扫描隧道显微镜研究酞菁铜和 truxenone 衍生物在石墨上的二元超结构。

Scanning tunneling microscopy investigation of copper phthalocyanine and truxenone derivative binary superstructures on graphite.

机构信息

Institute of Chemistry, the Chinese Academy of Sciences (CAS) and Beijing National Laboratory for Molecular Sciences, Beijing 100190, China.

出版信息

Chem Asian J. 2011 Feb 1;6(2):424-9. doi: 10.1002/asia.201000628. Epub 2010 Nov 24.

DOI:10.1002/asia.201000628

PMID:21254420

Abstract

The binary self-assembly of copper phthalocyanine (CuPc) and 2,3,7,8,12,13-hexahexyloxy-truxenone (TrO23) at the solid/liquid interface of highly oriented pyrolytic graphite (HOPG) was investigated by using scanning tunneling microscopy (STM) and scanning tunneling spectroscopy (STS). Pseduohexagonal and linear patterned superstructures of CuPc are obtained by co-adsorbing with TrO23. High-resolution STM images reveal the structural details of the arrangement of TrO23 and CuPc in the binary assembly structures. The molecular ratio between CuPc and TrO23 in the adlayer can be modulated by the CuPc concentration in liquid phase. The electronic properties of CuPc and TrO23 in the co-adsorbed self-assembly are investigated by STS. The results presented here are helpful to the design and fabrication of multi-component functional molecular nanostructures.

摘要

采用扫描隧道显微镜（STM）和扫描隧道谱（STS）研究了在高度取向热解石墨（HOPG）的固/液界面处铜酞菁（CuPc）和 2,3,7,8,12,13-六己氧基三酮（TrO23）的自组装。通过与 TrO23 共吸附，得到了 CuPc 的拟六边形和线性图案超结构。高分辨率 STM 图像揭示了二元组装结构中 TrO23 和 CuPc 排列的结构细节。通过改变液相中 CuPc 的浓度，可以调节吸附层中 CuPc 和 TrO23 的分子比。通过 STS 研究了共吸附自组装中 CuPc 和 TrO23 的电子性质。这里呈现的结果有助于设计和制造多组分功能分子纳米结构。