The structure of ordered Au films on TiOx

被引：28

作者：

Chen, M. S. ^{[1
]}

Luo, K. ^{[1
]}

Kumar, D. ^{[1
]}

Wallace, W. T. ^{[1
]}

Yi, C. -W. ^{[1
]}

Gath, K. K. ^{[1
]}

Goodman, D. W. ^{[1
]}

机构：

[1] Texas A&M Univ, Dept Chem, College Stn, TX 77843 USA

来源：

SURFACE SCIENCE | 2007年 / 601卷 / 03期

基金：

美国国家科学基金会;

关键词：

gold; TiO2; nanoparticles; carbon monoxide oxidation; scanning tunneling microscopy; low-energy ion scattering spectroscopy; X-ray photoemission spectroscopy; temperature-programmed desorption;

D O I：

10.1016/j.susc.2006.10.042

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：

The growth of An on an ultra-thin, ordered Mo(112)-(8 x 2)-TiOx, was investigated using scanning tunneling microscopy (STM), low energy ion scattering spectroscopy (LEISS), X-ray photoelectron spectroscopy (XPS), and temperature programmed desorption (TPD). Wetting of the TiOx surface by Au was observed with STM and LEISS, and the ordering of the An films was atomically resolved with STM. TPD showed that An binds more strongly to the reduced TiOx film than to bulk TiO2, but more weakly than to the Mo substrate. The Au-TiOx binding energy is greater than Au-Au in bulk Au. The oxidation state of Ti in the TiOx film was deduced by XPS and from the Ti-O phonon shifts relative to bulk TiO2. The TiOx/Mo(112) film structure and those for the (1 x I)- and (1 x 3)-Au/TiOx/Mo(112) surfaces are discussed. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：632 / 637

页数：6

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