A1 Vertaisarvioitu alkuperäisartikkeli tieteellisessä lehdessä
Chemisorption of alkyl thiols and S-alkyl thiosulfates on Pt(111) and polycrystalline platinum surfaces
Tekijät: Laiho T, Lukkari J, Meretoja M, Laajalehto K, Kankare J, Leiro JA
Kustantaja: ELSEVIER SCIENCE BV
Julkaisuvuosi: 2005
Journal: Surface Science
Tietokannassa oleva lehden nimi: SURFACE SCIENCE
Lehden akronyymi: SURF SCI
Vuosikerta: 584
Numero: 1
Aloitussivu: 83
Lopetussivu: 89
Sivujen määrä: 7
ISSN: 0039-6028
DOI: https://doi.org/10.1016/j.susc.2005.02.059
Tiivistelmä
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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