Hydroxylation and crystallization of electropolished titanium surface

M. Jobin, M. Taborelli, R. Emch, Frederic Zenhausern, P. Descouts

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

Surface properties and dissociative chemisorption of water on titanium-oxide surfaces are of particular interest for the biocompatibility of this material. Scanning force microscopy images of electropolished titanium samples and of thin films of titanium evaporated under vacuum show a similar topography with a grain size of 30 nm. Mass spectrometer thermal desorption spectroscopy displays two peaks for e/m = 18, at 380 and 520 K corresponding to adsorbed water molecules and hydroxyl groups, respectively. Auger spectra show the segregation toward the surface of chlorine from the metal-oxide interface upon heating at 720 K and of sulphur from the bulk after annealing at 950 K. The oxygen diffusion from the surface toward the bulk during the heating process induces a metallic behaviour of the surface layer which is revealed by tunneling spectroscopy: the semiconducting gap present in dI/dV curves for the air-exposed sample vanishes upon annealing. STM images of the annealed surface show the presence of tiny crystallites of a few nm in size.

Original languageEnglish (US)
Pages (from-to)637-643
Number of pages7
JournalUltramicroscopy
Volume42-44
Issue numberPART 1
DOIs
StatePublished - 1992
Externally publishedYes

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Hydroxylation
Crystallization
Titanium
titanium
crystallization
annealing
heating
Annealing
Thermal desorption spectroscopy
biocompatibility
titanium oxides
Industrial heating
chemisorption
Water
surface properties
water
spectroscopy
mass spectrometers
crystallites
Titanium oxides

ASJC Scopus subject areas

  • Materials Science(all)
  • Instrumentation

Cite this

Hydroxylation and crystallization of electropolished titanium surface. / Jobin, M.; Taborelli, M.; Emch, R.; Zenhausern, Frederic; Descouts, P.

In: Ultramicroscopy, Vol. 42-44, No. PART 1, 1992, p. 637-643.

Research output: Contribution to journalArticle

Jobin, M. ; Taborelli, M. ; Emch, R. ; Zenhausern, Frederic ; Descouts, P. / Hydroxylation and crystallization of electropolished titanium surface. In: Ultramicroscopy. 1992 ; Vol. 42-44, No. PART 1. pp. 637-643.
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