金（111）表面上酞菁铜超薄膜的变温扫描隧道显微镜和扫描隧道谱研究

Variable-temperature scanning tunneling microscopy and scanning tunneling spectroscopy study on copper phthalocyanine ultrathin films on a Au(111) surface.

作者信息

Xu M S, Xu J B, Xue K, An J, He J Z, Wilson I H

机构信息

Department of Electronic Engineering, Materials Science and Technology Research Center, Chinese University of Hong Kong, Shatin, N.T., Hong Kong.

出版信息

J Nanosci Nanotechnol. 2002 Apr;2(2):139-42. doi: 10.1166/jnn.2002.093.

DOI:10.1166/jnn.2002.093

PMID:12908299

Abstract

Variable-temperature high-resolution scanning tunneling microscopy (STM) images reveal that well-ordered copper phthalocyanine (CuPc) strips can be self-assembled by depositing CuPc molecules on a Au(111) surface. The self-assembled strips are supposed to result from the balance of the intermolecular interaction and the interaction between the molecules and substrate during annealing. The energy band (approximately 1.9-2.1 eV) of CuPc, measured by scanning tunneling spectroscopy (STS), is comparable to the optical band gap (approximately 1.7 eV). Spectroscopic measurements confirm that a dipole layer and/or an effect of image force exist at the CuPc/Au(111) interface.

摘要

变温高分辨率扫描隧道显微镜（STM）图像显示，通过在Au(111)表面沉积铜酞菁（CuPc）分子，可以自组装出排列有序的铜酞菁条带。这些自组装条带被认为是在退火过程中分子间相互作用与分子和衬底之间相互作用达到平衡的结果。通过扫描隧道谱（STS）测量得到的CuPc能带（约1.9 - 2.1 eV）与光学带隙（约1.7 eV）相当。光谱测量证实，在CuPc/Au(111)界面存在偶极层和/或镜像力效应。