HREELS study of alkanethiol passivated gold clusters on graphite

被引：8

作者：

Chen, Y ^{[1
]}

Palmer, RE

Wilcoxon, JP

机构：

[1] Univ Birmingham, Sch Phys & Astron, Nanoscale Phys Res Lab, Birmingham B15 2TT, W Midlands, England

[2] Sandia Natl Labs, Nanostruct & Adv Mat Dept 152, Albuquerque, NM 87185 USA

来源：

SURFACE SCIENCE | 2000年 / 454卷 / 01期

基金：

英国工程与自然科学研究理事会;

关键词：

clusters; electron energy loss spectroscopy (EELS); self-assembly;

D O I：

10.1016/S0039-6028(00)00247-8

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：

Passivated metal (e.g. gold) nanoclusters consist of a metal particle core surrounded by a ligand coat. We have investigated films of gold particles passivated with alkanethiol (C8H17S) ligands deposited from solution onto a graphite surface using high-resolution electron energy loss spectroscopy (HREELS). Vibrational modes of the CH, groups of the ligands are observed, together with their overtones. Incident energy dependent measurements show an enhancement in intensity of these vibrational modes at a specific energy, similar to 10 eV, consistent with a negative ion resonance state. This observation is compared with previous studies of self-assembled monolayers of thiols on the Au (111) surface. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：963 / 967

页数：5

共 23 条

[1] Optical absorption spectra of nanocrystal gold molecules [J].