SULFUR ADSORPTION ON CU(110) - A SEXAFS STUDY

被引：28

作者：

ATREI, A ^{[1
]}

JOHNSON, AL ^{[1
]}

KING, DA ^{[1
]}

机构：

[1] UNIV CAMBRIDGE,DEPT CHEM,CAMBRIDGE CB2 1EW,ENGLAND

来源：

SURFACE SCIENCE | 1991年 / 254卷 / 1-3期

关键词：

D O I：

10.1016/0039-6028(91)90638-9

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：

Polarization-dependent SEXAFS measurements have been performed for various phases formed by sulphur adsorption on Cu{110}. At low coverage, a diffuse c(2 x 2) LEED pattern is observed. Upon increasing S coverage, splitting of the (1/2, 1/2) spots occurs, initially in the <001> direction and subsequently in the <110BAR> direction. The SEXAFS results show that, independent of the S coverage, the adatoms occupy the two-fold hollow site on the Cu{110} surface with a S-Cu bond length of 2.37 +/- 0.03 angstrom. S adsorption is associated with an expansion of the first interplanar distance in copper. The splitting of the half-order beams is attributed to the formation of antiphase domain boundaries.

引用

页码：65 / 72

页数：8

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