Water and ice in contact with octadecyl-trichlorosilane functionalized surfaces: A high resolution x-ray reflectivity study

DOI PDF 被引用文献2件
  • Markus Mezger
    Max-Planck-Institut für Metallforschung 1 , Heisenbergstr. 3, D-70569 Stuttgart, Germany
  • Sebastian Schöder
    Max-Planck-Institut für Metallforschung 1 , Heisenbergstr. 3, D-70569 Stuttgart, Germany
  • Harald Reichert
    Max-Planck-Institut für Metallforschung 1 , Heisenbergstr. 3, D-70569 Stuttgart, Germany
  • Heiko Schröder
    Max-Planck-Institut für Metallforschung 1 , Heisenbergstr. 3, D-70569 Stuttgart, Germany
  • John Okasinski
    Max-Planck-Institut für Metallforschung 1 , Heisenbergstr. 3, D-70569 Stuttgart, Germany
  • Veijo Honkimäki
    European Synchrotron Radiation Facility 2 , F-38043 Grenoble, France
  • John Ralston
    University of South Australia 3 Ian Wark Research Institute, , Mawson Lakes, South Australia 5095, Australia
  • Jörg Bilgram
    Laboratorium für Festkörperphysik 4 , ETH Zürich, CH-8093 Zürich, Switzerland
  • Roland Roth
    Max-Planck-Institut für Metallforschung 1 , Heisenbergstr. 3, D-70569 Stuttgart, Germany
  • Helmut Dosch
    Max-Planck-Institut für Metallforschung 1 , Heisenbergstr. 3, D-70569 Stuttgart, Germany

書誌事項

公開日
2008-06-24
DOI
  • 10.1063/1.2931574
公開者
AIP Publishing

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説明

<jats:p>We present a high energy x-ray reflectivity study of the density profiles of water and ice at hydrophobic and hydrophilic substrates. At the hydrophobic water/octadecyl-trichlorosilane (water-OTS) interface, we find clear evidence for a thin density depletion layer with an integrated density deficit corresponding to approximately 40% of a monolayer of water molecules. We discuss the experimental results in terms of a simple model of hydrophobic/hydrophilic solid-liquid interfaces. Our results also exclude the presence of nanobubbles. A detailed study of possible radiation damage induced by the intense x-ray beam at the dry OTS surface and at the ice-OTS, as well as at water-OTS interfaces, discloses that noticeable damage is only induced at the water-OTS interface, and thus points to the dominant role of highly mobile radicals formed in bulk water close to the interface.</jats:p>

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