the performance of the material in the biological context. We have developed a protocol to monitor the removal of the non-encapsulated material by means of UV-Vis, which in turn allows improving the washing procedure. The usage of multi-walled carbon nanotubes has some benefits over their single-walled counterparts, due to the presence of a bigger cavity which can host more material. The spontaneous closure of the tips of multi-walled carbon nanotubes by thermal annealing was investigated at different temperatures, along with the encapsulation of different materials. The prepared filled multi-walled samples were tested in-vitro to assess cytotoxicity and cellular uptake of the developed nanosystems.
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Amanatidis, Ilias. "Carbon Nanotubes and Carbon Nanomotors." Thesis, Lancaster University, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.524723.

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Durán, Valdeiglesias Elena. "Study of optical and optoelectronic devices based on carbon nanotubes." Thesis, Université Paris-Saclay (ComUE), 2019. http://www.theses.fr/2019SACLS100/document.

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La photonique silicium est reconnue comme la technologie à même de répondre aux nouveaux défis des interconnexions optiques. Néanmoins, la photonique silicium doit faire face à d'importants défis. En effet, le Si ne peux pas émettre ou détecter de la lumière dans la plage de longueurs d'onde des télécom (1,3 µm à 1,5 µm). Par conséquent, les sources et les détecteurs sont mis en œuvre avec du Ge et des matériaux III-V. Cette approche multi-matériaux complique la fabrication des dispositifs et augmente le coût final du circuit. Cependant, les nanomatériaux ont été identifiés comme alternative pour la mise en œuvre d’émetteurs-récepteurs moins chers et plus petits.Cette thèse est dédiée à l'étude et au développement de dispositifs optiques et optoélectroniques sur la plateforme photonique silicium basés sur l’utilisation de nanotubes de carbone mono paroi (SWCNT). L’objectif principal est de démontrer les blocs fonctionnels de base qui ouvriront la voie à une nouvelle technologie photonique dans laquelle les propietés actives proviennent des nanotubes de carbone.Les nanotubes de carbone ont été étudiés comme matériaux pour la nanoélectronique avec la démonstration de transistors ultra-compacts à hautes performances. De plus, les SWCNTs semi-conducteurs (s-SWCNTs) sont également des matériaux très intéressants pour la photonique. Les s-SWCNTs présentent une bande interdite directe qui peut être ajustée dans la gamme de longueurs d'onde du proche infrarouge en choisissant le bon diamètre. Les s-SWCNT présentent une photoluminescence et une électroluminescence, pouvant être exploitées pour la mise en œuvre de sources de lumière. Ils présentent également diverses bandes d’absorption pour la réalisation de photodétecteurs. Ces propriétés font que les nanotubes de carbone sont des candidats très prometteurs pour le développement de dispositifs optoélectroniques pour la photonique.Le premier objectif de la thèse était l'optimisation des solutions de nanotubes de carbone. Une technique de tri par ultra-centrifugation assistée par polymère a été optimisée, donnant des solutions de haute pureté en s-SWCNT. Sur cette base, plusieurs solutions de s-SWCNTs ont été élaborées pour obtenir des SWCNTs émettant dans les longueurs d'onde comprise entre 1µm et 1,6µm.Le deuxième objectif était d’étudier l'interaction des s-SWCNT avec des guides d'onde silicium et des résonateurs optiques. Plusieurs géométries ont été étudiées dans le but de maximiser l'interaction des s-SWCNT avec le mode optique en exploitant la composante transverse du champ électrique. D'autre part, une approche alternative a été proposée et démontrée en utilisant la composante longitudinale du champ électrique. En utilisant la composante longitudinale, une amélioration de la photoluminescence, un seuil d’émission avec la puissance de pompe ainsi qu’un rétrécissement de la largeur spectrale des résonances dans les microdisques ont été observés. Ces résultats sont un premier pas très prometteur vers la démonstration d’un laser intégré à base de SWNTs.Le troisième objectif était d'étudier les dispositifs optoélectroniques à base de s-SWCNTs. Plus spécifiquement, une diode électroluminescente (DEL) et un photodétecteur ont été développés, permettant la démonstration du premier lien optoélectronique sur puce basé sur les s-SWCNT.Le dernier objectif de la thèse était d'explorer le potentiel de s-SWCNT pour l’optique non linéaire. Il a été démontré expérimentalement, qu’en choisissant la chiralité des s-SWCNTs, le signe du coefficient Kerr pouvait être soit positif ou négatif. Cette capacité unique ouvre un nouveau degré de liberté pour contrôler les effets non linéaires sur puce, permettant de compenser ou d'améliorer les effets non linéaires pour des applications variées
Silicon photonics is widely recognized as an enabling technology for next generation optical interconnects. Nevertheless, silicon photonics has to address some important challenges. Si cannot provide efficient light emission or detection in telecommunication wavelength range (1.3μm-1.5μm). Thus sources and detectors are implemented with Ge and III-V compounds. This multi-material approach complicates device fabrication, offsetting the low-cost of Si photonics. Nanomaterials are a promising alternative route for the implementation of faster, cheaper, and smaller transceivers for datacom applications.This thesis is dedicated to the development of active silicon photonics devices based on single wall carbon nanotubes (SWCNTs). The main goal is to implement the basic building blocks that will pave the route towards a new Si photonics technology where all active devices are implemented with the same technological process based on a low-cost carbon-based material, i.e. SWCNT.Indeed, carbon nanotubes are an interesting solution for nanoelectronics, where they provide high-performance transistors. Semiconducting SWCNT exhibit a direct bandgap that can be tuned all along the near infrared wavelength range just by choosing the right tube diameter. s-SWCNTs provide room-temperature photo- and electro- luminescence and have been demonstrated to yield intrinsic gain, making them an appealing material for the implementation of sources. SWCNTs also present various absorption bands, allowing the realization of photodetectors.The first objective of this thesis was the optimization of the purity of s-SWCNT solutions. A polymer-sorting technique has been developed and optimized, yielding high-purity s-SWCNT solutions. Based on this technique, several solutions have been obtained yielding emission between 1µm and 1.6µm wavelengths.The second objective was the demonstration of efficient interaction of s-SWCNT with silicon photonics structures. Different geometries have been theoretically and experimentally studied, aiming at maximizing the interaction of s-SWCNT with optical modes, exploiting the electric field component transversal to light propagation. An alternative approach to maximize the interaction of s-SWCNT and the longitudinal electric field component of waveguide modes was proposed. Both, a power emission threshold and a linewidth narrowing were observed in several micro disk resonators. These results are a very promising first step to go towards the demonstration of an integrated laser based on CNTs.The third objective was to study optoelectronic SWCNT devices. More specifically, on-chip light emitting diode (LED) and photodetector have been developed, allowing the demonstration of the first optoelectronic link based on s-SWCNT. s-SWCNT-based LED and photodetector were integrated onto a silicon nitride waveguide connecting them and forming an optical link. First photodetectors exhibited a responsivity of 0.1 mA/W, while the complete link yielded photocurrents of 1 nA/V.The last objective of the thesis was to explore the nonlinear properties of s-SWCNT integrated on silicon nitride waveguides. Here, it has been experimentally shown, for the first time, that by choosing the proper s-SWCNT chirality, the sign of the nonlinear Kerr coefficient of hybrid waveguide can be positive or negative. This unique tuning capability opens a new degree of freedom to control nonlinear effects on chip, enabling to compensate or enhancing nonlinear effects for different applications
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Casanova, Cháfer Juan. "Gas Sensing with Modified Carbon Nanotubes, Graphene and Diamondoids." Doctoral thesis, Universitat Rovira i Virgili, 2020. http://hdl.handle.net/10803/669791.

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Aquesta tesi està centrada en el desenvolupament de diferents sensors de gasos mitjançant la modificació de nanomaterials de carboni. Concretament, al llarg d’aquest treball s’han modificat nanotubs de carboni (CNT), grafè i nanodiamants, amb diferents aproximacions. Per exemple, s’ha procedit a la seva decoració amb nanopartícules d’òxids metàl·lics, la formació de monocapes auto-assemblades o la seva funcionalització amb diferents molècules o àtoms, entre altres estratègies. Malgrat que els nanomaterials de carboni presenten extraordinàries propietats electròniques, fisico-químiques, i mecàniques, encara no s’han pogut desenvolupar sensors a escala comercial basats en el seu ús. Açò és a causa de problemes intrínsecs en la detecció de molècules gasoses, com per exemple la seva baixa especificitat i limitada reactivitat. Per tant, en aquesta tesi s’han desenvolupat diversos sensors modificant els diferents nanomaterials de carboni amb la finalitat de millorar paràmetres clau en el sensat de gasos, com poden ser la selectivitat, sensibilitat i temps de resposta. A més a més, s’ha dut a terme una exhaustiva caracterització dels nous nanomaterials desenvolupats mitjançant tècniques espectroscòpiques i microscòpiques. Així mateix, s’han proposat detallats mecanismes de sensat, és a dir, s’han estudiat les interaccions fisico-químiques entre els nanomaterials i els gasos. Per tant, aquest treball ofereix una visió integral per al desenvolupament de nous sensors, des del seu disseny i caracterització, fins als seus principis de funcionament a escala atòmica. A més a més, considerant les inquietuds de la nostra societat, els sensors desenvolupats solen treballar a temperatura ambient, amb la conseqüent dràstica reducció del consum energètic. Com a conclusió, els nanomaterials de carboni desenvolupats són capaços de detectar gasos tòxics, com per exemple el diòxid de nitrogen, a concentracions traça, molt per sota dels límits establerts per la legislació.
Esta tesis está centrada en el desarrollo de distintos sensores de gases mediante la modificación de nanomateriales de carbono. Concretamente, a lo largo de este trabajo se han modificado nanotubos de carbono (CNT), grafeno y nanodiamantes, con distintas aproximaciones. Por ejemplo, se ha procedido a su decoración con nanopartículas de óxidos metálicos, la formación de monocapas autoensambladas o su funcionalización con distintas moléculas o átomos, entre otras estrategias. A pesar de las extraordinarias propiedades electrónicas, físico-químicas y mecánicas de los nanomateriales de carbono, todavía no se han podido desarrollar sensores a nivel comercial basados en su uso. Esto es debido a sus problemas intrínsecos en la detección de moléculas gaseosas, como por ejemplo su baja especificidad y limitada reactividad. Por tanto, en esta tesis se han desarrollado diversos sensores modificando los nanomateriales de carbono con la finalidad de mejorar parámetros clave en la monitorización de gases, como puede ser la selectividad, sensibilidad y tiempos de respuesta. Además, se ha llevado a cabo una exhaustiva caracterización de los nuevos nanomateriales desarrollados mediante técnicas espectroscópicas y microscópicas. Asimismo, se han propuesto detallados mecanismos de detección, es decir, se han estudiado las interacciones físico-químicas entre los nanomateriales y los gases. Por tanto, este trabajo ofrece una visión integral para el desarrollo de nuevos sensores, desde su diseño y caracterización, hasta sus principios de funcionamiento a nivel atómico. Además, considerando las inquietudes de nuestra sociedad, los sensores desarrollados suelen trabajar a temperatura ambiente, con la consiguiente drástica reducción del consumo energético. Como conclusión, los nanomateriales de carbono desarrollados son capaces de detectar gases tóxicos, como por ejemplo el dióxido de nitrógeno, a concentraciones traza, muy por debajo de los límites establecidos por la legislación.
This thesis focuses in the development of different gas sensors through the modification of carbon nanomaterials. In particular, we employed carbon nanotubes (CNT), graphene and diamondoids, with different approaches. For instance, these nanomaterials were either decorated with metal oxide nanoparticles, modified of self-assembled monolayers of thiols or functionalized with different molecules or atoms, among other strategies. Despite the outstanding properties of carbon nanomaterials, such as their electronic, physicochemical and mechanical properties, it has not been possible so far to develop commercial sensors based on these nanomaterials. The main reason is derived from their inherent problems in the gas molecule detection process, such as low specificity and limited reactivity. Thus, we developed new gas sensors by modifying carbon nanomaterials to improve essential gas sensing parameters, such as selectivity, sensitivity and response time. Furthermore, an exhaustive material characterization was carried out through spectroscopic and microscopic techniques. Also, detailed gas sensing mechanisms were proposed, ergo, the physicochemical interactions between nanomaterials and gases were studied. In consequence, this thesis provides a comprehensive vision for the development of new gas sensors employing carbon nanomaterials, from their design and characterization to their working principles at to the atomic scale. In consideration of the social concerns, the sensors developed usually work at room temperature. Therefore, the device power-consumption was drastically reduced. In summary, the modified carbon nanomaterials employed in this thesis can detect harmful gases, such as nitrogen dioxide, at trace concentration, even at lower levels than those established by law as threshold limit values.
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Willey, Anthony D. "Thin Films of Carbon Nanotubes and Nanotube/Polymer Composites." BYU ScholarsArchive, 2012. https://scholarsarchive.byu.edu/etd/3540.

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A method is described for ultrasonically spraying thin films of carbon nanotubes that have been suspended in organic solvents. Nanotubes were sonicated in N-Methyl-2-pyrrolidone or N-Cyclohexyl-2-pyrrolidone and then sprayed onto a heated substrate using an ultrasonic spray nozzle. The solvent quickly evaporated, leaving a thin film of randomly oriented nanotubes. Film thickness was controlled by the spray time and ranged between 200-500 nm, with RMS roughness of about 40 nm. Also described is a method for creating thin (300 nm) conductive freestanding nanotube/polymer composite films by infiltrating sprayed nanotube films with polyimide.
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Sippel-Oakley, Jennifer A. "Charge induced actuation in carbon nanotubes and resistance changes in carbon nanotube networks." [Gainesville, Fla.] : University of Florida, 2005. http://purl.fcla.edu/fcla/etd/UFE0010052.

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Books on the topic "Nanotubes of carbon"

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Jorio, Ado, Gene Dresselhaus, and Mildred S. Dresselhaus, eds. Carbon Nanotubes. Berlin, Heidelberg: Springer Berlin Heidelberg, 2008. http://dx.doi.org/10.1007/978-3-540-72865-8.

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Balasubramanian, Kannan, and Marko Burghard, eds. Carbon Nanotubes. Totowa, NJ: Humana Press, 2010. http://dx.doi.org/10.1007/978-1-60761-579-8.

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Popov, Valentin N., and Philippe Lambin, eds. Carbon Nanotubes. Dordrecht: Springer Netherlands, 2006. http://dx.doi.org/10.1007/1-4020-4574-3.

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Dresselhaus, Mildred S., Gene Dresselhaus, and Phaedon Avouris, eds. Carbon Nanotubes. Berlin, Heidelberg: Springer Berlin Heidelberg, 2001. http://dx.doi.org/10.1007/3-540-39947-x.

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Ren, Zhifeng, Yucheng Lan, and Yang Wang. Aligned Carbon Nanotubes. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-30490-3.

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Monthioux, Marc, ed. Carbon Meta-Nanotubes. Chichester, UK: John Wiley & Sons, Ltd, 2011. http://dx.doi.org/10.1002/9781119954743.

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Chen, Changxin, and Yafei Zhang. Nanowelded Carbon Nanotubes. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-642-01499-4.

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Loiseau, Annick, Pascale Launois, Pierre Petit, Stephan Roche, and Jean-Paul Salvetat, eds. Understanding Carbon Nanotubes. Berlin, Heidelberg: Springer Berlin Heidelberg, 2006. http://dx.doi.org/10.1007/b10971390.

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Kumar, Rakesh, and Kumar Rakesh. Carbon nanotubes: Technology & applications. Noida: Nano Science & Technology Consortium, 2008.

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Somani, Prakash R., and M. Umeno. Carbon nanotubes: Multifunctional materials. Pune: Applied Science Innovations, 2009.

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Book chapters on the topic "Nanotubes of carbon"

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Vaccari, Lisa, Dimitrios Tasis, Andrea Goldoni, and Maurizio Prato. "Carbon Nanotubes." In Nanostructures - Fabrication and Analysis, 151–215. Berlin, Heidelberg: Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-37578-4_5.

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Zhou, Ruhong. "Carbon Nanotubes." In Modeling of Nanotoxicity, 45–59. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-15382-7_3.

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Ong, Yit Thai, Kian Fei Yee, Qian Wen Yeang, Sharif Hussein Sharif Zein, and Soon Huat Tan. "Carbon Nanotubes." In Nanomaterials for Environmental Protection, 125–42. Hoboken, NJ: John Wiley & Sons, Inc, 2014. http://dx.doi.org/10.1002/9781118845530.ch8.

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Chwał, Małgorzata. "Carbon Nanotubes." In Encyclopedia of Continuum Mechanics, 248–57. Berlin, Heidelberg: Springer Berlin Heidelberg, 2020. http://dx.doi.org/10.1007/978-3-662-55771-6_212.

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Salazar-Bloise, Félix. "Carbon Nanotubes." In Transparent Conductive Materials, 133–64. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2018. http://dx.doi.org/10.1002/9783527804603.ch3_1.

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Jacoboni, Carlo. "Carbon Nanotubes." In Theory of Electron Transport in Semiconductors, 389–400. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-10586-9_20.

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Rahmandoust, Moones, and Majid R. Ayatollahi. "Carbon Nanotubes." In Advanced Structured Materials, 5–63. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-00251-4_2.

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Peroulis, Dimitrios, Prashant R. Waghmare, Sushanta K. Mitra, Supone Manakasettharn, J. Ashley Taylor, Tom N. Krupenkin, Wenguang Zhu, et al. "Carbon Nanotubes." In Encyclopedia of Nanotechnology, 392. Dordrecht: Springer Netherlands, 2012. http://dx.doi.org/10.1007/978-90-481-9751-4_100100.

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Peroulis, Dimitrios, Prashant R. Waghmare, Sushanta K. Mitra, Supone Manakasettharn, J. Ashley Taylor, Tom N. Krupenkin, Wenguang Zhu, et al. "Carbon-Nanotubes." In Encyclopedia of Nanotechnology, 403. Dordrecht: Springer Netherlands, 2012. http://dx.doi.org/10.1007/978-90-481-9751-4_100107.

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Smith, Brian W., and David E. Luzzi. "Carbon Nanotubes." In Introduction to Nanoscale Science and Technology, 137–82. Boston, MA: Springer US, 2004. http://dx.doi.org/10.1007/1-4020-7757-2_7.

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Conference papers on the topic "Nanotubes of carbon"

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Sun, Xuekun, and Youqi Wang. "Mechanical Properties of Carbon Nanotubes." In ASME 2002 International Mechanical Engineering Congress and Exposition. ASMEDC, 2002. http://dx.doi.org/10.1115/imece2002-39484.

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Nano-scale finite element approach was used to predict the mechanical properties of carbon nanotubes. The unit-cell isolation scheme was same as that from Eric Seather [1], and nothing was assumed to exist inside any nanotube. Arm-chair, zigzag and chiral type of nanotubes with different radii were discussed in detail. The longitudinal modulus of nanotubes Ez was found to decrease with increasing nanotube radius, but to be independent of nanotube helicity. The modulus was not over 0.5 TPa for any case. Meanwhile, Poisson’s ratio νzθ was also predicted.
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Baik, Seunghyun, Byeongsoo Lim, Bumjoon Kim, Untae Sim, Seyoung Oh, Byung-Ho Sung, Jee-Hoon Choi, and Chul-Ju Kim. "Characterization of Mechanical Properties of Carbon Nanotubes in Copper-Matrix Nanocomposites." In ASME 2006 International Mechanical Engineering Congress and Exposition. ASMEDC, 2006. http://dx.doi.org/10.1115/imece2006-14224.

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Carbon nanotubes have received considerable attention because of their excellent mechanical properties. In this study, carbon nanotube - copper composites have been sintered by a mechanical mixing process. The interfacial bonding between nanotubes and the copper matrix was improved by coating nanotubes with nickel. Sintered pure copper samples were used as control materials. The displacement rate of nanotube-copper composites was found to increase at 200°C whereas that of nickel-coated nanotue-copper composites significantly decreased. The incorporation of carbon nanotubes and nickel-coated carbon nanotubes in the copper matrix decreased friction coefficients and increased the time up to the onset of scuffing compared with those of pure copper specimens.
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Cheng, Ji-Peng, and Xiao-Bin Zhang. "Helicity of Carbon Nanotubes and Helix-shaped Carbon Nanotubes." In 2006 1st IEEE International Conference on Nano/Micro Engineered and Molecular Systems. IEEE, 2006. http://dx.doi.org/10.1109/nems.2006.334825.

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Suhr, Jonghwan, Lijie Ci, Jae-Soon Jang, Victor Pushparaj, and Pulickel M. Ajayan. "Continuous Carbon Nanotube-PDMS Composites." In ASME 2008 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. ASMEDC, 2008. http://dx.doi.org/10.1115/smasis2008-521.

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Carbon nanotubes are considered short fibers and the nanotube reinforced composites are always analogues of randomly distributed short fiber composites. In contrast, the real structural fibrous composites often contain fiber reinforcements where fibers run continuously through the matrix material. With the recent advance in nanotube growth, vertical arrays of nanotubes in macroscopic lengths have become available and this allows the fabrication of continuous nano-composites that are similar to the continuous fiber composites utilizing the nanotube arrays as the continuous reinforcement in the composites. This provides a chance to take full advantage of the extreme high modulus and strength for the nanotubes in structural composites. Here, this study fabricates continuous nanotube reinforced polydimethylsiloxane (PDMS) composites and shows that under compressive loadings such continuous nanotube composites can generate dramatic increase in the longitudinal modulus and also significantly enhanced damping capability.
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El-Aguizy, T., and Sang-Gook Kim. "Large-Scale Assembly of Carbon Nanotubes." In ASME 2004 3rd Integrated Nanosystems Conference. ASMEDC, 2004. http://dx.doi.org/10.1115/nano2004-46021.

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The scale decomposition of a multi-scale system into small-scale order domains will reduce the complexity of the system and will subsequently ensure a success in nanomanufacturing. A novel method of assembling individual carbon nanotube has been developed based on the concept of scale decomposition. Current technologies for organized growth of carbon nanotubes are limited to very small-scale order. The nanopelleting concept is to overcome this limitation by embedding carbon nanotubes into micro-scale pellets that enable large-scale assembly as required. Manufacturing processes have been developed to produce nanopellets, which are then transplanted to locations where the functionalization of carbon nanotubes are required.
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Luchaninov, A. I., E. A. Medvedev, and S. R. Owaid. "Carbon nanotubes interference." In 2013 IX International Conference on Antenna Theory and Techniques (ICATT). IEEE, 2013. http://dx.doi.org/10.1109/icatt.2013.6650829.

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Dresselhaus, M. S. "Semiconducting Carbon Nanotubes." In PHYSICS OF SEMICONDUCTORS: 27th International Conference on the Physics of Semiconductors - ICPS-27. AIP, 2005. http://dx.doi.org/10.1063/1.1993991.

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Kandadai, Madhuvanthi A. "Tethering Carbon Nanotubes." In ELECTRONIC PROPERTIES OF NOVEL NANOSTRUCTURES: XIX International Winterschool/Euroconference on Electronic Properties of Novel Materials. AIP, 2005. http://dx.doi.org/10.1063/1.2103856.

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Simon, Ferenc. "Heteronuclear carbon nanotubes." In ELECTRONIC PROPERTIES OF NOVEL NANOSTRUCTURES: XIX International Winterschool/Euroconference on Electronic Properties of Novel Materials. AIP, 2005. http://dx.doi.org/10.1063/1.2103871.

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Thakre, Piyush R., and Dimitris C. Lagoudas. "Multifunctional Multi-Scale Carbon-Fiber/Epoxy Matrix Composites Reinforced With Carbon Nanotubes." In ASME 2009 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. ASMEDC, 2009. http://dx.doi.org/10.1115/smasis2009-1483.

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Abstract:
In the present work, apart from developing a processing method for multi-scale laminates, characterization efforts are focused on finding longitudinal, transverse and in-plane shear modulus using flexure and in-plane shear testing of unidirectional, [0°]10, and multidirectional, [±45°]2s, laminates. A comparison of the above mentioned macroscale properties is presented for three types of composites, i.e., composites embedded with functionalized nanotubes, un-functionalized or pristine nanotubes and base composite without nanotubes. Classical laminate theory is used to model a representative laminate system. Transverse and longitudinal properties are presented and compared with experimental observations. Transmission and scanning electron microscopy is performed to study the nanotube dispersion and the morphology of fracture surfaces at different length scales.
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Reports on the topic "Nanotubes of carbon"

1

Fischer, John, E. CARBON NANOTUBES: PROPERTIES AND APPLICATIONS. Office of Scientific and Technical Information (OSTI), July 2009. http://dx.doi.org/10.2172/961519.

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Brus, Louis E. Metallic Carbon Nanotubes and Ag Nanocrystals. Office of Scientific and Technical Information (OSTI), March 2014. http://dx.doi.org/10.2172/1121887.

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Pavia Sanders, Adriana, and Greg O'Bryan. Covalent Surface Modifications of Carbon Nanotubes. Office of Scientific and Technical Information (OSTI), July 2017. http://dx.doi.org/10.2172/1373648.

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Whitaker, Craig, Jay R. Heckert, and Ian C. Uber. Synthesis of Amide Functionalized Carbon Nanotubes. Fort Belvoir, VA: Defense Technical Information Center, January 2007. http://dx.doi.org/10.21236/ada519137.

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Holmes, W., J. Hone, P. L. Richards, and A. Zettl. Transmittance of single wall carbon nanotubes. Office of Scientific and Technical Information (OSTI), July 2001. http://dx.doi.org/10.2172/841693.

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Goldhaber-Gordon, David. Manipulating Local Electronic Properties of Carbon Nanotubes. Fort Belvoir, VA: Defense Technical Information Center, July 2008. http://dx.doi.org/10.21236/ada486270.

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Krauss, Todd. Directing Photogenerated Charges Along Individual Carbon Nanotubes. Office of Scientific and Technical Information (OSTI), November 2020. http://dx.doi.org/10.2172/1706703.

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Kono, Junichiro. Spectroscopy of Many-Body Effects in Carbon Nanotubes. Fort Belvoir, VA: Defense Technical Information Center, May 2010. http://dx.doi.org/10.21236/ada533146.

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Freiman, Stephen, Jeffrey A. Fagan, Stephanie Hooker, Kalman B. Migler, Angela R. Hight Walker, and Ming Zheng, eds. Fourth NIST Workshop on Carbon Nanotubes: Chirality Measurements. Gaithersburg, MD: National Institute of Standards and Technology, January 2013. http://dx.doi.org/10.6028/nist.sp.1133.

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Resasco, Daniel E. Center for Applications of Single-Walled Carbon Nanotubes. Office of Scientific and Technical Information (OSTI), February 2008. http://dx.doi.org/10.2172/924034.

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