Dispersion Of Narrow Diameter Carbon Nanotubes For Optical Characterization

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Dispersion of Narrow Diameter Carbon Nanotubes for Optical Characterization

Author : Hemant M. Shah
Publisher :
ISBN 13 :
Total Pages : 122 pages
Book Rating : 4.:/5 (432 download)

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Book Synopsis Dispersion of Narrow Diameter Carbon Nanotubes for Optical Characterization by : Hemant M. Shah

Download or read book Dispersion of Narrow Diameter Carbon Nanotubes for Optical Characterization written by Hemant M. Shah and published by . This book was released on 2008 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt: Optical properties of carbon nanotubes have recently attracted considerable amount of attention. Due to there direct band gap material characteristic these and dimension of the order of nano meters they find potential applications in the field of nano photonics. Thus the optical study of carbon nanotubes is important for both fundamental research and for the next generation technical applications. In this thesis single walled carbon nanotubes were dispersed in various encapsulates such as surfactants, polymers, proteins etc to separate them individually and study there optical properties. The individually dispersed single walled carbon nanotubes displayed unique absorbance spectra. The optical absorption spectrum of a particular tube is expected to be dominated by a series of relatively sharp inter-band transitions, at energies associated with the van Hove singularities, the absorbance spectrum obtained on our samples were consistent with this expectation. Our samples also showed sharp photoluminescence peaks mostly from the semiconducting single walled carbon nanotubes. The detailed overlap of the absorbance spectra and photoluminescence spectra lead us to believe that our samples contain mainly individual tubes encapsulated in one of the surfactants or polymers. Thin film transistors (TFT) were made with a mesh of single walled carbon nanotubes as the active channel on top of a silicon/silicon oxide substrate, with silicon acting as a back gate and titanium/gold electrodes were evaporated on top of the nanotube film. Photocurrent properties of these thin films were investigated and they showed a huge change in the photocurrent in the presence and absence of the laser light. Thin films of carbon nanotubes were also deposited on rectangular silicon substrates and the influence of applied strain in the presence of laser light was investigated. These films showed a huge change in resistance on application of mechanical strain. Raman measurements were also performed on these thin films and the obtained radial breathing mode (RBM) data helped resolve the diameter of many single walled carbon nanotubes.

Noncovalent Functionalization of Carbon Nanotubes

Author : Claudia Backes
Publisher : Springer Science & Business Media
ISBN 13 : 3642275818
Total Pages : 215 pages
Book Rating : 4.6/5 (422 download)

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Book Synopsis Noncovalent Functionalization of Carbon Nanotubes by : Claudia Backes

Download or read book Noncovalent Functionalization of Carbon Nanotubes written by Claudia Backes and published by Springer Science & Business Media. This book was released on 2012-02-07 with total page 215 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this thesis, Claudia Backes guides the reader through her multidisciplinary research into the non-covalent functionalization of carbon nanotubes in water. Although one of the most remarkable materials of the 21st century, carbon nanotubes often have limited application because of their intrinsically low solubility and polydispersity. The author shows that rational surfactant design is a powerful tool for chemists because it can unmask the key to solubilization and allow us to tailor nanotube surface and optical properties in a fully reversible fashion. Aspects of organic, physical and analytical chemistry, as well as colloidal sciences are covered in this outstanding work which brings us one step closer to exploiting this super-material to its full potential.

Carbon nanotubes and graphene for photonic applications

Author : W.B. Cho
Publisher : Elsevier Inc. Chapters
ISBN 13 : 0128088230
Total Pages : 35 pages
Book Rating : 4.1/5 (28 download)

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Book Synopsis Carbon nanotubes and graphene for photonic applications by : W.B. Cho

Download or read book Carbon nanotubes and graphene for photonic applications written by W.B. Cho and published by Elsevier Inc. Chapters. This book was released on 2013-08-31 with total page 35 pages. Available in PDF, EPUB and Kindle. Book excerpt: Single-walled carbon nanotubes (SWCNTs) possessing outstanding linear and nonlinear optical properties are utilized as saturable absorbers (SAs) for passive mode-locking of different bulk solid-state lasers in a wide spectral range between 0.8 and 2μm. To overcome some of the limitations and drawbacks of currently available saturable absorbers, diverse carbon nanotubes and techniques for fabrication of single-walled carbon nanotube saturable absorbers (SWCNT-SAs) are investigated. In this chapter, we discuss various manufacturing procedures and essential characteristics of SWCNT-based passive mode-locking devices, and review recent demonstrations of passively mode-locked solid-state lasers employing different types of SWCNT-SAs.

Light Scattering Characterization of Carbon Nanotube Dispersions and Reinforcement of Polymer Composites

Author : Jian Zhao
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (768 download)

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Book Synopsis Light Scattering Characterization of Carbon Nanotube Dispersions and Reinforcement of Polymer Composites by : Jian Zhao

Download or read book Light Scattering Characterization of Carbon Nanotube Dispersions and Reinforcement of Polymer Composites written by Jian Zhao and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Dispersion and morphology of carbon nanotubes as well as enhancement for rubber reinforcement are studied. Several approaches including surfactant aids, functionalization and plasma treatment are used to assist dispersion. Several characterization methods are used to assess both the degree of dispersion and the level of reinforcement. Small angle light scattering is carried out as a primary tool to assess structure and dispersion of nanotubes treated through these approaches Stress-strain measurement and dynamic mechanical analysis are performed on elastomeric composites to study polymer reinforcement. These results are divided into five sections. The first section focuses on dispersion of untreated and acid-treated multi-walled carbon nanofibers (MWNF) suspended in water. Light scattering data provide the first insights into the mechanism by which surface treatment promotes dispersion. Both acid-treated and untreated nanofibers exhibit hierarchical morphology consisting of small-scale aggregates (bundles) that agglomerate to form fractal clusters that eventually precipitate. Although the morphology of the aggregates and agglomerates is nearly independent of surface treatment, their time evolution is quite different. Acid oxidation has little effect on bundle morphology. Rather acid treatment inhibits agglomeration of the bundles. The second section focuses on dispersion of the solubilized nanofibers. Light scattering data indicate that PEG-functionalized sample is dispersed at small rod-like bundle (side-by-side aggregate) level. Solubilization is achieved not by disrupting small-scale size-by-side bundles, but mainly by completely inhibiting large-scale agglomeration. The third section focuses on dispersion of plasma-treated carbon nanofibers. Comparison of untreated and plasma-treated nanofibers indicates that plasma treatment facilitates dispersion of nanofibers. The fourth section focuses on dispersion and structure of single-walled carbon nanotubes (SWNTs) and multi-walled nanofibers (MWNFs) suspended with surfactants. Disordered fractal network of "ropes" is observed for SWNTs whereas the MWNFs show rod-like character on large length scales. Sonication can produce either better dispersion or aggregation depending on the surfactants. The fifth section focuses on rubber reinforcement by MWNFs. The nanofiber-polyurethane composites show large Payne and Mullins effects. By adding various concentrations of nanofibers, both Young's modulus and the load at high strain increased. A carbon-black filled analogue shows much less enhancement.

Handbook Of Carbon Nanomaterials (Volumes 9-10)

Author : R Bruce Weisman
Publisher : World Scientific
ISBN 13 : 9813235470
Total Pages : 812 pages
Book Rating : 4.8/5 (132 download)

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Book Synopsis Handbook Of Carbon Nanomaterials (Volumes 9-10) by : R Bruce Weisman

Download or read book Handbook Of Carbon Nanomaterials (Volumes 9-10) written by R Bruce Weisman and published by World Scientific. This book was released on 2019-01-22 with total page 812 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume is a tribute to the career of Prof. Mildred Dresselhaus. It focuses on the optical properties and spectroscopy of single-wall carbon nanotubes. It contains chapters on diverse experimental and theoretical aspects of the field, written by internationally recognized experts. The volume serves as an important resource for researchers and students interested in carbon nanotubes.

Studies on Single Wall Carbon Nanotube and Polymer Composite Films and Fibers

Author : Xiefei Zhang
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (631 download)

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Book Synopsis Studies on Single Wall Carbon Nanotube and Polymer Composite Films and Fibers by : Xiefei Zhang

Download or read book Studies on Single Wall Carbon Nanotube and Polymer Composite Films and Fibers written by Xiefei Zhang and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Single wall carbon nanotubes (SWNT) have been extensively studied over the last decade due to their excellent comprehensive properties for a variety of applications. This study is focused on the applications of SWNTs as reinforcement for polymer matrices. Due to van der Waal interactions, SWNTs form bundles of about 30 nm diameters. In order to take full advantage of the SWNT mechanical properties, SWNT must exfoliate or at least disperse in small diameter bundle size. Optical microscopy and SEM only give qualitative information of dispersion. Quantitative characterization through TEM or AFM can be time consuming in order to get statistical result. In this study, simple method is developed to quantitatively estimate the size of SWNT bundle in dispersion based on the geometry controlled electrical percolation behavior. The SWNTs can be dispersed /exfoliated via PVP wrapped SWNT aqueous dispersion assisted by surfactants such as sodium dodycel sulfate. PVA / SWNT composite films prepared through PVP wrapped SWNTs exhibit improved mechanical properties as well as the evidence of load transfer from the polymer matrix to the SWNT as monitored by the Raman spectroscopy. SWNT can also be well dispersed into PVA/DMSO/H2O solution. Gel spinning of PVA/SWNT composite fiber has been successfully carried out with improved mechanical properties. Functionalized tubes can be used to enhance SWNT dispersion and exfoliation. Oxidation in strong acids is one method used for functionalizing nanotubes. SWNTs have been functionalized in nitric acid. The structure and properties of films (buckypaper) processed from nitric acid functionalized tubes have been studied exhibiting high tensile strength and high electrical conductivity. Nitric acid treatment results in selective degradation of the small diameter tubes.

Carbon nanotubes and graphene for photonic applications

Author : K. Matsuda
Publisher : Elsevier Inc. Chapters
ISBN 13 : 0128088184
Total Pages : 31 pages
Book Rating : 4.1/5 (28 download)

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Book Synopsis Carbon nanotubes and graphene for photonic applications by : K. Matsuda

Download or read book Carbon nanotubes and graphene for photonic applications written by K. Matsuda and published by Elsevier Inc. Chapters. This book was released on 2013-08-31 with total page 31 pages. Available in PDF, EPUB and Kindle. Book excerpt: The fundamental electronic states and optical properties of single-walled carbon nanotubes are briefly explained in this chapter. Moreover, the novel optical properties of carbon nanotubes revealed by advanced laser spectroscopy (single-nanotube spectroscopy and time-resolved spectroscopy) are introduced. Due to the enhanced Coulomb interaction, the optically generated electron-hole pair forms a strongly bound ‘exciton’ state, analogous to the hydrogen-like state in the carbon nanotubes. The striking features of excitons in the carbon nanotube, such as singlet-dark states and triplet states, which dominate the optical properties, are described in this chapter.

Carbon Nanotubes

Author : Stephanie Reich
Publisher : John Wiley & Sons
ISBN 13 : 3527618058
Total Pages : 224 pages
Book Rating : 4.5/5 (276 download)

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Book Synopsis Carbon Nanotubes by : Stephanie Reich

Download or read book Carbon Nanotubes written by Stephanie Reich and published by John Wiley & Sons. This book was released on 2008-09-26 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt: Carbon nanotubes are exceptionally interesting from a fundamental research point of view. Many concepts of one-dimensional physics have been verified experimentally such as electron and phonon confinement or the one-dimensional singularities in the density of states; other 1D signatures are still under debate, such as Luttinger-liquid behavior. Carbon nanotubes are chemically stable, mechanically very strong, and conduct electricity. For this reason, they open up new perspectives for various applications, such as nano-transistors in circuits, field-emission displays, artificial muscles, or added reinforcements in alloys. This text is an introduction to the physical concepts needed for investigating carbon nanotubes and other one-dimensional solid-state systems. Written for a wide scientific readership, each chapter consists of an instructive approach to the topic and sustainable ideas for solutions. The former is generally comprehensible for physicists and chemists, while the latter enable the reader to work towards the state of the art in that area. The book gives for the first time a combined theoretical and experimental description of topics like luminescence of carbon nanotubes, Raman scattering, or transport measurements. The theoretical concepts discussed range from the tight-binding approximation, which can be followed by pencil and paper, to first-principles simulations. We emphasize a comprehensive theoretical and experimental understanding of carbon nanotubes including - general concepts for one-dimensional systems - an introduction to the symmetry of nanotubes - textbook models of nanotubes as narrow cylinders - a combination of ab-initio calculations and experiments - luminescence excitation spectroscopy linked to Raman spectroscopy - an introduction to the 1D-transport properties of nanotubes - effects of bundling on the electronic and vibrational properties and - resonance Raman scattering in nanotubes.

Carbon nanotube networks and their application in flexible display technology

Author : Axel Schindler
Publisher : Cuvillier Verlag
ISBN 13 : 3736961316
Total Pages : 156 pages
Book Rating : 4.7/5 (369 download)

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Book Synopsis Carbon nanotube networks and their application in flexible display technology by : Axel Schindler

Download or read book Carbon nanotube networks and their application in flexible display technology written by Axel Schindler and published by Cuvillier Verlag. This book was released on 2019-12-19 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book describes the use of carbon nanotubes in form of randomly oriented networks in display technology. Carbon nanotubes can behave either like a metal or like a semiconductor and are used in this work as transparent conductive pixel electrodes as well as semiconducting channel in thin-film transistors. Monte-Carlo simulations examine more closely the percolation probabilities of metallic and semiconducting nanotubes. The experimental part covers methods to create stable surfactant suspensions from nanotube powders, simple and cost-effective low temperature deposition processes from liquid phase on glass and flexible plastic substrates and patterning procedures of the created films. Electrical and optical characterization gives insight on their performance. The realization of liquid crystal and OLED displays shows the compatibility of transparent carbon nanotube electrodes with production processes. Results of the semiconductor application are presented on a transistor level. The dependence of the transistor performance on the network density for both, mixed and highly semiconducting nanotubes is discussed.

Carbon Nanotubes and Graphene

Author : Kazuyoshi Tanaka
Publisher : Newnes
ISBN 13 : 0080982689
Total Pages : 458 pages
Book Rating : 4.0/5 (89 download)

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Book Synopsis Carbon Nanotubes and Graphene by : Kazuyoshi Tanaka

Download or read book Carbon Nanotubes and Graphene written by Kazuyoshi Tanaka and published by Newnes. This book was released on 2014-07-10 with total page 458 pages. Available in PDF, EPUB and Kindle. Book excerpt: Carbon Nanotubes and Graphene is a timely second edition of the original Science and Technology of Carbon Nanotubes. Updated to include expanded coverage of the preparation, purification, structural characterization, and common application areas of single- and multi-walled CNT structures, this work compares, contrasts, and, where appropriate, unitizes CNT to graphene. This much expanded second edition reference supports knowledge discovery, production of impactful carbon research, encourages transition between research fields, and aids the formation of emergent applications. New chapters encompass recent developments in the theoretical treatments of electronic and vibrational structures, and magnetic, optical, and electrical solid-state properties, providing a vital base to research. Current and potential applications of both materials, including the prospect for large-scale synthesis of graphene, biological structures, and flexible electronics, are also critically discussed. Updated discussion of properties, structure, and morphology of biological and flexible electronic applications aids fundamental knowledge discovery Innovative parallel focus on nanotubes and graphene enables you to learn from the successes and failures of, respectively, mature and emergent partner research disciplines High-quality figures and tables on physical and mathematical applications expertly summarize key information – essential if you need quick, critically relevant data

Carbon Nanotubes

Author : Siva Yellampalli
Publisher : BoD – Books on Demand
ISBN 13 : 9533074973
Total Pages : 532 pages
Book Rating : 4.5/5 (33 download)

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Book Synopsis Carbon Nanotubes by : Siva Yellampalli

Download or read book Carbon Nanotubes written by Siva Yellampalli and published by BoD – Books on Demand. This book was released on 2011-07-20 with total page 532 pages. Available in PDF, EPUB and Kindle. Book excerpt: Carbon nanotubes are one of the most intriguing new materials with extraordinary properties being discovered in the last decade. The unique structure of carbon nanotubes provides nanotubes with extraordinary mechanical and electrical properties. The outstanding properties that these materials possess have opened new interesting researches areas in nanoscience and nanotechnology. Although nanotubes are very promising in a wide variety of fields, application of individual nanotubes for large scale production has been limited. The main roadblocks, which hinder its use, are limited understanding of its synthesis and electrical properties which lead to difficulty in structure control, existence of impurities, and poor processability. This book makes an attempt to provide indepth study and analysis of various synthesis methods, processing techniques and characterization of carbon nanotubes that will lead to the increased applications of carbon nanotubes.

Fabrication and Optical and Electronic Characterization of Conjugated Polymer-Stabilized Semiconducting Single-Wall Carbon Nanotubes in Dispersions and Thin Films

Download Fabrication and Optical and Electronic Characterization of Conjugated Polymer-Stabilized Semiconducting Single-Wall Carbon Nanotubes in Dispersions and Thin Films PDF Online Free

Author : Imge Namal
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (14 download)

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Book Synopsis Fabrication and Optical and Electronic Characterization of Conjugated Polymer-Stabilized Semiconducting Single-Wall Carbon Nanotubes in Dispersions and Thin Films by : Imge Namal

Download or read book Fabrication and Optical and Electronic Characterization of Conjugated Polymer-Stabilized Semiconducting Single-Wall Carbon Nanotubes in Dispersions and Thin Films written by Imge Namal and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Handbook of Polymer Nanocomposites. Processing, Performance and Application

Author : Kamal K. Kar
Publisher : Springer
ISBN 13 : 3642452299
Total Pages : 603 pages
Book Rating : 4.6/5 (424 download)

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Book Synopsis Handbook of Polymer Nanocomposites. Processing, Performance and Application by : Kamal K. Kar

Download or read book Handbook of Polymer Nanocomposites. Processing, Performance and Application written by Kamal K. Kar and published by Springer. This book was released on 2014-12-01 with total page 603 pages. Available in PDF, EPUB and Kindle. Book excerpt: Volume B forms one volume of a Handbook about Polymer Nanocomposites. Volume B deals with Carbon nanotube based polymer composites. The preparation, architecture, characterisation, properties and application of polymer nanocomposites are discussed within some 25 chapters. Each chapter has been authored by experts in the respective field.

Physical Properties Of Carbon Nanotubes

Author : G Dresselhaus
Publisher : World Scientific
ISBN 13 : 1783262419
Total Pages : 273 pages
Book Rating : 4.7/5 (832 download)

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Book Synopsis Physical Properties Of Carbon Nanotubes by : G Dresselhaus

Download or read book Physical Properties Of Carbon Nanotubes written by G Dresselhaus and published by World Scientific. This book was released on 1998-07-22 with total page 273 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is an introductory textbook for graduate students and researchers from various fields of science who wish to learn about carbon nanotubes. The field is still at an early stage, and progress continues at a rapid rate. This book focuses on the basic principles behind the physical properties and gives the background necessary to understand the recent developments. Some useful computational source codes which generate coordinates for carbon nanotubes are also included in the appendix.

Optical Characterization of Carbon Nanotubes Using the Displacement Photocurrent Technique

Author : Aditya D. Mohite
Publisher :
ISBN 13 : 9780549052968
Total Pages : 135 pages
Book Rating : 4.0/5 (529 download)

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Book Synopsis Optical Characterization of Carbon Nanotubes Using the Displacement Photocurrent Technique by : Aditya D. Mohite

Download or read book Optical Characterization of Carbon Nanotubes Using the Displacement Photocurrent Technique written by Aditya D. Mohite and published by . This book was released on 2007 with total page 135 pages. Available in PDF, EPUB and Kindle. Book excerpt: Understanding the optical properties of nano materials is critical in the development of future optoelectronic devices. Along with the existing techniques used for characterization of these novel materials, it is also important to develop new techniques and methods which can provide a deeper insight into the optical and electrical properties.

Optical Characterization of 0.3nm Single-walled Carbon Nanotubes

Author : Yiu Yin Tong
Publisher :
ISBN 13 :
Total Pages : 100 pages
Book Rating : 4.:/5 (175 download)

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Book Synopsis Optical Characterization of 0.3nm Single-walled Carbon Nanotubes by : Yiu Yin Tong

Download or read book Optical Characterization of 0.3nm Single-walled Carbon Nanotubes written by Yiu Yin Tong and published by . This book was released on 2007 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Syntheses and Applications of Carbon Nanotubes and Their Composites

Author : Satoru Suzuki
Publisher : BoD – Books on Demand
ISBN 13 : 9535111256
Total Pages : 552 pages
Book Rating : 4.5/5 (351 download)

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Book Synopsis Syntheses and Applications of Carbon Nanotubes and Their Composites by : Satoru Suzuki

Download or read book Syntheses and Applications of Carbon Nanotubes and Their Composites written by Satoru Suzuki and published by BoD – Books on Demand. This book was released on 2013-05-09 with total page 552 pages. Available in PDF, EPUB and Kindle. Book excerpt: Carbon nanotubes are rolled up graphene sheets with a quasi-one-dimensional structure of nanometer-scale diameter. In these last twenty years, carbon nanotubes have attracted much attention from physicists, chemists, material scientists, and electronic device engineers, because of their excellent structural, electronic, optical, chemical and mechanical properties. More recently, demand for innovative industrial applications of carbon nanotubes is increasing. This book covers recent research topics regarding syntheses techniques of carbon nanotubes and nanotube-based composites, and their applications. The chapters in this book will be helpful to many students, engineers and researchers working in the field of carbon nanotubes.