File Name: low energy electrons and surface chemistry .zip
It seems that you're in Germany. We have a dedicated site for Germany. Numerous illustrations illuminate the fundamental aspects of the electron optics, the experimental setup, and particularly the application results with these instruments. Surface Microscopy with Low Energy Electrons will give the reader a unified picture of the imaging, diffraction, and spectroscopy methods that are possible using low energy electron microscopes. Professor Ernst Bauer is a distinguished German-American physicist and surface scientist who has made fundamental contributions to the understanding of epitaxial growth and to the development of microscopy techniques.
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Low-energy electron diffraction LEED is a technique for the determination of the surface structure of single-crystalline materials by bombardment with a collimated beam of low energy electrons 20— eV  and observation of diffracted electrons as spots on a fluorescent screen. An electron diffraction experiment similar to modern LEED was the first to observe the wavelike properties of electrons, but LEED was established as an ubiquitous tool in surface science only with the advances in vacuum generation and electron detection techniques. The theoretical possibility of the occurrence of electron diffraction first emerged in when Louis de Broglie introduced wave mechanics and proposed the wavelike nature of all particles.
Successful structure determination entailed the development of adjustable parameter free self-consistent phase shifts, which provide a more reliable description of the electron scattering than traditional approaches. Additionally, the impact of soft surface vibrational modes on the structure determination has been investigated. It was found that the soft surface mode identified in this study has no significant bearing on the interpretation of the LEED-IV data, in contrast to suggestions in the literature.
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A "LEEM low energy electron microscope " is an instrument to obtain a surface image of a specimen. The incident electron energy is reduced to several V to several 10 V, and elastically-backscattered electrons from a specimen are accelerated by an electric field just above the specimen. The formed image is enlarged by the imaging lens and observed through a screen or a camera. The spatial resolution of LEEM is 5 to 10 nm. A dark-field image can be obtained by selecting a diffraction spot of LEED low energy electron diffraction with an aperture. The specimen area is kept at an ultrahigh vacuum to obtain surface structural information. An incident electron beam with an energy of several 10 V to several V is used.
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Low-Energy Electrons and. Surface Chemistry. G. Ertl, J. Kuppers. pp. Verlag Chemie, Weinheim, West. Germany, DM This book is intended to.
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This introductory survey of the methods that use the interaction of low energy electrons with solid matter is designed for scientists working in surface chemistry. Table of contents. Please choose whether or not you want other users to be able to see on your profile that this library is a favorite of yours. Finding libraries that hold this item You may have already requested this item.
LEED is the principal technique for the determination of surface structures. It may be used in one of two ways:. In this section, we will only consider the qualitative application of this experimental technique.
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