Dissociative and non-dissociative adsorption of selenophene on Au [formula omitted] depending on the preparation method

Selenophene (C 4H 4Se) monolayers on Au(1 1 1) were prepared by two different methods: ultrahigh vacuum (UHV) and atmospheric vapor adsorption method. Near-edge X-ray absorption fine structure (NEXAFS) and X-ray photoelectron spectroscopy (XPS) results clearly indicate that the two monolayers are in...

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Bibliographic Details
Published inChemical physics letters Vol. 350; no. 5; pp. 466 - 472
Main Authors Kondoh, H, Nakai, I, Nambu, A, Ohta, T, Nakamura, T, Kimura, R, Matsumoto, M
Format Journal Article
LanguageEnglish
Published Amsterdam Elsevier B.V 28.12.2001
Elsevier Science
Subjects
Chemistry
Exact sciences and technology
General and physical chemistry
Solid-gas interface
Surface physical chemistry
Gas solid adsorption
Monolayer
Gold
Five membered ring
Selenium heterocycle
Preparation
Photoelectron spectrometry
Transition metal
Crystal face
X ray
Ultrahigh vacuum
Selenium Organic compounds
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Summary:Selenophene (C 4H 4Se) monolayers on Au(1 1 1) were prepared by two different methods: ultrahigh vacuum (UHV) and atmospheric vapor adsorption method. Near-edge X-ray absorption fine structure (NEXAFS) and X-ray photoelectron spectroscopy (XPS) results clearly indicate that the two monolayers are in different chemical forms; selenophene is molecularly adsorbed under UHV condition, while it is dissociatively chemisorbed via the C–Se bond cleavage under atmospheric condition. The dissociative chemisorption under atmospheric condition is interpreted in terms of the trapping mediated adsorption in the presence of a high-pressure ambient gas phase.
ISSN:0009-2614
1873-4448
DOI:10.1016/S0009-2614(01)01335-5