Substrate-induced Symmetry Reduction Of Cupc On Cu(l11): An Lt-stm Study
  • 【摘要】

    The adsorption of copper phthalocyanine (CuPc) on Cu(l11) was studied by means of low-temperature scanning microscopy. At very low coverage, individual molecules are randomly distributed over the surf... 展开>>The adsorption of copper phthalocyanine (CuPc) on Cu(l11) was studied by means of low-temperature scanning microscopy. At very low coverage, individual molecules are randomly distributed over the surface. Increasing the coverage, the molecules align in chains before forming ordered domains with a rectangular unit cell. The molecules are centered on top of a copper atom aligning two opposite lobes with a principal axis of the substrate. The topographic images of the molecules show a reduction of the fourfold to a twofold symmetry. At negative sample bias, a switching between two states at a typical rate of 500 Hz is observed for isolated molecules, which are neither adsorbed at defects nor forming chains or domains. 收起<<

  • 【作者】

    H. Karacuban  M. Lange  J. Schaffert  O. Weingart 

  • 【刊期】

    Surface Science EI SCI 2009年5期

  • 【语种】

    eng