Self-assembled molecular rectifiers

被引：203

作者：

Dhirani, A ^{[1
]}

Lin, PH ^{[1
]}

GuyotSionnest, P ^{[1
]}

Zehner, RW ^{[1
]}

Sita, LR ^{[1
]}

机构：

[1] UNIV CHICAGO,DEPT CHEM,CHICAGO,IL 60637

来源：

JOURNAL OF CHEMICAL PHYSICS | 1997年 / 106卷 / 12期

关键词：

D O I：

10.1063/1.473523

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：

Self-assembled monolayers (SAMs) of C6H5-C=C-C6H4-C=C-C6H4SH (1) on Au(111) and Ag(111) exhibit electrical rectifying behavior when probed by the scanning tunneling microscope whereas SAMs derived from decanethiol, benzenethiol and 4-phenylethynylbenzenethiol do not. We suggest that rectification arises from the conjugated length of the molecular framework of 1 and an increase of the donor character of the sulfur atom to this system upon adsorption to the metal. This is supported by surface second-harmonic generation measurements which show a significantly larger second order optical nonlinearity of SAMs of 1 compared to the other systems. (C) 1997 American Institute of Physics.

引用

页码：5249 / 5253

页数：5

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