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Quantification of finite-temperature effects on adsorption geometries of π -conjugated molecules: Azobenzene/Ag(111)

机译:有限温度对π共轭分子吸附几何结构的影响的定量:偶氮苯/ Ag(111)

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摘要

The adsorption structure of the molecular switch azobenzene on Ag(111) is investigated by a combination of normal incidence x-ray standing waves and dispersion-corrected density functional theory. The inclusion of nonlocal collective substrate response (screening) in the dispersion correction improves the description of dense monolayers of azobenzene, which exhibit a substantial torsion of the molecule. Nevertheless, for a quantitative agreement with experiment explicit consideration of the effect of vibrational mode anharmonicity on the adsorption geometry is crucial.
机译:结合垂直入射x射线驻波和色散校正密度泛函理论研究了分子开关偶氮苯在Ag(111)上的吸附结构。分散校正中包含非局部集体底物响应(筛选)可改善对偶氮苯致密单分子层的描述,该分子表现出相当大的扭转力。然而,对于与实验的定量协议,明确考虑振动模式非谐性对吸附几何形状的影响至关重要。

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  • 来源
    《Physical review》 |2013年第3期|035421.1-035421.5|共5页
  • 作者单位

    Peter Gruenberg Institut (PGI-3), Forschungszentrum Juelich, 52425 Juelich, Germany,Juelich Aachen Research Alliance (JARA), Fundamentals of Future Information Technology, 52425 Julich, Germany,University of Hamburg and Center for Free-Electron Laser Science, Lumper Chausse 149, 22761 Hamburg,Germany;

    Department Chemie, Technische Universitaet Munchen, Lichtenbergstrasse 4, 85747 Garching, Germany;

    Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany;

    Freie Universitaet Berlin, Fachbereich Physik, Arnimallee 14, 14195 Berlin, Germany;

    Freie Universitaet Berlin, Fachbereich Physik, Arnimallee 14, 14195 Berlin, Germany;

    Freie Universitaet Berlin, Fachbereich Physik, Arnimallee 14, 14195 Berlin, Germany,Physikalisch-Chemisches Institut, Ruprecht-Karls-Universitaet Heidelberg, lm Neuenheimer Feld 253, 69120 Heidelberg, Germany;

    Department Chemie, Technische Universitaet Munchen, Lichtenbergstrasse 4, 85747 Garching, Germany;

    Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany;

    Peter Gruenberg Institut (PGI-3), Forschungszentrum Juelich, 52425 Juelich, Germany,Juelich Aachen Research Alliance (JARA), Fundamentals of Future Information Technology, 52425 Julich, Germany;

    Department Chemie, Technische Universitaet Munchen, Lichtenbergstrasse 4, 85747 Garching, Germany;

    Peter Gruenberg Institut (PGI-3), Forschungszentrum Juelich, 52425 Juelich, Germany,Juelich Aachen Research Alliance (JARA), Fundamentals of Future Information Technology, 52425 Julich, Germany;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    adsorbate structure (binding sites, geometry); adsorbate vibrations; X-ray standing waves; density functional theory, local density approximation, gradient and other corrections;

    机译:吸附物结构(结合位点;几何形状);吸附物振动;X射线驻波;密度泛函理论;局部密度近似;梯度和其他校正;

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