Fluctuation of acetate ions in the (2 x 1)-acetate overlayer on TiO2(110)-(1 x 1) observed by noncontact atomic force microscopy

被引：25

作者：

Fukui, K ^{[1
]}

Iwasawa, Y ^{[1
]}

机构：

[1] Univ Tokyo, Dept Chem, Grad Sch Sci, Bunkyo Ku, Tokyo 1130033, Japan

来源：

SURFACE SCIENCE | 2000年 / 464卷 / 2-3期

关键词：

atomic force microscopy; carboxylic acid; diffusion and migration; titanium oxide;

D O I：

10.1016/S0039-6028(00)00755-X

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：

Fluctuating molecules of acetate ions in the (2 x 1)-acetate overlayer on TiO2(110)-(1 x 1) were observed by noncontact atomic force microscopy. Each acetate ion adsorbed on its stable site was observed as bright round protrusion ordered in a (2 x 1) periodicity. On the other hand, acetate ions at a boundary between domains with different phases along the [001] direction moved along the [001] direction during scanning and gave fragmentary images. As a result, unstable regions for acetate ions were formed at domain boundaries. This phenomenon was explained in terms of repulsive and attractive interactions worked between acetate ions and hydroxyl hydrogen atoms, which are formed by dissociative adsorption of acetic acid. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：L719 / L726

页数：8

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