A SEXAFS AND X-RAY STANDING WAVE STUDY OF THE CU(111)(SQUARE-ROOT-7-X-SQUARE-ROOT-7)R19-DEGREES-S SURFACE - ADSORBATE SUBSTRATE AND ADSORBATE ADSORBATE REGISTRY

被引：53

作者：

PRINCE, NP ^{[1
]}

SEYMOUR, DL ^{[1
]}

ASHWIN, MJ ^{[1
]}

MCCONVILLE, CF ^{[1
]}

WOODRUFF, DP ^{[1
]}

JONES, RG ^{[1
]}

机构：

[1] UNIV NOTTINGHAM,DEPT CHEM,NOTTINGHAM NG7 2RD,ENGLAND

来源：

SURFACE SCIENCE | 1990年 / 230卷 / 1-3期

关键词：

D O I：

10.1016/0039-6028(90)90012-W

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：

Analysis of S K-edge SEXAFS and normal incidence X-ray standing wavefield absorption from the Cu(111)( 7 × 7)R19°-S structure shows that the surface is composed of a layer of copper sulphide of stoichiometry CuS with a CuS nearest neighbour bond length of 2.30 Å. There appears to be some variability in the exact structure of this phase, but it seems likely that the dominant structure involves a mixture of sulphur atoms both above and below the copper atoms in the sulphide layer, with the sulphur atoms predominantly in hollow sites relative to the substrate, and the overlayer copper atoms in locally identical, low symmetry, off-bridge sites. © 1990.

引用

页码：13 / 26

页数：14

共 28 条

[1] MULTIPLE BONDLENGTHS AND SHORT DATA RANGES IN SEXAFS AND EXAFS [J].