ToF-SIMS study of 1-dodecanethiol adsorption on Au, Ag, Cu and Pt surfaces

被引：8

作者：

Laiho, Taina ^{[1
]}

Leiro, Jarkko A. ^{[1
]}

机构：

[1] Univ Turku, Mat Sci Lab, FIN-20014 Turku, Finland

来源：

SURFACE AND INTERFACE ANALYSIS | 2008年 / 40卷 / 01期

关键词：

self-assembled monolayers; time-of-flight secondary ion mass spectrometry; n-dodecanethiol; adsorption; surfaces;

D O I：

10.1002/sia.2722

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：

Time-of-flight secondary ion mass spectrometry (ToF-SIMS) has been used to perform a chemical analysis of long-chain thiol (CH3(CH2)(11)SH)-treated gold, silver, copper and platinum surfaces. All the mass peaks from positive and negative ion spectra within the range m/z = 0-2000 u are studied. ToF-SIMS data revealed that on gold, silver and copper substrates 1-dodecanethiol form dense standing-up phases, but on platinum being a catalytically active substrate, we were able to identify also surface-aligned parallel lying molecules in addition to a standing thiolate layer. Our study shows that when ToF-SIMS spectra are analyzed, not only the existence of oligomers but also metal + hydrocarbon fragments give information about the order of SAM. Copyright (c) 2008 John Wiley & Sons, Ltd.

引用

页码：51 / 59

页数：9

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