SCANNING-TUNNELING-MICROSCOPY STUDIES OF DIAZO DYE MONOLAYERS ON HOPG

被引：9

作者：

FRITZ, J

PROBST, O

DEY, S

GRAFSTROM, S

KOWALSKI, J

NEUMANN, R

机构：

[1] UNIV HEIDELBERG,INST PHYS,D-69120 HEIDELBERG,GERMANY

[2] GESELL SCHWERIONENFORSCH MBH,D-64291 DARMSTADT,GERMANY

来源：

SURFACE SCIENCE | 1995年 / 329卷 / 03期

关键词：

AZOBENZENES; GRAPHITE; LOW INDEX SINGLE CRYSTAL SURFACES; MOLECULAR BEAM EPITAXY; SCANNING TUNNELING MICROSCOPY; SURFACE STRUCTURE; MORPHOLOGY; ROUGHNESS; AND TOPOGRAPHY;

D O I：

10.1016/0039-6028(95)80009-3

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We report on scanning tunneling microscopy (STM) studies of monolayers of the diazo dye 4-[4-(N,N-dimethylamino)phenylazo]azobenzene (D2, summation formula C20H19N5) on the basal plane of highly oriented pyrolytic graphite (HOPG). Monolayers of the dye were prepared by vapour deposition or by dissolving the molecules in the liquid crystal octylcyanobiphenyl (8CB). The STM images show a double-row structure exhibiting different types of lattice defects and various domains. High-resolution images allow the identification of individual molecules and the observation of intramolecular contrast. The different orientations of the rows can be explained by a commensurate registry of the molecules with the substrate. A model for the unit cell is proposed.

引用

页码：L613 / L618

页数：6

共 17 条

[1] THE ORIENTATIONAL ORDER OF SOLUTIONS OF A DYE MOLECULE IN LIQUID-CRYSTALLINE SOLVENTS [J].