Role of stress on charge transfer through self-assembled alkanethiol monolayers on Au

被引：56

作者：

Son, KA ^{[1
]}

Kim, HI ^{[1
]}

Houston, JE ^{[1
]}

机构：

[1] Sandia Natl Labs, Albuquerque, NM 87185 USA

来源：

PHYSICAL REVIEW LETTERS | 2001年 / 86卷 / 23期

关键词：

D O I：

10.1103/PhysRevLett.86.5357

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have studied charge transfer through alkanethiol molecules self-assembled on Au(lll) substrates using interfacial force microscopy. Simultaneous measurement of the tip-substrate current and the normal interfacial force reveals the critical role of tip-film contact. Measurable currents are seen only for tip-applied stresses above about 20 MPa, after which the current rises exponential with stress. We suggest that charge transfer results from stress-induced band-gap states near the Fermi level in these normally highly insulating molecular films.

引用

页码：5357 / 5360

页数：4

共 24 条

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