In vitro apatite deposition on titania film derived from chemical treatment of Ti substrates with an oxysulfate solution containing hydrogen peroxide at low temperature

Fan Xiao, Kanji Tsuru, Satoshi Hayakawa, Akiyoshi Osaka

Research output: Contribution to journalArticle

60 Citations (Scopus)

Abstract

Thin titania film consisting of anatase and rutile was deposited on Ti substrates when soaked in a TiOSO4/H2O2 solution and aged in hot water. H2O2 corroded the Ti substrates, yielded a porous surface, and kept the solution from peptization. Thicker titania layers were formed in favor of both a greater supersaturation of Ti(IV) in the solution and a higher concentration of hydrated Ti(IV) derived by the corrosion of Ti and the hydrolysis of TiOSO4. The effects of aging in hot water were accounted for as they caused structural relaxation of the surface layer involving a rearrangement of Ti-OH and eliminating residual species like peroxide ions. Those titania layers were thus favored to deposit apatite when the Ti substrates were placed under a body environment, i.e. soaked in a simulated body fluid of Kokubo's recipe.

Original languageEnglish
Pages (from-to)271-276
Number of pages6
JournalThin Solid Films
Volume441
Issue number1-2
DOIs
Publication statusPublished - Sep 22 2003

Keywords

  • Apatite-forming ability
  • Hydrogen peroxide
  • Low temperature
  • Titania
  • Titanium oxysulfate

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Materials Chemistry

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