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The Scattering Of Gas Molecules From Metal Surfaces
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Book Synopsis The Scattering of Gas Molecules from Metal Surfaces by : Leon Trilling
Download or read book The Scattering of Gas Molecules from Metal Surfaces written by Leon Trilling and published by . This book was released on 1973 with total page 31 pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper describes some recent findings in the mechanics of gas-surface interaction, and some experimental techniques developed for their laboratory study. It stresses the exchange of energy and momentum at the surface and incidentally suggests some of the molecular interactions which occur at orbital or entry velocities.
Book Synopsis L'Origine et la naissance de Jésus-Christ by :
Download or read book L'Origine et la naissance de Jésus-Christ written by and published by . This book was released on 1887 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Dynamics of Gas-Surface Scattering by : Frank O. Goodman
Download or read book Dynamics of Gas-Surface Scattering written by Frank O. Goodman and published by Elsevier. This book was released on 2012-12-02 with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dynamics of Gas-Surface Scattering deals with the dynamics of scattering as inferred from known properties of gases and solids. This book discusses measurements of spatial distributions of scattered atomic and molecular streams, and of the energy and momentum which gas particles exchange at solid surfaces. It also considers two regimes of scattering, both of which are associated with a lower range of incident gas energies: the thermal and structure scattering regimes. Comprised of 10 chapters, this book opens with a brief historical overview of the early experiments that investigated the dynamics of scattering of gases by surfaces. The discussion then turns to some elements of the kinetic theory of gases; intermodular potentials and interaction regimes; and classical-mechanical lattice models used in gas-surface scattering theory. The applications of molecular beams to the study of gas-surface scattering phenomena are also described. The remaining chapters focus on experiments and theories on scattering of molecular streams by surfaces of solids, with emphasis on thermal and structure regimes of inelastic scattering; quantum theory of gas-surface scattering; and quantum mechanical scattering phenomena. This text concludes with an analysis of energy exchange processes that may occur when a solid surface is completely immersed in a still gas. This monograph will be a valuable resource for students and practitioners of physics, chemistry, and applied mathematics.
Book Synopsis Dynamics of Gas-Surface Interactions by : Ricardo Diez Muino
Download or read book Dynamics of Gas-Surface Interactions written by Ricardo Diez Muino and published by Springer Science & Business Media. This book was released on 2013-02-26 with total page 439 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book gives a representative survey of the state of the art of research on gas-surface interactions. It provides an overview of the current understanding of gas surface dynamics and, in particular, of the reactive and non-reactive processes of atoms and small molecules at surfaces. Leading scientists in the field, both from the theoretical and the experimental sides, write in this book about their most recent advances. Surface science grew as an interdisciplinary research area over the last decades, mostly because of new experimental technologies (ultra-high vacuum, for instance), as well as because of a novel paradigm, the ‘surface science’ approach. The book describes the second transformation which is now taking place pushed by the availability of powerful quantum-mechanical theoretical methods implemented numerically. In the book, experiment and theory progress hand in hand with an unprecedented degree of accuracy and control. The book presents how modern surface science targets the atomic-level understanding of physical and chemical processes at surfaces, with particular emphasis on dynamical aspects. This book is a reference in the field.
Book Synopsis Investigation of the scattering of gas molecules on various surfaces by : Waldemar Jawtusch
Download or read book Investigation of the scattering of gas molecules on various surfaces written by Waldemar Jawtusch and published by . This book was released on 1963 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Molecular Beam Study of the Scattering of a Rare Gas from a Clean Well Characterized Metal Surface by : Jerry Elden Hurst
Download or read book A Molecular Beam Study of the Scattering of a Rare Gas from a Clean Well Characterized Metal Surface written by Jerry Elden Hurst and published by . This book was released on 1981 with total page 324 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Interaction of Gases with Surfaces by : Alexander V. Bogdanov
Download or read book Interaction of Gases with Surfaces written by Alexander V. Bogdanov and published by Springer Science & Business Media. This book was released on 1995-03-22 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt: Interface phenomena are most fascinating because of the mixing of different scales and the interference of diverse physical processes. This makes it necessary to use different levels of description: microscopic, kinetic, and gas-dynamical. A unified quasiclassical approach is used to answer practical questions dealing with inelastic gas-surface scattering, the kinetics of adsorption layers, the evolution of inhomogeneities and defects at the surface, the Knudsen layer, the development of boundary conditions on the kinetic and gas-dynamical levels, the determination of exchange and slip coefficients, and so on.
Book Synopsis Investigation of the Scattering of Gas Molecules on Various Surfaces by : W. Jawtusch
Download or read book Investigation of the Scattering of Gas Molecules on Various Surfaces written by W. Jawtusch and published by . This book was released on 1963 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reflections of molecular beams of air, N2, and Ar were measured on various synthetic coatings, nickel sheet and glass. A smooth silver layer was used for a reference surface. It was possible to measure the scattering distribution as a function of the incident angle on the sample surface and on the reference surface. The incomplete momentum transfer of gas particles colliding with the surface results in a decrease of frictional resistance, and must manifest itself in an increased forward scattering. Such a forward scattering was actually observed on the synthetic coatings. (Author).
Book Synopsis Scattering of Thermal Energy Gas Beams by Metallic Surfaces Ii by : John J. Hinchen
Download or read book Scattering of Thermal Energy Gas Beams by Metallic Surfaces Ii written by John J. Hinchen and published by . This book was released on 1967 with total page 99 pages. Available in PDF, EPUB and Kindle. Book excerpt: Scattering of molecular gases from platinum and tantalum was studied using an ultra-high vacuum molecular beam apparatus. Beams of the rare gases, nitrogen, oxygen, methane and water vapor were used. The angle of maximum intensity of the scattered gas beams had a dependency on experimental variables that was in fair agreement with theory. Surface contamination and roughness affected the intensity and spatial distribution of scattered beams, but no difference between polycrystalline and single crystal metal surfaces was observed. By using phase-sensitive-detection techniques, the velocity of scattered molecules was found to vary with angular position about the surface. Energy and momentum coefficients were evaluated from the experimental data. Under certain conditions, discontinuities and negative values were found for these coefficients; such excursions in energy accommodation have been theoretically predicted. The experimental results were used in analysis of free molecule and slip flows. (Author).
Book Synopsis Chemisorption of Gases on Metals by : Frederick Clifford Tompkins
Download or read book Chemisorption of Gases on Metals written by Frederick Clifford Tompkins and published by . This book was released on 1978 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Gas scattering from metal surfaces by : K. Senkiw
Download or read book Gas scattering from metal surfaces written by K. Senkiw and published by . This book was released on 1979 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Interaction of Atoms and Molecules with Solid Surfaces by : V. Bortolani
Download or read book Interaction of Atoms and Molecules with Solid Surfaces written by V. Bortolani and published by Springer Science & Business Media. This book was released on 2013-11-22 with total page 693 pages. Available in PDF, EPUB and Kindle. Book excerpt: There is considerable interest, both fundamental and technological, in the way atoms and molecules interact with solid surfaces. Thus the description of heterogeneous catalysis and other surface reactions requires a detailed understand ing of molecule-surface interactions. The primary aim of this volume is to provide fairly broad coverage of atoms and molecules in interaction with a variety of solid surfaces at a level suitable for graduate students and research workers in condensed matter physics, chemical physics, and materials science. The book is intended for experimental workers with interests in basic theory and concepts and had its origins in a Spring College held at the International Centre for Theoretical Physics, Miramare, Trieste. Valuable background reading can be found in the graduate-Ievel introduction to the physics of solid surfaces by ZangwilI(1) and in the earlier works by Garcia Moliner and F1ores(2) and Somorjai.(3) For specifically molecule-surface interac tions, additional background can be found in Rhodin and Ertl(4) and March.(S) V. Bortolani N. H. March M. P. Tosi References 1. A. Zangwill, Physics at Surfaces, Cambridge University Press, Cambridge (1988). 2. F. Garcia-Moliner and F. Flores, Introduction to the Theory of Solid Surfaces, Cambridge University Press, Cambridge (1979). 3. G. A. Somorjai, Chemistry in Two Dimensions: Surfaces, Cornell University Press, Ithaca, New York (1981). 4. T. N. Rhodin and G. Erd, The Nature of the Surface Chemical Bond, North-Holland, Amsterdam (1979). 5. N. H. March, Chemical Bonds outside Metal Surfaces, Plenum Press, New York (1986).
Book Synopsis Astronautical Research 1971 by : L.G. Napolitano
Download or read book Astronautical Research 1971 written by L.G. Napolitano and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 561 pages. Available in PDF, EPUB and Kindle. Book excerpt: The International Astronautical Federation is the only professional society in the field of aerospace engineering and Sciences which brings together specialists of all countries interested in the exploration and peaceful exploitation of space. At its annual Congresses a large number of invited and/or carefully selected con tributed papers are presented which cover a wide variety of topics and are distributed over a number of sessions, each one being organized by two leading scientists who later chair the session itself. Each year the selection of specific topics to be dealt with. is dictated either by significant new progress achieved in some sectors or by new developments and trends which are liable to influence substantially the objectives toward which space research and/or application of space technology will be oriented in the immediate future. A second rigorous screening, performed with the help of the Session Chairmen and carried out according to the same criteria identifies finally the papers which are published in the Proceedings. The outcome of all this is reliable and authoritative information as to the actual status and future trends of space activities, both from the research point of view and from the point of view of u~ilization and/or application.
Book Synopsis Chemical Bonds Outside Metal Surfaces by : Norman H. March
Download or read book Chemical Bonds Outside Metal Surfaces written by Norman H. March and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt: The problem of molecules interacting with metal surfaces has for a very long time been recognized to be of considerable technological as well as fundamental importance. Thus in the former category, a substantial number of important synthetic reactions for industrial purposes make use of metal surfaces as catalysts. Or again, problems of corrosion of metals are of great practical importance, such as in nuclear-reactor technology [see, for instance, my earlier articles, in: Physics Bulletin, Volume 25, p. 582, Institute of Physics, UK (1974); and in: Physics and Contemporqry Needs (Riazuddin, ed. ), Vol. 1, p. 53, Plenum Press, New York (1977)]. It is therefore of significance to strive to gain a more fundamental understand ing of the atomic, and ultimately the electronic, processes that occur when a molecule is brought into the proximity of a metal surface. The present volume focuses mainly on the theory and concepts involved; however, it is intended for readers in chemistry, physics, and materials science who are not specialists in theory but nevertheless wish to learn more about this truly interdisciplinary area of theoretical science. The aim of the book is to present the way in which valence theory can be synthesized with the understanding of metals that has been gained over the last half century or so. While advanced theory has at times been necessary, is largely presented in an extensive set of Appendixes.
Book Synopsis Gas-surface Interactions by : Azar Farjamnia
Download or read book Gas-surface Interactions written by Azar Farjamnia and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The adsorption and dissociation of small molecules on metal surfaces are key steps in many industrial reactions. A detailed understanding of the dynamics of these reactions provides us with the ability to control the outcome and efficacy of the reactions. The molecule-metal interactions will lead to reorientation, energy redistribution, or bond dissociation in the molecule. The process is strongly depending upon the initial conditions, i. e. the incident energy and vibrational state of the molecule, and the surface temperature. We use a fully quantum approach to compute the dissociative sticking probability of the molecules at zero overage, on the surface of metal catalysts. We use density functional theory (DFT) based electronic structure calculations to construct a reaction path Hamiltonian (RPH) for reaction. Using well tested sudden methods for adding the effects of lattice motion into quantum reactive scattering calculations allows us to directly compare the results from our theory with molecular beam studies. Using these methods, we have explored the dissociative chemisorption of H2O, HOD, and D2O on Ni(111), and found that for this late barrier system, excitations in bending and stretching vibrational modes enhance the dissociative sticking. The motion of the lattice atoms near the dissociating molecule was found to modify the height of the barrier, leading to a strong variation in reactivity with surface temperature. We also studied the dissociative chemisorption of CO2 on Ni(100) and the Ni(711) stepped surface. The mechanism for dissociation is similar on the two surfaces, including the formation of a bent anionic chemisorption precursor state. Vibrational excitation of the incident CO2 molecule can enhance the reactivity for low incident energies, and the biggest efficacy corresponds to the bending mode that leads the molecule to the bent precursor state. The vibrationally inelastic scattering of methane molecules from a Ni(111) at low incident energies was studied and we found that the vibrational energy initially in one vibrational state, can distribute into other states upon collision. We have computed this energy distribution using SRP density functional which is a van der Walls correlation functional. At low incident energies the results are similar for PBE and SRP.
Book Synopsis Dynamics of Gas-Surface Interaction by : Giorgio Benedek
Download or read book Dynamics of Gas-Surface Interaction written by Giorgio Benedek and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 295 pages. Available in PDF, EPUB and Kindle. Book excerpt: In recent decades surface science has experienced a large growth in connection with the development of various experimental techniques which are able to characterize solid surfaces through the observation of the scattering of ions, electrons, photons or atoms. These methods of investigation, known under different labels such as LEED, AES, XPS, UPS, etc. have been extensively applied in describing the structure, morphology, and chemical and physical properties of crystal surfaces and interfaces of a large variety of materials of interest in solid-state physics, electronics, metallurgy, biophysics, and heterogeneous catalysis. Among these methods we wish to emphasize molecular beam scattering from solid surfaces. ~lolecular beam scattering has gone through a large development in the last ten years. In this decade a large number of laboratories have used this method to study various clean and adsorbate-covered surfaces. The technique is nonetheless quite old. It dates back to the beginning of the thirties, when Estermann and Stern performed the first atom diffraction experiment proving the wave nature of atoms. In the following years the entire subject of gas-surface interaction was considered a branch of rarefied gas dynamics and developed in connection with aerospace research. Attention was then given to the integral properties of gas-solid interactions (sticking and energy accomodation, mean momentum transfer) rather than to atom-surface scatter ing from well-characterized surfaces.
Book Synopsis Chemistry of the Metal-gas Interface by : Meirion Wynn Roberts
Download or read book Chemistry of the Metal-gas Interface written by Meirion Wynn Roberts and published by Oxford University Press, USA. This book was released on 1978 with total page 624 pages. Available in PDF, EPUB and Kindle. Book excerpt:
