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Floating two-dimensional solid monolayer of C_(60) on graphite

机译:石墨上C_(60)的浮动二维固体单层

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摘要

Experiments on both single-crystal graphite and highly oriented pyrolytic graphite indicate that for 60 < T < 300 K, C_(60) forms single-layer islands of close-packed molecules at low coverages. Low-energy electrondiffraction measurements on the single crystal indicate that there is almost no preferred orientation of the C_(60) lattice relative to the graphite lattice, producing continuous diffraction rings. A slight preference for the C_(60) lattice oriented at 30° relative to the graphite lattice is explained as originating in the preference for the C_(60) islands to nucleate and align at step edges, observed with scanning tunneling microscopy and low-energy electron microscopy. The energetics of this C_(60) layer were investigated using the Novaco-McTague theory of epitaxial orientation, which found several minimum-energy angles near the experimental C_(60)-C_(60) spacing, inconsistent with the experiment and suggesting an extremely small C_(60)-graphite corrugation. The thermal expansion of this "floating solid" C_(60) lattice for 60
机译:对单晶石墨和高度取向的热解石墨的实验表明,对于60

著录项

  • 来源
    《Physical review》 |2010年第23期|p.832-842|共11页
  • 作者单位

    Department of Physics, Perm State University, University Park, Pennsylvania 16802, USA;

    Department of Materials Science and Engineering, University of Virginia, Charlottesville, Virginia 22904, USA;

    Department of Materials Science and Engineering, University of Virginia, Charlottesville, Virginia 22904, USA;

    Department of Chemical and Biomolecular Engineering, University of California, Berkeley, California 94720, USA;

    National Center for Electron Microscopy, LBNL, Berkeley, California 94720, USA;

    Department of Physics, Perm State University, University Park, Pennsylvania 16802, USA;

    Department of Physics, Lafayette College, Easton, Pennsylvania 18042, USA;

    Department of Physics, University of Wisconsin, Madison, Wisconsin 53706, USA;

    Department of Physics, Perm State University, University Park, Pennsylvania 16802, USA;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    adsorbate structure (binding sites, geometry);

    机译:吸附物结构(结合位点;几何形状);

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