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  • Title: X-ray photoelectron spectroscopy and near-edge X-ray absorption fine structure study of water adsorption on pyridine-terminated thiolate self-assembled monolayers.
    Author: Zubavichus Y, Zharnikov M, Yang Y, Fuchs O, Umbach E, Heske C, Ulman A, Grunze M.
    Journal: Langmuir; 2004 Dec 07; 20(25):11022-9. PubMed ID: 15568854.
    Abstract:
    Adsorption of water on self-assembled monolayers (SAMs) of 4-(4-mercaptophenyl)pyridine on gold at low temperatures under ultrahigh vacuum conditions is studied by synchrotron radiation X-ray photoelectron and absorption spectroscopy. Water adsorption induces a strong modification of the chemical state of the pyridine N atoms at the SAM/ice interface, indicative for strong H bonding and partial proton transfer between water molecules and pyridine moieties. Additionally, the initial molecular orientation within the SAM is changed upon formation of an adsorbed water multilayer.
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