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Microscopic Physical And Chemical Properties Of Graphite Intercalation Compounds
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Book Synopsis Microscopic Physical and Chemical Properties of Graphite Intercalation Compounds by :
Download or read book Microscopic Physical and Chemical Properties of Graphite Intercalation Compounds written by and published by . This book was released on 1992 with total page 59 pages. Available in PDF, EPUB and Kindle. Book excerpt: Optical spectroscopy (Raman, FTIR and Reflection) was used to study a variety of acceptor- and donor-type compounds synthesized to determine the microscopic models consistent with the spectrocsopic results. General finding is that the electrical conduction properties of these compounds can be understood on the basis that the intercalation of atomic and/or molecular species between the host graphite layers either raises or lowers the Fermi level (E{sub F)} in a graphitic band structure. This movement of E{sub F} is accomplished via a charge transfer of electrons from the intercalate layers to the graphitic layers (donor compounds), or vice versa (acceptor compounds). Furthermore, the band structure must be modified to take into account the layers of charge that occur as a result of the charge transfer. This charge layering introduces additional bands of states near E{sub F}, which are discussed. Charge-transfer also induces a perturbation of the graphitic normal mode frequencies which can be understood as the result of a contraction (acceptor compounds) or expansion (donor compounds) of the intralayer C-C bonds. Ab-initio calculations support this view and are in reasonable agreement with experimental data.
Book Synopsis Studies of the Microscopic Physical and Chemical Properties of Graphite Intercalation Compounds by :
Download or read book Studies of the Microscopic Physical and Chemical Properties of Graphite Intercalation Compounds written by and published by . This book was released on 1982 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Progress in the following studies is reported: optical properties; Raman and inelastic neutron scattering; hydrogen storage in alkali metal-graphite intercalation compounds (GIC's); intercalation chemistry of the MX/sub 5/-graphite intercalation compounds (M = As, Sb, X = Cl, F); and low-temperature magnetoresistance (acceptor-GIC's) and pressure-dependent superconductivity (donor GIC's). The objective of the optical reflectance measurements is to determine the frequency dependent dielectric constant for several important graphite intercalation compounds and to correlate this constant with theoretical predictions. Our recent Raman scattering work has primarily focused on the intercalation-induced shifts of zone-center, zone-interior and zone-edge graphitic, phonon frequencies in prototypical acceptor (SbCl/sub 5/-graphite) and donor (Rb-graphite) cmpounds. The inelastic neutron scattering work has focused on the low energy (.omega.
Book Synopsis Microscopic Physical and Chemical Properties of Graphite Intercalation Compounds. Final Report, August 1, 1984--July 31, 1985 by :
Download or read book Microscopic Physical and Chemical Properties of Graphite Intercalation Compounds. Final Report, August 1, 1984--July 31, 1985 written by and published by . This book was released on 1992 with total page 59 pages. Available in PDF, EPUB and Kindle. Book excerpt: Optical spectroscopy (Raman, FTIR and Reflection) was used to study a variety of acceptor- and donor-type compounds synthesized to determine the microscopic models consistent with the spectrocsopic results. General finding is that the electrical conduction properties of these compounds can be understood on the basis that the intercalation of atomic and/or molecular species between the host graphite layers either raises or lowers the Fermi level (E{sub F)} in a graphitic band structure. This movement of E{sub F} is accomplished via a charge transfer of electrons from the intercalate layers to the graphitic layers (donor compounds), or vice versa (acceptor compounds). Furthermore, the band structure must be modified to take into account the layers of charge that occur as a result of the charge transfer. This charge layering introduces additional bands of states near E{sub F}, which are discussed. Charge-transfer also induces a perturbation of the graphitic normal mode frequencies which can be understood as the result of a contraction (acceptor compounds) or expansion (donor compounds) of the intralayer C-C bonds. Ab-initio calculations support this view and are in reasonable agreement with experimental data.
Book Synopsis Graphite Intercalation Compounds II by : Hartmut Zabel
Download or read book Graphite Intercalation Compounds II written by Hartmut Zabel and published by Springer Science & Business Media. This book was released on 2013-03-07 with total page 442 pages. Available in PDF, EPUB and Kindle. Book excerpt: The research on graphite intercalation compounds often acts as a forerunner for research in other sciences. For instance, the concept of staging, which is fundamental to graphite intercalation compounds, is also relevant to surface science in connection with adsorbates on metal surfaces and to high-temperature superconducting oxide layer materials. Phonon-folding and mode-splitting effects are not only basic to graphite intercalation compounds but also to polytypical systems such as supercon ductors, superlattices, and metal and semiconductor superlattices. Charge transfer effects playa tremendously important role in many areas, and they can be most easily and fundamentally studied with intercalated graphite. This list could be augmented with many more examples. The important message, however, is that graphite inter calation compounds represent a class of materials that not only can be used for testing a variety of condensed-matter concepts, but also stimulates new ideas and approaches. This volume is the second of a two-volume set. The first volume addressed the structural and dynamical aspects of graphite intercalation compounds, together with the chemistry and intercalation of new compounds. This second volume provides an up-to-date status report from expert researchers on the transport, magnetic, elec tronic and optical properties ofthis unique class of materials. The band-structure cal culations of the various donor and acceptor compounds are discussed in depth, and detailed reviews are provided ofthe experimental verification ofthe electronic struc ture in terms of their photoemission spectra and optical properties.
Book Synopsis Graphite Intercalation Compounds I by : Hartmut Zabel
Download or read book Graphite Intercalation Compounds I written by Hartmut Zabel and published by Springer Science & Business Media. This book was released on 2013-03-07 with total page 365 pages. Available in PDF, EPUB and Kindle. Book excerpt: The progress of materials science depends on the development of novel materials and the development of novel experimental techniques. The research on graphite intercalation compounds combines both aspects: new compounds with strikingly new and anisotropic properties have been synthesized and analyzed during the past couple of years by means of state-of-the-art experimental methods. At the same time, the preparation of the compounds already known has improved con siderably, giving increased reliability and reproducibility of the experimental results. The high quality experimental data now available have stimulated theo retical work. Moreover, the theoretical work has had a great impact on further experimental studies, with the effect of a much improved understanding of this class of materials. This volume is dedicated to a thorough description of all relevant experimen tal and theoretical aspects of the structural and dynamical properties of graphite intercalation compounds. Because of the large number of topics, a second vol ume, which is now in preparation, will follow and will treat the electronic, transport, magnetic, and optical properties. The second volume will also contain a chapter on applications of graphite intercalation compounds. There have been a number of reviews written on selected aspects of these compounds in various journals and conference proceedings during the last couple of years, but this is the first comprehensive review since the thorough overview provided by M.S. Dresselhaus and G. Dresselhaus appeared ten years ago.
Book Synopsis Graphite Intercalation Compounds and Applications by : Toshiaki Enoki
Download or read book Graphite Intercalation Compounds and Applications written by Toshiaki Enoki and published by Oxford University Press. This book was released on 2003-03-27 with total page 556 pages. Available in PDF, EPUB and Kindle. Book excerpt: Graphite intercalation compounds are a new class of electronic materials that are classified as graphite-based host guest systems. They have specific structural features based on the alternating stacking of graphite and guest intercalate sheets. The electronic structures show two-dimensional metallic properties with a large variety of features including superconductivity. They are also interesting from the point of two-dimensional magnetic systems. This book presents the synthesis, crystal structures, phase transitions, lattice dynamics, electronic structures, electron transport properties, magnetic properties, surface phenomena, and applications of graphite intercalation compounds. The applications covered include batteries, highly conductive graphite fibers, exfoliated graphite and intercalated fullerenes and nanotubes.
Book Synopsis Structural and Electrical Properties of Graphite Intercalation Compounds and Graphite Fiber Compounds by : Xiao-Wen Qian
Download or read book Structural and Electrical Properties of Graphite Intercalation Compounds and Graphite Fiber Compounds written by Xiao-Wen Qian and published by . This book was released on 1986 with total page 350 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 702 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Graphite intercalation compounds by : Hartmut Zabel
Download or read book Graphite intercalation compounds written by Hartmut Zabel and published by Springer My Copy UK. This book was released on 1990-07-30 with total page 378 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book covers the basic physics and chemistry of graphite intercalation compounds. Emphasis is laid on the layered or quasi-two-dimensional structure of these compounds, which provides an exciting arena for testing physical concepts in lower dimensions. The chapters in this volume, all of which have been written by internationally recognized experts in the field, cover the following topics: the structure and phase transitions of intercalate atoms and molecules in graphite, the physics of staging formation and staging transitions, the lattice dynamics of these compounds as determined by inelastic neutron scattering and optical methods, the diffusivity of the guest species, mesoscopic properties such as domain structures and stacking arrangements, and the synthesis of new compounds. The reviews provide a comprehensive overview of the current status of the field of two- dimensional physics.
Book Synopsis Graphite Intercalation Compounds by : M. S. Dresselhaus
Download or read book Graphite Intercalation Compounds written by M. S. Dresselhaus and published by . This book was released on 1986 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Graphite Intercalation Compounds II by : Hartmut Zabel
Download or read book Graphite Intercalation Compounds II written by Hartmut Zabel and published by Springer. This book was released on 1992-08-13 with total page 433 pages. Available in PDF, EPUB and Kindle. Book excerpt: The research on graphite intercalation compounds often acts as a forerunner for research in other sciences. For instance, the concept of staging, which is fundamental to graphite intercalation compounds, is also relevant to surface science in connection with adsorbates on metal surfaces and to high-temperature superconducting oxide layer materials. Phonon-folding and mode-splitting effects are not only basic to graphite intercalation compounds but also to polytypical systems such as supercon ductors, superlattices, and metal and semiconductor superlattices. Charge transfer effects playa tremendously important role in many areas, and they can be most easily and fundamentally studied with intercalated graphite. This list could be augmented with many more examples. The important message, however, is that graphite inter calation compounds represent a class of materials that not only can be used for testing a variety of condensed-matter concepts, but also stimulates new ideas and approaches. This volume is the second of a two-volume set. The first volume addressed the structural and dynamical aspects of graphite intercalation compounds, together with the chemistry and intercalation of new compounds. This second volume provides an up-to-date status report from expert researchers on the transport, magnetic, elec tronic and optical properties ofthis unique class of materials. The band-structure cal culations of the various donor and acceptor compounds are discussed in depth, and detailed reviews are provided ofthe experimental verification ofthe electronic struc ture in terms of their photoemission spectra and optical properties.
Book Synopsis Structural and Elastic Properties of Graphite Intercalation Compounds by : David Peter DiVincenzo
Download or read book Structural and Elastic Properties of Graphite Intercalation Compounds written by David Peter DiVincenzo and published by David DiVincenzo. This book was released on 2015-01-15 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Graphite Intercalation Compounds II by : Hartmut Zabel
Download or read book Graphite Intercalation Compounds II written by Hartmut Zabel and published by . This book was released on 1992 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Structure-Property Relationships in Intercalated Graphite by : M. S. Dresselhaus
Download or read book Structure-Property Relationships in Intercalated Graphite written by M. S. Dresselhaus and published by . This book was released on 1982 with total page 31 pages. Available in PDF, EPUB and Kindle. Book excerpt: Under this contract a study has been carried out on the electronic, lattice, magnetic, structural, and thermal transport properties of intercalated graphite, including the modeling of these properties. The research program being carried out under this grant has been directed toward gaining an increased and fundamental understanding of the properties of graphite intercalation compounds in order to be able to produce better materials with more controlled physical properties. By using diverse experimental techniques it is possible to correlate and interrelate the electronic, lattice, structural, magnetic and thermal transport properties of intercalated graphite and to interpret the dependence of these properties on the stage of the intercalation compound. During the two year period of this contract major advances have been made in each of these areas. Particularly noteworthy is the use of high resolution electron microscopy to monitor the c-axis and in-plane ordering on an atomic scale. Using single crystal Kish graphite host material, we have found evidence for large regions of defect-free single phase intercalant superlattices with dimensions of at least one order of magnitude greater than expected on the basis of previous work. A major advance has been made in the use of high resolution x-ray scattering to study structural phase transitions in the graphite-bromine system. Work on superconducting compounds has been initiated.
Download or read book Energy Research Abstracts written by and published by . This book was released on 1993 with total page 354 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Thermal and Physical Properties of Graphite Intercalation Compounds by : David G. Onn
Download or read book Thermal and Physical Properties of Graphite Intercalation Compounds written by David G. Onn and published by . This book was released on 1982 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: Five major contributions to research in graphite intercalation compounds (GIC's) have been made. They are (1) the discovery of superconductivity in the mercurographitides (KHgC8 and RbHgC8) which was first seen in low temperature specific heat (Cp) studies, (2) that low-energy phonon states appear to play a role in suppressing Tc for superconducting GIC's and may suppress superconductivity altogether, (3) the re-awakening of interest in magnetic graphite intercalation compounds arising in part from our specific heat studies which suggest the possibility of a magnetic spin-glass state in FeCl3 and NiCl2 compounds, and (4) the confirmation that a low density of electronic states is common to a wide class of acceptor intercalation compounds. In addition, (5) it permitted completion of research that showed for the first time the university of 'twin' phase transitions in donor alkali metal GIC's below stage 1. Of the above, (1), (3) and (5) have led to a wealth of further research by other groups in recent years and have had lasting influence in this research area. Research performed under this grant was devoted primarily to the determination of the low temperature physical properties of a wide range of graphite intercalation compounds (GIC's) and the interpretation of these properties. In addition some new GIC's were synthesized and transport studies initiated elsewhere were completed.
Author :United States. Department of Energy. Office of Basic Energy Sciences Publisher : ISBN 13 : Total Pages :192 pages Book Rating :4.F/5 ( download)
Book Synopsis Materials Sciences Programs by : United States. Department of Energy. Office of Basic Energy Sciences
Download or read book Materials Sciences Programs written by United States. Department of Energy. Office of Basic Energy Sciences and published by . This book was released on 1981 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt:
