Alkanethiol self-assembled monolayers on Au(111) surfaces investigated by non-contact AFM

被引：30

作者：

Fukuma, T. ^{[1
]}

Kobayashi, K. ^{[1
]}

Horiuchi, T. ^{[1
]}

Yamada, H. ^{[1
]}

Matsushige, K. ^{[1
]}

机构：

[1] Kyoto Univ, Dept Elect Sci & Engn, Kyoto 6068501, Japan

来源：

APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING | 2001年 / 72卷 / Suppl 1期

关键词：

PACS: 07.79Lh; 61.61Ch; 68.55-a;

D O I：

10.1007/s003390100646

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Self-assembled monolayers (SAMs) of alkanethiol molecules(CH(3)-(CH(2))(n-1)-SH, C(n)) deposited on Au(111) surfaces were investigated by ultrahigh vacuum non-contact atomic force microscopy (UHV-NC-AFM). Octanethiol SAMs (C(8)) and hexadecanethiol (C(16)) SAMs self-assembled from ethanol solutions were used. Molecularly resolved NCAFM images of longer-chain alkanethiol (C(16)) SAMs, which are difficult to be observed by STM, are presented for the first time. The results show that the molecules in this film are hexagonally packed, making (root 3x root 3) R30 degrees structures. Imaging conditions were more stable in the case of SAMs with longer-chain molecules. This is probably because the "rigidity" depends on the chain length of the molecules. In addition, the high-resolution images of the stripe structures in lower-density region of C(8) SAMs were obtained by NC-AFM.

引用

页码：S109 / S112

页数：4

共 39 条

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