期刊
SURFACE SCIENCE
卷 603, 期 5, 页码 L39-L43出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.susc.2009.01.029
关键词
Metal phthalocyanine; CuPc; Low-temperature scanning tunneling microscopy; Cu(111)
资金
- Deutsche Forschungsgemeinschaft [SFB 616]
The adsorption of copper phthalocyanine (CuPc) on Cu(1 1 1) 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. (c) 2009 Elsevier B.V. All rights reserved.
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