STM study of oxygen on Rh(111)

被引：14
|
作者：
Xu, H [1 ]
Ng, KYS [1 ]
机构：
[1] WAYNE STATE UNIV,DEPT CHEM ENGN & MAT SCI,DETROIT,MI 48202
来源：
SURFACE SCIENCE | 1997年 / 375卷 / 2-3期
关键词：
chemisorption; oxygen; rhodium; scanning tunneling microscopy;
D O I：
10.1016/S0039-6028(97)01264-8
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：
Oxygen chemisorption on Rh(111) has been studied by static and dynamic STM measurements. O was found to form only one ordered structure of (2 x 2) above 1.5 L exposure, contradicting previous reports of three domains of (2 x 1) structure. The maximum O surface coverage was derived to be 0.25 ML. Antiphase domains of O (2 x 2) were observed to appear on the surface, suggesting a concurrent nucleation of O on the Rh(111) surface with increasing oxygen exposure. Attractive interactions between chemisorbed O atoms lead to O island formation and O coarsening into domains of (2 x 2) ordered structure extending over the whole surface. (C) 1997 Elsevier Science B.V.
引用
收藏
页码：161 / 170
页数：10
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