Mobility and trapping of molecules during oxygen adsorption on Cu(110)

被引:76
作者
Briner, BG
Doering, M
Rust, HP
Bradshaw, AM
机构
[1] Fritz-Haber-Institut der Max-Planck-Gesellschaft, Berlin, 14195
关键词
D O I
10.1103/PhysRevLett.78.1516
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
Adsorption of oxygen on Cu(110) at 4 K has been investigated by scanning tunneling microscopy. We have observed that weakly bound, ''trapped'' molecules coexist with pairs of atoms which are preferentially oriented along [1(1) over bar0$] and [001]. Molecules and atoms are both adsorbed in hollow sites. Clustering of O-2 at step edges perpendicular to [1(1) over bar0$] indicates substantial anisotropic mobility of the molecular precursor. It is concluded that precursor dynamics and multidimensionality of the potential energy surface have a dominant influence on the dissociative chemisorption of O-2 on Cu(110).
引用
收藏
页码:1516 / 1519
页数:4
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