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Monday, May 11, 2020 | History

2 edition of Computer simulations of energetic ion interactions with single crystals. found in the catalog.

Computer simulations of energetic ion interactions with single crystals.

A. G. Smith

Computer simulations of energetic ion interactions with single crystals.

by A. G. Smith

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  • 36 Currently reading

Published by University of Salford in Salford .
Written in English


Edition Notes

MSc thesis, Electrical Engineering.

ID Numbers
Open LibraryOL19960798M

The approach taken in this text, is to introduce the basic continuum theory for nematic liquid crystals in equilibria, then it proceeds to simple application of this theory- in particular, there is a discussion of electrical and magnetic field effects which give rise to Freedericksz transitions, which are important in devices.5/5(2). larizable single-crystal electrodes. Keywords: single-crystal electrode, surface potential, Nernst potential, computer simulations, electron transfer, metal oxide INTRODUCTION Metal (hydr)oxides acquire a surface electric charge when brought into contact with an aqueous solution.1,2 4 Molecular and/or dissociative adsorption of water mole-.

Co-Designing a Scalable Quantum Computer with Trapped Atomic Ions K. R. Brown,1 J. Kim,2 and C. Monroe3 we show how a modular quantum computer of any size can be engineered from ion crystals, and of a single Yb+atomic ion, showing the atomic hyper ne levels j"iand j#ithat represent a qubit. The electronic ex-. Ion irradiation: stopping of energetic ions in solids When an energetic ion1 penetrates a solid, it collides with the nuclei and the electrons of the target. For the ion energies typically used in materials science (lower/much lower than several hundred MeV), the .

Ion Gated Synaptic Transistors Based on 2D van der Waals Crystals with Tunable Diffusive Dynamics. Jiadi Zhu. Key Laboratory of Microelectronic Devices and Circuits (MOE), Institute of Microelectronics, Peking University, Beijing, China. Search for Cited by:   Chiral nematic liquid crystals are known to form blue phases—liquid states of matter that exhibit ordered cubic arrangements of topological defects. Blue-phase specimens, however, are generally Cited by:


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Computer simulations of energetic ion interactions with single crystals by A. G. Smith Download PDF EPUB FB2

The field of computer simulations of anisotropic fluids is interdisciplinary and is evolving very rapidly. The present volume covers a variety of techniques and model systems, from lattices to hard particle and Gay-Berne to atomistic, for thermotropics, lyotropics, and some biologically interesting liquid : Paperback.

Computer simulations have demonstrated, The elastic interactions are determined by the ion's transverse energy, which is in the order of 10 eV. the estimates of the critical transverse energy for total reflection can find useful applications in the experiments of ion scattering at glancing by: The model of successive single binary elastic collisions used by a computer code called ARGUS is sufficiently accurate to reproduce the salient featur Cited by: Liquid crystals, polymers and polymer liquid crystals are soft condensed matter systems of major technological and scientific interest.

An understanding of the macroscopic properties of these complex systems and of their many and interesting peculiarities at the molecular level can nowadays only be attained using computer simulations and statistical mechanical theories.

The field of computer simulations of anisotropic fluids is interdisciplinary and is evolving very rapidly. The present volume covers a variety of techniques and model systems, from lattices to hard particle and Gay-Berne to atomistic, for thermotropics, lyotropics, and some biologically interesting liquid crystals.

Ion channeling study of defects in compound crystals using Monte Carlo simulations August Nuclear Instruments and Methods in Physics Research Section B Beam Interactions with Materials and.

A Study of the Shock Sensitivity of Energetic Single Crystals by Large-Scale Ab Initio Molecular Dynamics Simulations Article (PDF Available) in Nanomaterials 9(9). The effect of surface roughness on angular distributions of reflected and physically sputtered particles is investigated by ultra-high vacuum (UHV) ion-surface interaction experiments.

For this purpose, a smooth (Ra = nm) and a rough (Ra = nm) tungsten (W) surface were bombarded with carbon ions 13C+ under incidence angles of 30° and 80°.Author: Maren Hellwig, Martin Köppen, Albert Hiller, Hans Rudolf Koslowski, Andrey Litnovsky, Klaus Schmid.

This chapter deals with the experimental research and computer simulation of low- and medium-energy (E 0 = keV) ion collisions on the surface of a solid and of the accompanying effects, namely scattering, sputtering, and surface implantation. Experimental and computer simulation studies of low-energy (Е 0 = 80– eV) Cs+ ions scattering on Ta, W, Re target surfaces and Cited by: 3.

words, ‘ hard’ repulsive interactions favor fee solids, while bee occurs for ‘ soft’ interactions. In the mid-scventics, computer simulations were first.

used to study the ctyrzarCcsofcrystallization, rather than the thermodynantics. Starting with the work of Mandell et al.,’. Computer simulations reveal the energy landscape of ion channels by University of Vienna This is a schematic description of the opening and closing mechanisms of. The dynamic and energetic properties of the alkali and halide ions were calculated using molecular dynamics (MD) and free energy simulations with various different water and ion force fields including our recently developed water-model-specific ion parameters.

The properties calculated were activity coefficients, diffusion coefficients, residence times of atomic pairs, Cited by: Lyotropic liquid crystals 24 Properties of Liquid crystals 26 Order parameter 26 Relationship between molecular structure and molecular properties 28 Scope of thesis 29 2 Introduction to computer simulations 31 The first computer simulation 31 Computer simulations of liquid crystals 32 Model potentials Computer simulation of liquid crystals 3 1.

Introduction In this article, we review molecular and mesoscopic computer simulations of liquid crystalline (LC) systems. Owing to their ability to form LC mesophases, the molecules of LC materials are often called mesogens. Following a scene setting introduction and a brief description of the key.

Understanding intermolecular interactions in crystals of molecular ions continues to be difficult. On the one hand, the analysis of interactions from the point of view of formal charges of molecules, similarly as it is commonly done for inorganic ionic crystals, should be performed.

On the other hand, when various functional groups are present in the crystal, it becomes natural to look at Cited by: 1. In fact, the multiple interactions present in a single two-molecule complex are a compromise between attractive and repulsive interactions.

On the other hand, a molecular complex is not characterised by a single structure, as can be seen in crystal Cited by: 3. An introduction to atomistic simulation methods 9 where θ0 is the nominal equilibrium angle (90° for an octahedral coordination, ° for a tetrahedral coordination).

Other functions, such as more complicated distance-dependent pair terms, or multi-atom terms, can be incorporated into a model, providedFile Size: KB.

Computer simulations reveal the energy landscape of ion channels (Nanowerk News) The scientists identified a phenylalanine, which plays a key role for the transition between open and closed time consuming calculations were performed using the high performance computer cluster (VSC), which is currently the fastest computer in Austria.

Professor Doniach’s research group uses scattering of synchrotron X-rays from electron storage rings at SLAC and at the Argonne National Laboratory to study changes in the conformation of molecules as their solvent environments are changed. The research also involves computer simulations of the dynamics and energetic of the resulting changes.

Recent advances in the. Entropy-driven formation of chiral nematic phases by computer simulations Simone Dussi1 & Marjolein Dijkstra1 Predicting the macroscopic chiral behaviour of liquid crystals from the microscopic chirality of the particles is highly non-trivial, even when the chiral interactions are purely entropic in nature.

Single Point Energy Calculations Geometry Optimization. 2. 7 Use of Ab Initio Calculations in This Thesis 3 Computer Simulations Introduction to Computer Simulations Computer Simulations of Liquid Crystal Phases Model Potentials. Hard Models Soft Models Atomistic ModelsFile Size: 6MB.The practical levels of density functional theory (DFT) for solids (LDA, PBE, PW91, B3LYP) are well-known not to account adequately for the London dispersion (van der Waals attraction) so important in molecular solids, leading to equilibrium volumes for molecular crystals ∼10–15% too high.

The ReaxFF reactive force field is based on fitting such DFT calculations and suffers .INTERACTION OF IONS WITH MATTER: COMPUTER SIMULATIONS. INTRODUCTION TRIM (the Transport of Ions in Matter) is the most comprehensive computer simulation of ionstravelling through matter.

It is a Monte Carlo - calculation which .