Identifying Hydroxyls on the TiO2 (110)-1 x 1 Surface with Scanning Tunneling Microscopy

被引：52

作者：

Cui, Xuefeng ^{[1
]}

Wang, Zhuo ^{[1
]}

Tan, Shijing ^{[1
]}

Wang, Bing ^{[1
]}

Yang, Jinlong ^{[1
]}

Hou, J. G. ^{[1
]}

机构：

[1] Univ Sci & Technol China, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Anhui, Peoples R China

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2009年 / 113卷 / 30期

关键词：

INITIO MOLECULAR-DYNAMICS; WATER-ADSORPTION; TIO2(110); STM; DISSOCIATION; 1ST-PRINCIPLES; DESORPTION; TRANSITION; DIFFUSION; HYDROGEN;

D O I：

10.1021/jp901657u

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 present the investigations of hydroxylated TiO2 (110)-1 x 1 surfaces using scanning tunneling microscopy (STM). It is observed that in topographic images the protrusions of hydroxyls (OH) on TiO2 (110) surfaces are dependent oil the tip-sample distance in STM measurements at room temperature. In comparison with those of the fivefold coordinated Ti atoms and the oxygen vacancies, the relative apparent height of OHs becomes smaller and smaller with decreasing tip-sample distance by changing the imaging conditions. The OHs even become invisible in much shorter tip-sample distances. Reversibly, the OHs are almost completely recovered when the imaging conditions are restored. It suggests that the OHs may be identified by varying the imaging conditions in STM measurement.

引用

页码：13204 / 13208

页数：5

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