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Raman Spectroscopy Of Double Walled Carbon Nanotubes With Different Metallic And Semiconducting Configurations
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Book Synopsis Raman Spectroscopy of Double Walled Carbon Nanotubes with Different Metallic and Semiconducting Configurations by : Federico Villalpando Páez
Book Synopsis Resonance Raman Spectroscopy of Single-walled Carbon Nanotubes by : Sandra Dawn Marie Brown
Download or read book Resonance Raman Spectroscopy of Single-walled Carbon Nanotubes written by Sandra Dawn Marie Brown and published by . This book was released on 2000 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Carbon Nanotubes by : Giorgia Pastorin
Download or read book Carbon Nanotubes written by Giorgia Pastorin and published by CRC Press. This book was released on 2019-05-08 with total page 428 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book represents a critical evaluation of the most recent discoveries about carbon nanotubes and includes a cautious description of their impact on personal health and environmental pollution. It also offers an overview of the main research groups around the world which have been focusing their efforts on the exploitation of this intriguing material, with the purpose of inspiring young scientists to follow their pathway.
Book Synopsis Solubilization and Dispersion of Carbon Nanotubes by : Oxana Vasilievna Kharissova
Download or read book Solubilization and Dispersion of Carbon Nanotubes written by Oxana Vasilievna Kharissova and published by Springer. This book was released on 2017-09-01 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book describes a series of contemporary techniques and their combinations used for CNTs solubilization, from physical to chemical and biological, applying inorganic and organic compounds, as well as some metal complexes. In some cases, successive steps can be applied, for instance the use of low and high-weight surfactants, or mineral acid treatment for creation of –OH and –COOH groups and their further interaction with organic molecules. Each discussed method leads to an improvement of CNT solubility, frequently a considerable one. The formed dispersions can be stable for long periods of time, from several weeks to some months, and they sometimes even remain stable after centrifugation. Several special studies have been carried out in the areas of influence of solvent and light on CNTs dispersibility, combinations and abilities of surfactants, CNT cytotoxicity, etc. Applications of solubilized CNTs are discussed in this book as well.
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.
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 of Metallic Carbon Nanotubes by : Hootan Farhat
Download or read book Raman Spectroscopy of Metallic Carbon Nanotubes written by Hootan Farhat and published by . This book was released on 2010 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt: Metallic carbon nanotubes are one dimensional conductors that are both technologically promising for electronic applications, and scientifically interesting for studying the physics of low dimensional materials. In this thesis, we present a detailed study of the inelastic light scattering (Raman) spectrum of individual metallic carbon nanotubes, with a focus on the influence of electronic excitations and charged carriers. We have demonstrated that the frequency and linewidth of certain phonon modes of metallic carbon nanotubes depend strongly the Fermi energy, because they couple strongly to low lying electron hole pairs. Next, we report the first experimental observation of electronic Raman scattering in carbon nanotubes. This observation demonstrates that the same electron-hole pairs that participate in damping the optical phonons of metallic carbon nanotubes, may themselves scatter light, thus giving rise to an electronic Raman spectrum. An analysis of the Fermi level and laser energy dependence of the electronic Raman and phonon Raman contributions allows us to explain the asymmetric lineshape of the G-band phonon modes in terms of a Fano interference. In another experiment, we have shown that the charge-induced expansion and contraction of the the graphitic C-C bond length is different for metallic and semiconducting nanotubes. Finally, we have measured the Stokes and antiStokes intensities of the Raman modes in electrically contacted metallic nanotubes in order to determine their phonon populations during high-field electrical transport. The experiments reported here, have helped to clarify the origin of several features in the Raman spectra of metallic carbon nanotubes that have been heavily debated in recent years. These result also shed light on the way electronic excitations and charged carriers affect the physical properties of metallic carbon nanotubes.
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 2004-03-12 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nanoröhrchen aus Kohlenstoff werden hervorragende Eigenschaften nachgesagt: sie sind chemisch sehr stabil, mechanisch sehr fest und elektrisch leitend. Aufgrund dieses Charakters eröffnen sich Perspektiven für verschiedene Anwendungen: als Nanotransistoren in Schaltkreisen, als Wasserstoff-Speicher für Brennstoffzellen, als künstliche Muskeln oder als Zusatz zur Verstärkung von Verbundwerkstoffen. Vor allem in der Elektronik werden die fadenförmigen Makromolekülen aus Kohlenstoff eines Tages das Silizium verdrängen. Das vorliegende Buch ist eine Einführung in die Konzepte zur Behandlung und Untersuchung von Carbon Nanotubes für eine breite wissenschaftliche Leserschaft. Jedes Kapitel besteht aus einer edukativen Hinführung auf die Problematik sowie aus nachhaltigen Lösungskonzepten. Zum ersten Mal werden ab initio Rechnungen zur physikalischen Beschreibung von CNT vorgestellt und Ergebnisse aus neuen experimentellen Untersuchungsmethoden (STM, Raman) präsentiert.
Book Synopsis Handbook of Nanophysics by : Klaus D. Sattler
Download or read book Handbook of Nanophysics written by Klaus D. Sattler and published by CRC Press. This book was released on 2010-09-17 with total page 770 pages. Available in PDF, EPUB and Kindle. Book excerpt: Intensive research on fullerenes, nanoparticles, and quantum dots in the 1990s led to interest in nanotubes and nanowires in subsequent years. Handbook of Nanophysics: Nanotubes and Nanowires focuses on the fundamental physics and latest applications of these important nanoscale materials and structures. Each peer-reviewed chapter contains a broad-
Book Synopsis In Situ Raman Spectroscopy of the Type Selective Etching of Carbon Nanotubes and Their Growth from C60 Seeds by : Li-
Download or read book In Situ Raman Spectroscopy of the Type Selective Etching of Carbon Nanotubes and Their Growth from C60 Seeds written by Li- and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In situ Raman spectroscopy was used to explore etching of carbon nanotubes as well as their growth from C60. The thesis is in three parts: (1) C60 seed particles were partially oxidized in air and were used to grow carbon nanotubes and other nanocarbon structures. Seed oxidization was characterized by monitoring the evolution of the Raman Ag(2) peak and the D band, and oxidation temperature was found to be critical to nanotube growth. (2) To further explore oxidation, carbon nanotubes were thermally oxidized in air at different temperatures, while the evolution of different Raman bands was tracked. Etching dynamics and band intensity evolution were tracked in situ. Notably, metallic species were found to etch much more rapidly than semiconducting species of similar diameter. (3) To confirm and expand on this, a novel, simultaneous two-laser Raman spectroscopy setup was used to track the thermal oxidation of carbon nanotubes in O2 and CO2 gases at different temperatures. Metallic species were resonant with one laser line, while semiconducting species were resonant with the other, so changes to sample metallicity could be tracked unambiguously in two separate spectra. Again, metals were found to etch more rapidly. In situ Raman spectroscopy can track the evolution of nanotubes in real time and provide insight into processing. In general, detailed process monitoring like this can help in the development of selective synthesis and processing.
Book Synopsis Carbon Nanotubes: From Basic Research to Nanotechnology by : Valentin N. Popov
Download or read book Carbon Nanotubes: From Basic Research to Nanotechnology written by Valentin N. Popov and published by Springer Science & Business Media. This book was released on 2006-04-03 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book comprises reviews on various topics of carbon nanotube research from specialists in the field, together with reports on on-going research. Both are intended to give a detailed picture of the remarkable properties of these one-dimensional nanostructures. Particular attention is paid to the synthesis, characterization, properties, and application of nanotubes. The book will be an indispensable introduction for the newcomers in the field as well as a valuable update for researchers in the field, for it contains the most recent developments.
Book Synopsis In Situ Raman Spectroscopy of the Type Selective Etching of Carbon Nanotubes and Their Growth from C60 Seeds by : Andrew Li-Pook-Than
Download or read book In Situ Raman Spectroscopy of the Type Selective Etching of Carbon Nanotubes and Their Growth from C60 Seeds written by Andrew Li-Pook-Than and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Correlation Between Raman Spectroscopy and Electron Microscopy on Individual Carbon Nanotubes and Peapods by : Christian Spudat
Download or read book Correlation Between Raman Spectroscopy and Electron Microscopy on Individual Carbon Nanotubes and Peapods written by Christian Spudat and published by Forschungszentrum Jülich. This book was released on 2010 with total page 147 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 and graphene for photonic applications by : E. Gaufrès
Download or read book Carbon nanotubes and graphene for photonic applications written by E. Gaufrès and published by Elsevier Inc. Chapters. This book was released on 2013-08-31 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt: This chapter describes how the semiconducting-single-wall nanotube (SWNT) extraction affects their luminescence properties and how such properties can be exploited to fabricate optical sources emitting in near-infrared wavelengths ranging from 1 to 2μm. The main applications of carbon nanotube (CNT) lasers are aimed at optical interconnects and biophotonics. We review recent achievements in obtaining optical gain in thin films doped with CNTs. Techniques for determining optical gain in CNTs are considered with particular focus on the variable strip length (VSL) method and choices to integrate nanotubes in the optical waveguide are discussed.
Book Synopsis Raman Spectroscopy, Fullerenes and Nanotechnology by : Maher S. Amer
Download or read book Raman Spectroscopy, Fullerenes and Nanotechnology written by Maher S. Amer and published by Royal Society of Chemistry. This book was released on 2010 with total page 303 pages. Available in PDF, EPUB and Kindle. Book excerpt: This unique book is the first treatment of nanotechnology as the science controlled by the behaviour of thermodynamic small systems. It provides comprehensive discussions on fullerenes as building blocks, Raman spectroscopy as a powerful diagnostic tool, and nanotechnology as the technology bridging the gap between human-made and biological materials systems. Aimed at graduate students, scientists, researchers, and educators interested in academia, government and industry, the text is divided into four chapters. The first covers the potential of nanotechnology to develop a better, deeper understanding of the physical and chemical phenomena observed in natural systems. It also contains a section introducing nanotechnology to the public in simple, non-scientific terms. The second chapter is devoted to Raman spectroscopy and could in itself serve as a basis for a short course on its applications in materials science. The third section covers fullerenes and presents their history and development as well as discussing the structure and production of zero-dimensional, one-dimensional, and two-dimensional fullerenes. The fourth and final chapter serves as a correlation discussion and over view. It emphasizes the unique nano-phenomena exhibited by the fullerene systems as carbon based nanostructured systems. This chapter, and therefore the book, concludes with a discussion on the potential of nano-science and technology to shape the future of human society.
Book Synopsis Investigation of Doping and Photoexcitation in Carbon Nanotubes Using Raman Spectroscopy by : Abdul Waheed Anwar
Download or read book Investigation of Doping and Photoexcitation in Carbon Nanotubes Using Raman Spectroscopy written by Abdul Waheed Anwar and published by . This book was released on 2011 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt: Raman spectroscopy is a non-invasive characterization technique suitable for the study of carbon nanotubes. Differences in the spectral shift of the Raman D and G bands are observed when heating carbon nanotubes through intense photon irradiation and by varying the temperature in a thermostat. These spectral changes in D mode are attributed to the variation of the electronic band structure by excitons creation. The investigation of the influence of doping and photoexcitation on the Raman G and D band of carbon nanotubes show that Raman spectroscopy can be used as a diagnostic tool. The spectral bands broaden and up shifts for nitrogen doped multi walled carbon nanotubes (MWCNT). The up shift for sulphuric acid doped double wall carbon nanotubes (DWCNT) synthesized from catalytic chemical vapor deposition method (CCVD) is attributed to charge transfer and strain in the lattice. We have combined sulphuric acid doping and high pressure Raman spectroscopy to investigate the properties of DWCNT. The DWCNT doped with different concentrations of sulphuric acid are explored under high pressure suggesting an effect of the molecular ordering around carbon nanotubes at higher acid concentrations. Raman spectra of individual double wall carbon nanotubes on silica show a splitting of the G band due to contributions of the inner and outer tube when using a excitation energy in resonance with the inner metallic tube and outer semiconducting tube. The spectral line widths are comparable to what has been observed for individual single wall carbon nanotubes (SWCNT) or graphene. Increased laser power shifts the G band of the outer tube to higher energies and modifies its line shape.
