SCANNING TUNNELING MICROSCOPY STUDIES OF IODIDE ADSORPTION ON AU(111) - DIRECT OBSERVATION OF ADLATTICE ORIENTATION

被引：53

作者：

MCCARLEY, RL ^{[1
]}

BARD, AJ ^{[1
]}

机构：

[1] UNIV TEXAS,DEPT CHEM & BIOCHEM,AUSTIN,TX 78712

来源：

JOURNAL OF PHYSICAL CHEMISTRY | 1991年 / 95卷 / 24期

关键词：

D O I：

10.1021/j100177a002

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 is used in air to image iodide adlayers on Au(111) with atomic resolution over areas as large as 625 nm2. Dosing of the Au surfaces with aqueous KI results in only one observable adsorbate structure over the iodide concentration range of 10(-2)-10(-5) M. The I/Au layer has a nearest- and next-nearest-neighbor spacing of 0.50 +/- 0.03 and 0.88 +/- 0.05 nm, respectively, consistent with a (square-root 3 X square-root 3)R30-degrees adlattice structure on Au(111). Direct evidence for the adlayer structure is obtained from atomic resolution images of an interface between iodide-coated and bare Au(111) regions.

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页码：9618 / 9620

页数：3

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