Molecular Beam Studies of Surface Phonons and Gas Surface Interactions PDF Download
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Author: Steven J. Sibener Publisher: ISBN: Category : Languages : en Pages : 5
Book Description
Angle and velocity resolved inelastic helium scattering is becoming an incisive tool for probing the vibrational characteristics of clean and adsorbate covered surfaces. These experiments can be visualized as being a two-dimensional (i.e., surface sensitive) analog to inelastic neutron scattering, which has played such a crucial role in elucidating the nature of elementary excitations in bulk crystals. In this paper a general review is presented of our recent work which demonstrates how the surface vibrational properties of epitaxially grown rare gas films evolve, on a layer-by-layer basis, towards those characteristic of thick crystals. Lattice dynamics calculations are used to quantitatively analyze the data. Keywords: Surface phonon spectroscopy, Thin film dynamics, Phonon dispersion relations, Physisorption interactions, Gas-surface energy exchange, Inelastic single phonon scattering, Rare gas interaction potentials, Molecular beams. (jhd).
Author: Steven J. Sibener Publisher: ISBN: Category : Languages : en Pages : 5
Book Description
Angle and velocity resolved inelastic helium scattering is becoming an incisive tool for probing the vibrational characteristics of clean and adsorbate covered surfaces. These experiments can be visualized as being a two-dimensional (i.e., surface sensitive) analog to inelastic neutron scattering, which has played such a crucial role in elucidating the nature of elementary excitations in bulk crystals. In this paper a general review is presented of our recent work which demonstrates how the surface vibrational properties of epitaxially grown rare gas films evolve, on a layer-by-layer basis, towards those characteristic of thick crystals. Lattice dynamics calculations are used to quantitatively analyze the data. Keywords: Surface phonon spectroscopy, Thin film dynamics, Phonon dispersion relations, Physisorption interactions, Gas-surface energy exchange, Inelastic single phonon scattering, Rare gas interaction potentials, Molecular beams. (jhd).
Author: Ricardo Diez Muino Publisher: Springer Science & Business Media ISBN: 3642329551 Category : Science Languages : en Pages : 439
Book Description
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.
Author: Giorgio Benedek Publisher: Springer Science & Business Media ISBN: 3642864554 Category : Science Languages : en Pages : 295
Book Description
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.
Author: Christoph Steinsiek Publisher: ISBN: Category : Languages : en Pages :
Book Description
One of the goals of studying molecule-surface interactions is to understand the details of the chemical reactivity at surfaces. The exchange of energy between a gas and a solid is a complex sequence of events even when focused on a model system like a diatomic molecule scattering from a monocrystalline metal surface. Due to the number of energy channels of the molecule (translational, rotational and vibrational energy) and the surface (phonons, electrons) involved, a detailed knowledge about the role of each of these degrees of freedom in the collision is necessary for the modeling of such ...
Author: Winfried Kress Publisher: Springer Science & Business Media ISBN: 3642757855 Category : Science Languages : en Pages : 309
Book Description
In recent years substantial progress has been made in the detection of surface phonons owing to considerable improvements in inelastic rare gas scattering tech niques and electron energy loss spectroscopy. With these methods it has become possible to measure surface vibrations in a wide energy range for all wave vectors in the two-dimensional Brillouin zone and thus to deduce the complete surface phonon dispersion curves. Inelastic atomic beam scattering and electron energy loss spectroscopy have started to play a role in the study of surface phonons similar to the one played by inelastic neutron scattering in the investigation of bulk phonons in the last thirty years. Detailed comparison between experimen tal results and theoretical studies of inelastic surface scattering and of surface phonons has now become feasible. It is therefore possible to test and to improve the details of interaction models which have been worked out theoretically in the last few decades. At this point we felt that a concise, coherent and self-contained guide to the rapidly growing field of surface phonons was needed.
Author: Giovanni Sanna Publisher: Imperial College Press ISBN: 1860947409 Category : Science Languages : en Pages : 404
Book Description
Introduction to Molecular Beams Gas Dynamics is devoted to the theory and phenomenology of supersonic molecular beams. The book describes the main physical idea and mathematical methods of the gas dynamics of molecular beams, while the detailed derivation of results and equations is accompanied by an explanation of their physical meaning. Many of the applications of supersonic molecular beams are discussed, including their application to molecular spectroscopy, and the study of surface phonons by monoatomic and monokinetic beams, and the study of intermolecular potentials and the onset of condensation. The phenomenology of supersonic beams can appear complex to those not experienced in supersonic gas dynamics and, as a result, the few existing reviews on the topic generally assume a limited level of knowledge. The book begins with a quantitative description of the fundamental laws of gas dynamics and goes on to explain such phenomena. It analyzes the evolution of the gas jet from the continuum to the regime of almost free collisions between molecules, and includes numerous figures, illustrations, tables and references.
Author: Winfried Kress Publisher: Springer ISBN: 9783540527213 Category : Science Languages : en Pages : 301
Book Description
In recent years substantial progress has been made in the detection of surface phonons owing to considerable improvements in inelastic rare gas scattering tech niques and electron energy loss spectroscopy. With these methods it has become possible to measure surface vibrations in a wide energy range for all wave vectors in the two-dimensional Brillouin zone and thus to deduce the complete surface phonon dispersion curves. Inelastic atomic beam scattering and electron energy loss spectroscopy have started to play a role in the study of surface phonons similar to the one played by inelastic neutron scattering in the investigation of bulk phonons in the last thirty years. Detailed comparison between experimen tal results and theoretical studies of inelastic surface scattering and of surface phonons has now become feasible. It is therefore possible to test and to improve the details of interaction models which have been worked out theoretically in the last few decades. At this point we felt that a concise, coherent and self-contained guide to the rapidly growing field of surface phonons was needed.
Author: Steven J. Sibener
Author: Steven J. Sibener
Author: Ricardo Diez Muino
Author: Giorgio Benedek
Author: J. A. Barker
Author: Sam S. Fisher
Author: Christoph Steinsiek
Author: Giorgio Benedek
Author: Winfried Kress
Author: Giovanni Sanna
Author: Winfried Kress