High resolution X-ray photoelectron spectroscopy of 3-mercaptopropionic acid self-assembled films

被引：38

作者：

Gonella, G

Cavalleri, O

Terreni, S

Cvetko, D

Floreano, L

Morgante, A

Canepa, M

Rolandi, R

机构：

[1] Univ Genoa, INFM, I-16146 Genoa, Italy

[2] Univ Genoa, Dipartimento Fis, I-16146 Genoa, Italy

[3] INFM, Lab TASC, Trieste, Italy

[4] Univ Ljubljana, Dept Phys, Ljubljana 61000, Slovenia

[5] Sincrotrone, Trieste, Italy

[6] Univ Trieste, Dipartimento Fis, Trieste, Italy

来源：

SURFACE SCIENCE | 2004年 / 566卷

关键词：

self-assembly; X-ray photoelectron spectroscopy; gold; physical adsorption;

D O I：

10.1016/j.susc.2004.05.125

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：

Self-assembled layers of 3-mercaptopropionic acid deposited on Au(111) from solution have been investigated with synchrotron based, high resolution X-ray photoemission spectroscopy. Results obtained from pristine, X-ray irradiated and heated samples are reported. Pristine samples are characterized by an intense, dominant S 2p state at a binding energy of 162 eV (2P(3/2) level) assigned to thiolates. A less intense doublet around 163.3 eV is tentatively attributed to physisorbed molecules forming a partially occupied upper layer. Irradiation and heating cause the development of a third S 2p doublet around 161 eV which, by comparison with the literature, is assigned to atomic sulfur generated by SC bond scission. The decrease of the C ls and O ls signals with annealing and irradiation, together with the increase of the S 2p state assigned to atomic sulfur, confirms the breaking of the C-S bond. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：638 / 643

页数：6

共 32 条

[1] Observation of outermost surface layer of 4-mercaptohydrocynnamic acid self-assembled film on Au(111) by Penning ionization electron spectroscopy [J].