Formation and diffusion of oxygen-vacancy pairs on TiO2(110)-(1 x 1)

被引：51

作者：

Cui, Xuefeng ^{[1
]}

Wang, Bing ^{[1
]}

Wang, Zhuo ^{[1
]}

Huang, Tian ^{[1
]}

Zhao, Yan ^{[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 CHEMICAL PHYSICS | 2008年 / 129卷 / 04期

基金：

中国国家自然科学基金;

关键词：

D O I：

10.1063/1.2955448

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 measurements for the diffusion of bridging oxygen vacancy (OV) crossover Ti rows via OV pairs (OVPs). Using a high-resolution scanning tunneling microscope (STM), we show that the OVs can be moved along the bridging oxygen rows driven by the STM tip at voltages higher than 3.0 V on TiO2(110)-(1x1) surface. It is found that the combination of OVPs leads to the formation of OVPs, which can diffuse crossover Ti rows under the mediation of OVs in adjacent bridging oxygen rows. The deduced diffusion activation energy for the diffusive OVPs from experiments is in agreement with first-principles calculations. The reaction activation energy of the OVPs with O-2 is lower than that of the OVs by 82 meV. (C) 2008 American Institute of Physics.

引用

页数：8

共 33 条

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