A1 Refereed original research article in a scientific journal
Chemisorption of alkyl thiols and S-alkyl thiosulfates on Pt(111) and polycrystalline platinum surfaces
Authors: Laiho T, Lukkari J, Meretoja M, Laajalehto K, Kankare J, Leiro JA
Publisher: ELSEVIER SCIENCE BV
Publication year: 2005
Journal: Surface Science
Journal name in source: SURFACE SCIENCE
Journal acronym: SURF SCI
Volume: 584
Issue: 1
First page : 83
Last page: 89
Number of pages: 7
ISSN: 0039-6028
DOI: https://doi.org/10.1016/j.susc.2005.02.059
Abstract
The self-assembled monolayers prepared from 1-dodecanethiol (C12SH) or S-dodecylthio sulfate (Bunte salt, C12SSO3Na) have been characterised on polycrystalline gold and platinum surfaces and on Pt(111). Contact angle and impedance measurements show that the film quality decreases in the order Au/C12SH > Pt/C12SH similar to Au/C12SSO3-Na > Pt/C12S SO3Na. XPS measurements show that the S-SO3 bond of organic thiosulfates is broken on platinum surfaces and the state of the surface-bound sulfur is indistinguishable from that of thiolate. On platinum three sulfur species are formed upon SAM formation and we suggest that the catalytic activity of platinum is responsible for their existence in pristine monolayers. (c) 2005 Elsevier B.V. All rights reserved.
The self-assembled monolayers prepared from 1-dodecanethiol (C12SH) or S-dodecylthio sulfate (Bunte salt, C12SSO3Na) have been characterised on polycrystalline gold and platinum surfaces and on Pt(111). Contact angle and impedance measurements show that the film quality decreases in the order Au/C12SH > Pt/C12SH similar to Au/C12SSO3-Na > Pt/C12S SO3Na. XPS measurements show that the S-SO3 bond of organic thiosulfates is broken on platinum surfaces and the state of the surface-bound sulfur is indistinguishable from that of thiolate. On platinum three sulfur species are formed upon SAM formation and we suggest that the catalytic activity of platinum is responsible for their existence in pristine monolayers. (c) 2005 Elsevier B.V. All rights reserved.
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