Ba and BaOx surface structures on Au(111)

被引：3
|
作者：
Wu, Chen [1 ]
Castell, Martin R. [1 ]
机构：
[1] Univ Oxford, Dept Mat, Oxford OX1 3PH, England
来源：
SURFACE SCIENCE | 2012年 / 606卷 / 3-4期
关键词：
Scanning tunneling microscopy; Epitaxy; Growth; Oxidation; Surface structure; morphology; roughness; and topography; Barium and barium oxide; Au(111) substrate; SCANNING-TUNNELING-MICROSCOPY; BARIUM OXIDE-FILMS; O DOUBLE SYSTEM; THIN-FILM; ATOMIC-STRUCTURE; GOLD CATALYSTS; WORK FUNCTION; CO OXIDATION; NOX STORAGE; 0001; FACE;
D O I：
10.1016/j.susc.2011.09.013
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：
Scanning tunneling microscopy (STM) is used to investigate surface structures of barium and barium oxide grown on (22 x root 3)-reconstructed Au(111) surfaces. Evaporated Ba attaches to the Au herringbones after ultrahigh vacuum (UHV) annealing, forming a stripe pattern. Oxidation of the Ba stripes gives rise to a BaOx structure pinned to the Au herringbones. Conversely, well-ordered epitaxial BaOx structures can be obtained with oxidation of the deposited Ba by residual oxygen and subsequent UHV annealing. The two ordered BaOx phases, a (6 x 6) and a (2 root 3 x 2 root 3)-R30 degrees structure, coexist on the surface and lift the Au reconstruction. (C) 2011 Elsevier B.V. All rights reserved.
引用
收藏
页码：181 / 185
页数：5
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