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Ultra Low Frequency Raman Spectroscopy Of Single Walled Carbon Nanotubes And The Environmental Effects
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Book Synopsis Ultra-low Frequency Raman Spectroscopy of Single Walled Carbon Nanotubes and the Environmental Effects by : Yanting Shen
Download or read book Ultra-low Frequency Raman Spectroscopy of Single Walled Carbon Nanotubes and the Environmental Effects written by Yanting Shen and published by . This book was released on 2016 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Environmental Effects on the Ultra-low Frequency Raman Spectra of Single Walled Carbon Nanotubes by :
Download or read book Environmental Effects on the Ultra-low Frequency Raman Spectra of Single Walled Carbon Nanotubes written by and published by . This book was released on 2014 with total page 119 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Raman Spectroscopy of Single Wall Carbon Nanotubes by : HyungBin Son
Download or read book Raman Spectroscopy of Single Wall Carbon Nanotubes written by HyungBin Son and published by . This book was released on 2008 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt: A single wall carbon nanotube (SWNT) is a new form of carbon, whose atomic arrangement is equivalent to a graphene sheet rolled into a cylinder in a seamless way. The typical diameter of a SWNT ranges from 0.6 nm to several nm and the typical length ranges from tens of nm to several cm. Due to its small diameter and high aspect ratio, a SWNT has very unique electronic and vibrational properties. The goals of this thesis work are to design and construct a Raman instrument capable of obtaining signals from many different types of individual SWNTs, to develop methods and tools to collect, organize and analyze large amounts of Raman spectra from them, to use resonant Raman spectroscopy to characterize individual SWNTs, and to investigate how their electronic and vibrational properties change under various conditions, such as strain, or different substrate interactions. A high-efficiency widely-tunable Raman instrument is developed for the study of SWNTs. The environmental effects on the electronic and vibrational properties are investigated by suspended SWNTs. Using the high-efficiency Raman instrument, weak optical transitions of metallic SWNTs are found. The effect of strain on the vibrational mode frequencies of SWNTs are studied.
Book Synopsis A Spectroscopic Investigation Into the Low-frequency Raman Spectrum of Single Wall Carbon Nanotubes by : Michelle N. Galvin
Download or read book A Spectroscopic Investigation Into the Low-frequency Raman Spectrum of Single Wall Carbon Nanotubes written by Michelle N. Galvin and published by . This book was released on 2010 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Raman Spectroscopy of Double- and Triple-walled Carbon Nanotubes by : Jia Wern Hue
Download or read book Raman Spectroscopy of Double- and Triple-walled Carbon Nanotubes written by Jia Wern Hue and published by . This book was released on 2020 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt: A single-walled carbon nanotube (SWNT) is a graphene sheet rolled up into a tube. Double-walled (DWNT) and triple-walled carbon nanotubes (TWNT) are two and three coaxial SWNTs respectively. Isolated species of DWNTs and TWNTs were only recently probed and it can be considered as a new branch in carbon nanotube science. Phonons, and the combination of phonons and overtones are fundamental to understanding optical processes, transport and thermoelectricity in carbon nanotubes. To study these phonons, resonance Raman spectroscopy is employed on DWNT and TWNT bundles, as well as isolated TWNTs. The phonon modes of interest to this dissertation are the radial breathing mode (RBM), the G-band, and the M-band. From the RBM, it is learnt that for inner tubes with a tube diameter less than 1.2 nm, the curvature effects are dominant. Evidence for intertube interactions was found, although for outer tubes the environmental effects dominate. There was also evidence for commensurate and incommensurate tubes. Studying the G-band allowed for possible chiral indices to be identified for the middle and outer tubes of isolated TWNTs. In addition, the frequency shifts of TWNT G-band frequencies relative to SWNT G-band frequencies were studied and compared to TWNT G-band frequency shifts. As for the M-bands, phonon mode assignments for peaks between 1680 cm-1 to 1850 cm-1 were attempted.
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.
Book Synopsis Evaluations of Single Walled Carbon Nanotubes Using Resonance Raman Spectroscopy by : Victor Watson Brar
Download or read book Evaluations of Single Walled Carbon Nanotubes Using Resonance Raman Spectroscopy written by Victor Watson Brar and published by . This book was released on 2004 with total page 81 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work reports the results of two studies which use resonance Raman scattering to evaluate the vibrational properties of single walled carbon nanotubes (SWNTs). In the first study, we report an evaluation of second-order combination and over-tone modes in highly ordered pyrolytic graphite (HOPG), in SWNT bundles, and in isolated SWNTs. We found both dispersive and non-dispersive Raman bands in the range 1650-2100 cm−1, and we show that the appearance and frequency vs. laser energy E[laser] behavior of these features are in agreement with predictions from double resonance Raman theory. In the case of SWNTs, these second-order bands depend on the one-dimensional structure of SWNTs, and, at the single nanotube level, the spectra vary from tube to tube, depending on tube diameter and chirality, and on the energy of the van Hove singularity relative to E[laser]. In the second study, we present a theoretical method of predicting, to within a linear constant [beta], the frequency shift in the Raman features of a SWNT material as the Fermi level is changed by depletion or addition of electrons. This constant is then evaluated for different Raman modes in SWNTs by comparing theoretical predictions to experimental observations by Corio et al., where the Fermi level of SWNT bundles is raised by electrochemical doping and Raman spectra are collected in situ. It is determined that for the G-band of SWNTs, the dependence of frequency on Fermi energy is /[beta][sub]G = 271cm−1 per hole per C-atom for metallic SWNTs with d[sub]f [approximately]= 1.25 ± 0.20nm.
Book Synopsis Measurement Issues in Single Wall Carbon Nanotubes (Classic Reprint) by : Stephen Freiman
Download or read book Measurement Issues in Single Wall Carbon Nanotubes (Classic Reprint) written by Stephen Freiman and published by Forgotten Books. This book was released on 2017-10-28 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Measurement Issues in Single Wall Carbon Nanotubes Raman Spectroscopy Resonant Raman Scattering in Carbon Nanotubes raman-active Modes in Carbon Nanotubes (rem, D, G and G') Radial breathing mode (rbm) The G band Second Order Raman Scattering, the D and G' Modes (zone Boundary Phonons) Width of the Resonance Strength of the Ramén Signal; Electron - Phonon Coupling Depolarization and Selection Rules Practical Considerations Measurement Setup Laser Power Heating Effects Material Inhomogeneity Appendix Illustration of Aggregation Effects Illustration of Heating Effects Measurements from One Individual Nanotube nano-slit Effect. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Book Synopsis Near-field Raman Spectroscopy of Single-walled Carbon Nanotubes by : Neil Anderson
Download or read book Near-field Raman Spectroscopy of Single-walled Carbon Nanotubes written by Neil Anderson and published by . This book was released on 2007 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Low-temperature Raman Spectroscopy of 0.4 Nm Single-walled Carbon Nanotubes by : Siu Man Mok
Download or read book Low-temperature Raman Spectroscopy of 0.4 Nm Single-walled Carbon Nanotubes written by Siu Man Mok and published by . This book was released on 2004 with total page 302 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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
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.
Book Synopsis Raman Spectroscopy in Graphene Related Systems by : Ado Jorio
Download or read book Raman Spectroscopy in Graphene Related Systems written by Ado Jorio and published by John Wiley & Sons. This book was released on 2011-08-24 with total page 319 pages. Available in PDF, EPUB and Kindle. Book excerpt: Raman spectroscopy is the inelastic scattering of light by matter. Being highly sensitive to the physical and chemical properties of materials, as well as to environmental effects that change these properties, Raman spectroscopy is now evolving into one of the most important tools for nanoscience and nanotechnology. In contrast to usual microscopyrelated techniques, the advantages of using light for nanoscience relate to both experimental and fundamental aspects.
Book Synopsis Resonance Raman Spectroscopy of Single-walled Carbon Nanotubes by :
Download or read book Resonance Raman Spectroscopy of Single-walled Carbon Nanotubes written by and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: By Sandra Dawn Marie Brown.
Book Synopsis Raman Spectroscopy of Single Walled Carbon Nanotubes by :
Download or read book Raman Spectroscopy of Single Walled Carbon Nanotubes written by and published by . This book was released on 2014 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Effects of Substrate and Molecular Adsorption on Raman Scattering from Individual Single-walled Carbon Nanotubes by : Anshu Gaur
Download or read book Effects of Substrate and Molecular Adsorption on Raman Scattering from Individual Single-walled Carbon Nanotubes written by Anshu Gaur and published by ProQuest. This book was released on 2008 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt: In recent years, single-walled carbon nanotubes (SWCNTs) have become a material of significant interest for future electronic devices. Due to its all-surface-atom structure, properties of carbon nanotubes are highly sensitive to their ambient environment. Understanding carbon nanotubes' inherent properties and how these properties are affected by their environment is of utmost importance in order to realize their potential in devices. Although many studies report useful characteristics of CNT-based devices, underlying mechanism (e.g. changes due to inherent or external factors) often remain unclear or are not well understood.
Book Synopsis High Pressure Raman Spectroscopy of Single Walled Carbon Nanotubes by : John Edward Proctor
Download or read book High Pressure Raman Spectroscopy of Single Walled Carbon Nanotubes written by John Edward Proctor and published by . This book was released on 2007 with total page 147 pages. Available in PDF, EPUB and Kindle. Book excerpt:
