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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 14
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Book Description
Progress is reviewed in our understanding of the effects of high electrostatic fields (of the order of volts per angstrom) on the adsorption and reaction of atoms and molecules on metal and semiconductor surfaces. Chemical Reactions, Electric Fields, Nanoscale Structures.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 14
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Book Description
Progress is reviewed in our understanding of the effects of high electrostatic fields (of the order of volts per angstrom) on the adsorption and reaction of atoms and molecules on metal and semiconductor surfaces. Chemical Reactions, Electric Fields, Nanoscale Structures.
Author: Ralf Vanselow
Publisher: Springer Science & Business Media
ISBN: 3642757626
Category : Technology & Engineering
Languages : en
Pages : 471
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Book Description
This volume contains review articles written by the invited speakers at the ninth International Summer Institute in Surface Science (ISISS 1989), held at the Uni versity of Wisconsin-Milwaukee in August of 1989. During the course of ISISS, invited speakers, all internationally recognized experts in the various fields of surface science, present tutorial review lectures. In addition, these experts are asked to write review articles on their lecture topic. Former ISISS speakers serve as advisors concerning the selection of speakers and lecture topics. Emphasis is given to those areas which have not been covered in depth by recent Summer Institutes, as well as to areas which have recently gained in significance and in which important progress has been made. Because of space limitations, no individual volume of Chemistry and Physics of Solid Surfaces can possibly cover the whole area of modern surface science, or even give a complete survey of recent progress in this field. However, an attempt is made to present a balanced overview in the series as a whole. With its comprehensive literature references and extensive subject indices, this series has become a valuable resource for experts and students alike. The collected articles, which stress particularly the gas-solid interface, have been published under the following titles: Surface Science: Recent Progress and Perspectives, Crit. Rev. Solid State Sci.
Author: George Maroulis
Publisher: Imperial College Press
ISBN: 1860948863
Category : Technology & Engineering
Languages : en
Pages : 694
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Book Description
With the central importance of electric polarizability and hyperpolarizability for a wide spectrum of activities, this book charts the trends in the accurate theoretical determination of these properties in specialized fields. The contributions include reviews and original papers that extend from methodology to applications in specific areas of primary importance such as cluster science and organic synthesis of molecules with specific properties.
Author: Israel D. Vagner
Publisher: Springer Science & Business Media
ISBN: 9401002215
Category : Science
Languages : en
Pages : 343
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Book Description
A comprehensive collection of papers on theoretical aspects of electronic processes in simple and synthetic metals, superconductors, bulk and low-dimensional semiconductors under extreme conditions, such as high magnetic and electric fields, low and ultra-low temperatures. The main emphasis is on low-dimensional conductors and superconductors, where correlated electrons, interacting with magnetic or nonmagnetic impurities, phonons, photons, or nuclear spins, result in a variety of new physical phenomena, such as quantum oscillations in the superconducting state, Condon instability, Skyrmions and composite fermions in quantum Hall effect systems, and hyperfine field-induced mesoscopic and nanoscopic phenomena. Several new experimental achievements are reported that promise to delineate future trends in low temperature and high magnetic field physics, including the experimental observation of the interplay between superconductivity and nuclear spin ordering at ultra-low temperatures, new observations of Condon domains in normal metals, and an experimental proposal for the realisation of isotopically engineered, semiconductor-based spin-qubit elements for future quantum computation and communication technology.
Author: Michael C. Kelley
Publisher: Newnes
ISBN: 0123978831
Category : Science
Languages : en
Pages : 230
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Book Description
The Earth’s Electric Field provides you with an integrated and comprehensive picture of the generation of the terrestrial electric fields, their dynamics and how they couple/propagate through the medium. The Earth’s Electric Field provides basic principles of terrestrial electric field related topics, but also a critical summary of electric field related observations and their significance to the various related phenomena in the atmosphere. For the first time, Kelley brings together information on this topic in a coherent way, making it easy to gain a broad overview of the critical processes in an efficient way. If you conduct research in atmospheric science, physics, atmospheric chemistry, space plasma physics, and solar terrestrial physics, you will find this book to be essential reading. The only book on the physics of terrestrial electric fields and their generation mechanisms, propagation and dynamics–making it essential reading for scientists conducting research in upper atmospheric, ionospheric, magnetospheric and space weather Covers the processes related to electric field generation and electric field coupling in the upper atmosphere along with providing new insights about electric fields generated by sources from sun to mud Focuses on real-world implications—covering topics such as space weather, earthquakes, the effect on power grids, and the effect on GPS and communication devices
Author: Markus Karahka
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Book Description
This thesis is a theoretical study on the effects of high electrostatic fields, fields of the order of Volts per Angstrøm, on the structure and stability of water, MgO, ZnO, and Si nanoclusters. A high electrostatic field applied across a material will raise the energy levels of a molecular orbital relative to another molecular orbital in the field direction. This rearrangement of the bonding and antibonding orbitals or field-induced chemistry can cause: (i) the electronic transformation of one material into another creating a continuous periodic table, (ii) the formation of new structures which are stable in the field, and (iii) field-induced dissociation or field evaporation. We perform detailed quantum mechanical calculations using density functional theory to explain experimental observations and explore the above effects. To understand Atom Probe results on the field evaporation of semiconductors we calculate the effects of high electrostatic fields on MgO, ZnO, and Si clusters to follow the structural changes during field evaporation and to obtain potential energy curves, partial charges and desorption pathways. We obtain field evaporation products seen in experiment, address the question of what happens to the oxygen during field evaporation of the oxide, and explain why the O goes missing. It can migrate down the (metallic) surface of the tip and eventually desorb either as atoms or molecules (neutral). Evidence of field-induced metallization of the semiconductors is seen through closure of the HOMO-LUMO gaps, increases in dielectric constant and polarizability, and field expulsion inside the clusters. Strong band gap shrinkage of a dielectric nanostructure in a field was experimentally confirmed. Finally, it has been observed in field ion microscopy experiments that long whiskers of up to 12 water molecules can form. We present whisker structures and energetics, lower and upper threshold fields, and fragmentation patterns. Our results are in general agreement with experiments including the fact that predominantly small protonated clusters break off. We also look at the quantum mechanics of charge transport along proton wires both with free ends and donor/acceptor terminated. The charge transfer times and the conductivity of the proton wire were calculated in agreement with experimental results.
Author: Gorur G. Raju
Publisher: CRC Press
ISBN: 9780824708641
Category : Technology & Engineering
Languages : en
Pages : 592
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Book Description
Discover nontraditional applications of dielectric studies in this exceptionally crafted field reference or text for seniors and graduate students in power engineering tracks. This text contains more than 800 display equations and discusses polarization phenomena in dielectrics, the complex dielectric constant in an alternating electric field, dielectric relaxation and interfacial polarization, the measurement of absorption and desorption currents in time domains, and high field conduction phenomena. Dielectrics in Electric Fields is an interdisciplinary reference and text for professionals and students in electrical and electronics, chemical, biochemical, and environmental engineering; physical, surface, and colloid chemistry; materials science; and chemical physics.
Author: Samuel J. Ling
Publisher:
ISBN: 9789888407613
Category : Science
Languages : en
Pages : 818
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Book Description
University Physics is designed for the two- or three-semester calculus-based physics course. The text has been developed to meet the scope and sequence of most university physics courses and provides a foundation for a career in mathematics, science, or engineering. The book provides an important opportunity for students to learn the core concepts of physics and understand how those concepts apply to their lives and to the world around them. Due to the comprehensive nature of the material, we are offering the book in three volumes for flexibility and efficiency. Coverage and Scope Our University Physics textbook adheres to the scope and sequence of most two- and three-semester physics courses nationwide. We have worked to make physics interesting and accessible to students while maintaining the mathematical rigor inherent in the subject. With this objective in mind, the content of this textbook has been developed and arranged to provide a logical progression from fundamental to more advanced concepts, building upon what students have already learned and emphasizing connections between topics and between theory and applications. The goal of each section is to enable students not just to recognize concepts, but to work with them in ways that will be useful in later courses and future careers. The organization and pedagogical features were developed and vetted with feedback from science educators dedicated to the project. VOLUME II Unit 1: Thermodynamics Chapter 1: Temperature and Heat Chapter 2: The Kinetic Theory of Gases Chapter 3: The First Law of Thermodynamics Chapter 4: The Second Law of Thermodynamics Unit 2: Electricity and Magnetism Chapter 5: Electric Charges and Fields Chapter 6: Gauss's Law Chapter 7: Electric Potential Chapter 8: Capacitance Chapter 9: Current and Resistance Chapter 10: Direct-Current Circuits Chapter 11: Magnetic Forces and Fields Chapter 12: Sources of Magnetic Fields Chapter 13: Electromagnetic Induction Chapter 14: Inductance Chapter 15: Alternating-Current Circuits Chapter 16: Electromagnetic Waves
Author: Roman V. Krems
Publisher: John Wiley & Sons
ISBN: 1119387396
Category : Science
Languages : en
Pages : 422
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Book Description
A tutorial for calculating the response of molecules to electric and magnetic fields with examples from research in ultracold physics, controlled chemistry, and molecular collisions in fields Molecules in Electromagnetic Fields is intended to serve as a tutorial for students beginning research, theoretical or experimental, in an area related to molecular physics. The author—a noted expert in the field—offers a systematic discussion of the effects of static and dynamic electric and magnetic fields on the rotational, fine, and hyperfine structure of molecules. The book illustrates how the concepts developed in ultracold physics research have led to what may be the beginning of controlled chemistry in the fully quantum regime. Offering a glimpse of the current state of the art research, this book suggests future research avenues for ultracold chemistry. The text describes theories needed to understand recent exciting developments in the research on trapping molecules, guiding molecular beams, laser control of molecular rotations, and external field control of microscopic intermolecular interactions. In addition, the author presents the description of scattering theory for molecules in electromagnetic fields and offers practical advice for students working on various aspects of molecular interactions. This important text: Offers information on theeffects of electromagnetic fields on the structure of molecular energy levels Includes thorough descriptions of the most useful theories for ultracold molecule researchers Presents a wealth of illustrative examples from recent experimental and theoretical work Contains helpful exercises that help to reinforce concepts presented throughout text Written for senior undergraduate and graduate students, professors, researchers, physicists, physical chemists, and chemical physicists, Molecules in Electromagnetic Fields is an interdisciplinary text describing theories and examples from the core of contemporary molecular physics.
Author: V. P. Savinov
Publisher: CRC Press
ISBN: 0429894236
Category : Science
Languages : en
Pages : 322
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Book Description
This book describes the physical mechanism of high-frequency (radio-frequency) capacitive discharge (RFCD) of low and medium pressure and the properties of discharge plasma in detail. The main properties and characteristics of RFCD, the features of electric breakdown in a high-frequency field are also investigated. The properties of near-electrode layers of a spatial discharge, the nature of the electric field in them, and the processes of charge transport to electrodes are explored. The work is intended for scientists engaged in gas discharge physics and low-temperature plasmas, graduate students and students of physics, physical chemistry, and relevant specialties.
