Water vapor interactions with polycrystalline titanium surfaces

A. Azoulay, N. Shamir, V. Volterra, M. H. Mintz

Research output: Contribution to journalArticlepeer-review

14 Scopus citations


The initial interactions of water vapor with polycrystalline titanium surfaces were studied at room temperature. Measurements of water vapor surface accumulation were performed in a combined surface analysis system incorporating direct recoils spectrometry (DRS), Auger electron spectroscopy and X-ray photoelectron spectroscopy. The kinetics of accommodation of the water dissociation fragments (H, O and OH) displayed a complex behavior depending not only on the exposure dose but also on the exposure pressure. For a given exposure dose the efficiency of chemisorption increased with increasing exposure pressure. DRS measurements indicated the occurrence of clustered hydroxyl moieties with tilted O-H bonds formed even at very low surface coverage. A model which assumes two parallel routes of chemisorption, by direct collisions (Langmuir type) and by a precursor state is proposed to account for the observed behavior. The oxidation efficiency of water seemed to be much lower than that of oxygen. No Ti4+ states were detected even at high water exposure values. It is likely that hydroxyl species play an important role in the reduced oxidation efficiency of water.

Original languageEnglish
Pages (from-to)141-153
Number of pages13
JournalSurface Science
Issue number1-3
StatePublished - 1 Jan 1999


  • Adsorption kinetics
  • Auger electron spectroscopy
  • Chemisorption
  • Ion scattering spectroscopy
  • Ion-solid interactions
  • Models of surface kinetics
  • Polycrystalline surfaces
  • Scattering
  • Solid-gas interfaces
  • Titanium
  • Titanium-water interactions
  • Water

ASJC Scopus subject areas

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


Dive into the research topics of 'Water vapor interactions with polycrystalline titanium surfaces'. Together they form a unique fingerprint.

Cite this