Phase-separated alkanethiol self-assembled monolayers investigated by non-contact AFM

被引：28

作者：

Ichii, T

Fukuma, T

Kobayashi, K

Yamada, H

Matsushige, K

机构：

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

[2] Kyoto Univ, Int Innovat Ctr, Sakyo Ku, Kyoto 6068501, Japan

来源：

APPLIED SURFACE SCIENCE | 2003年 / 210卷 / 1-2期

关键词：

non-contact atomic force microscopy; Kelvin-probe force microscopy; energy dissipation; self-assembled monolayers; phase separation; alkanethiol;

D O I：

10.1016/S0169-4332(02)01487-3

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：

We investigated phase-separated self-assembled monolayers (SAMs) of alkanethiol molecules on Au(1 1 1) surfaces as model samples which have nanometer-scale domain distribution by non-contact atomic force microscopy (NC-AFM). We made SAMs composed of 1-decanethiol (CH3-(CH2)g-SH; C-10) and 1, 1 0-decanedithiol (HS-(CH2) (10)-SH; C10D). We obtained topographic, surface potential (SP) and energy dissipation images. The obtained topographic images suggested the sample surface was composed of closely packed C-10 monolayer domains and C10D domains. The SP of C-10 domains were about 100-150 mV higher than that of C10D domains. The energy dissipation on C10D domains were larger than that on C-10 domains. We discussed the origins of difference in SP and the dissipated energy on the C-10 and C10D domains. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：99 / 104

页数：6

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