Bioactive titania gel layers formed by chemical treatment of Ti substrate with a H2O2/HCl solution

Xiao Xiang Wang, Satoshi Hayakawa, Kanji Tsuru, Akiyoshi Osaka

Research output: Contribution to journalArticlepeer-review

242 Citations (Scopus)


An amorphous titania gel layer was formed on the titanium surface after the titanium specimen was treated with a H2O2/0.1m HCl solution at 80°C. The thickness of the gel layer increased almost linearly with the period of the treatment. A subsequent heat treatment above 300°C transformed gradually the amorphous gel to the anatase crystal structure and the rutile started to appear after heat treatment at 600°C. Meanwhile, the densification of the gel occurred significantly after heat treatment above 700°C. Similar to the sol-gel derived titania gel coatings, titania gel layers obtained in the present study exhibited in vitro apatite deposition ability after the gel layers exceeded a minimum thickness (0.2 μm) and was subsequently heated in a proper temperature range (400-600°C).

Original languageEnglish
Pages (from-to)1353-1357
Number of pages5
Issue number5
Publication statusPublished - Mar 1 2002


  • Apatite deposition
  • Bioactivity
  • Surface modification
  • Titania gel
  • Titanium

ASJC Scopus subject areas

  • Bioengineering
  • Ceramics and Composites
  • Biophysics
  • Biomaterials
  • Mechanics of Materials


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