Switching of a photochromic molecule on gold electrodes:: single-molecule measurements

被引：159

作者：

He, J ^{[1
]}

Chen, F

Liddell, PA

Andréasson, J

Straight, SD

Gust, D

Moore, TA

Moore, AL

Li, J

Sankey, OF

Lindsay, SM

机构：

[1] Arizona State Univ, Dept Phys & Astron, Tempe, AZ 85287 USA

[2] Arizona State Univ, Dept Chem & Biochem, Tempe, AZ 85287 USA

[3] Arizona State Univ, Biodesign Inst, Tempe, AZ 85287 USA

来源：

NANOTECHNOLOGY | 2005年 / 16卷 / 06期

关键词：

D O I：

10.1088/0957-4484/16/6/012

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

We have studied the electronic changes caused by light-induced isomerization of a photochromic molecule between an open state (that absorbs in the UV to become closed) and a closed state (that absorbs in the visible to become open). Data obtained using a newly developed repetitive break junction method are interpreted in terms of single-molecule resistances of 526 +/- 90 M Omega in the open form and 4 +/- 1 M Omega in the closed form when the molecule is bound between two gold contacts via dithiol linkages. The corresponding ratio of open to closed resistance is in close agreement with the results of ab initio calculations, though the measured resistances are about half of the calculated values. Optical spectroscopy indicates that the photoisomerization occurs in both directions on small gold particles, evaporated thin gold films, and in the break junction experiments.

引用

页码：695 / 702

页数：8

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