Atop adsorption site of sulphur head groups in gold-thiolate self-assembled monolayers

被引：170

作者：

Roper, MG

Skegg, MP

Fisher, CJ

Lee, JJ

Dhanak, VR

Woodruff, DP

Jones, RG

机构：

[1] Univ Nottingham, Sch Chem, Nottingham NG7 2RD, England

[2] Univ Warwick, Dept Phys, Coventry CV4 7AL, W Midlands, England

[3] CLRC Daresbury Lab, Warrington WA4 4AD, Cheshire, England

来源：

CHEMICAL PHYSICS LETTERS | 2004年 / 389卷 / 1-3期

基金：

英国工程与自然科学研究理事会;

关键词：

D O I：

10.1016/j.cplett.2004.02.109

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：

Using normal incidence X-ray standing wave (NIXSW) analysis, we show that the sulphur head group occupies the atop site for methyl-, butyl- and octyl-thiolates on Au(111), with a Au-S distance of 2.50 +/- 0.05 Angstrom, and not the hollow or bridging sites favoured by theoretical calculations. Based on the results of recent theoretical calculations and NIXSW experiments for decyl-thiolate (C10H21 S-), it is argued that thiolates may reconstruct the An surface in such a way as to create a structure in which the increasing intermolecular interactions with increasing chain length may lead to head group displacements away from atop sites. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：87 / 91

页数：5

共 33 条

[1] Structural investigation of monolayers prepared by deposition of (CH3S)2 on the (111) face of single-crystal gold [J].