In vitro bioactivity of anatase film obtained by direct deposition from aqueous titanium tetrafluoride solutions

Jin ming Wu, Satoshi Hayakawa, Kanji Tsuru, Akiyoshi Osaka

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

Well-crystallized anatase films were deposited on commercially available pure titanium substrates from an acid titanium tetrafluoride aqueous solution kept at 60 °C for 24 h. The anatase films consisted of dual layers that were different in topography: a dense inner layer strongly adhered to the Ti substrate and a porous outer layer. In vitro bioactivity of such films was evaluated by soaking them in a simulated body fluid (SBF) of the Kokubo solution to observe their ability to induce apatite deposition. The anatase films with a subsequent thermal treatment at a temperature range of 300-700 °C induced apatite deposition within 5 days. Apatite particles were also found to deposit within 7 days on the anatase films being heated at 800 °C, which involved much rutile due to direct air oxidation of the titanium substrate. When the heating temperature is lower than 200 °C, no apatite deposited on the films even after 10 days of soaking in the SBF solution. The improved in vitro bioactivity of the films subsequently heated over 300 °C was attributed to the elimination of fluorine.

Original languageEnglish
Pages (from-to)283-288
Number of pages6
JournalThin Solid Films
Volume414
Issue number2
Publication statusPublished - Jul 22 2002

Fingerprint

Bioactivity
anatase
Titanium dioxide
titanium
Titanium
Apatites
Apatite
apatites
body fluids
soaking
Body fluids
Substrates
Fluorine
titanium tetrafluoride
titanium dioxide
rutile
Topography
fluorine
elimination
topography

Keywords

  • Biomaterials
  • Crystallization
  • Titanium
  • Titanium oxide

ASJC Scopus subject areas

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

Cite this

In vitro bioactivity of anatase film obtained by direct deposition from aqueous titanium tetrafluoride solutions. / Wu, Jin ming; Hayakawa, Satoshi; Tsuru, Kanji; Osaka, Akiyoshi.

In: Thin Solid Films, Vol. 414, No. 2, 22.07.2002, p. 283-288.

Research output: Contribution to journalArticle

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