On the structure and bonding of H2O adsorbed on Cu(110)

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Abstract

Several structural configurations of H2O related species adsorbed on the Cu(110) surface have been studied by combining electron stimulated desorption angular distribution (ESDIAD), TDS, LEED and AES measurements, emphasizing local order and some controversial issues. Above ~ 0.1 L exposure at 90 K, H2O forms simultaneously hydrogen-bonded ice-like bilayers, giving rise to a perpendicular, sharp ESDIAD spot, and smaller clusters (possibly dimers) exhibiting a characteristic 4-spot ESDIAD pattern. The two species desorb at different temperatures, leaving at ~ 190 K a very small fraction of adsorbed hydroxyls inclined along the [001] azimuths. Restoration of the low temperature ESDIAD patterns upon re-adsorbing H2O on the hydroxyl-covered surface, reveals significant reorientation of the OH and formation of water-hydroxyl complexes. Oxygen pre-adsorbed in the low submonolayer range, as well as post-electron bombardment, markedly enhance H2O dissociation and complex formation.

Original languageEnglish
Pages (from-to)249-260
Number of pages12
JournalSurface Science
Volume321
Issue number3
DOIs
StatePublished - 20 Dec 1994

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry

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