A1 Refereed original research article in a scientific journal
Photoelectron spectroscopy study of irradiation damage and metal-sulfur bonds of thiol on silver and copper surfaces
Authors: Laiho T, Leiro JA, Heinonen MH, Mattila SS, Lukkari J
Publisher: ELSEVIER SCIENCE BV
Publication year: 2005
Journal: Journal of Electron Spectroscopy and Related Phenomena
Journal name in source: JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA
Journal acronym: J ELECTRON SPECTROSC
Volume: 142
Issue: 2
First page : 105
Last page: 112
Number of pages: 8
ISSN: 0368-2048
DOI: https://doi.org/10.1016/j.elspec.2004.10.001
Self-assembled l-dodecanethiol monolayers (SAMs) on silver and copper surfaces have been characterized with X-ray photoelectron spectroscopy (XPS) using both the synchrotron radiation and conventional Mg Kalpha excitation. Irradiation-induced changes in thiolate SAMs on Cu and Ag were observed. The identification of the sulfur species has been done. Results obtained confirm earlier studies of n-alkanethiols on silver. On copper (C12S/Cu), the observed S 2p spectrum is quite broad but the use of different excitation energies enabled us to identify four sulfur species on the surface. A S 2P(3/2) component of copper thiolate is observed at 162.6 eV. Three more doublets (161.9 eV, 163.2 eV and 163.8 eV) have been observed to develop during irradiation and they are assigned to chemisorbed sulfur on copper, to different dialkylsulfides and to sulfur-sulfur bonding, (C) 2004 Elsevier B.V. All rights reserved.
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