Giant contrast reversal in scanning tunnelling microscopy of zincporphyrin monolayers on graphite

被引：3

作者：

Guo, Q ^{[1
]}

Yin, J

Palmer, RE

Bampos, N

Sanders, JKM

机构：

[1] Univ Birmingham, Sch Phys & Astron, Nanoscale Phys Res Lab, Birmingham B15 2TT, W Midlands, England

[2] Univ Cambridge, Chem Lab, Cambridge Ctr Mol Recognit, Cambridge CB2 1EW, England

来源：

CHEMICAL PHYSICS LETTERS | 2005年 / 402卷 / 1-3期

基金：

英国工程与自然科学研究理事会;

关键词：

D O I：

10.1016/j.cplett.2004.12.007

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：

Zincporphyrin trimer molecules deposited on highly oriented pyrolitic graphite have been imaged using scanning tunnelling microscopy. At bias voltages below 1.5 V, we observed giant contrast reversal where the adsorbed molecules appear more than 3 nm lower than the graphite substrate! The contrast reversal is caused by a combined effect of molecular attachment to the tip and the voltage-dependence of the molecular conductivity. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：121 / 125

页数：5

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