UV-Irradiation modifies chemistry of anatase layer associated with in vitro apatite nucleation

Keita Uetsuki, Shinsuke Nakai, Yuki Shirosaki, Satoshi Hayakawa, Akiyoshi Osaka

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Anatase layer was derived on pure titanium substrates by the H 2O2 treatment and calcination, on which UV was irradiated in air (UVa) and in ultra pure water (UVw). The effects of the UV irradiation on in vitro apatite formation in Kokubo's simulated body fluid were interpreted in terms of the modified chemistry of the anatase layer. The UVa treatment reduced apatite formation while the contrary effects were observed for the UVw treatment. From Ols X-ray photoelectron spectroscopic (XPS) analysis, those results were correlated to the change in the relative amount of Ti-OH (basic TiOH) and Ti-O(H)-Ti (acidic Ti-OH). Combining the XPS analysis and the apatite growth characteristics, i.e., the number and size of the semi-spherical particles and their surface-coverage, derived a plausible model: proper assembly of those sites (Ti-OH and Ti-O(H)-Ti) that collect both calcium and phosphate ions together should only give rise to induction of apatite nucleation.

Original languageEnglish
Title of host publicationAdvances in Bioceramics and Porous Ceramics V - A Collection of Papers Presented at the 36th International Conference on Advanced Ceramics and Composites, ICACC 2012
Pages79-84
Number of pages6
Edition6
Publication statusPublished - Apr 8 2013
EventAdvances in Bioceramics and Porous Ceramics V - 36th International Conference on Advanced Ceramics and Composites, ICACC 2012 - Daytona Beach, FL, United States
Duration: Jan 22 2012Jan 27 2012

Publication series

NameCeramic Engineering and Science Proceedings
Number6
Volume33
ISSN (Print)0196-6219

Other

OtherAdvances in Bioceramics and Porous Ceramics V - 36th International Conference on Advanced Ceramics and Composites, ICACC 2012
CountryUnited States
CityDaytona Beach, FL
Period1/22/121/27/12

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ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

Cite this

Uetsuki, K., Nakai, S., Shirosaki, Y., Hayakawa, S., & Osaka, A. (2013). UV-Irradiation modifies chemistry of anatase layer associated with in vitro apatite nucleation. In Advances in Bioceramics and Porous Ceramics V - A Collection of Papers Presented at the 36th International Conference on Advanced Ceramics and Composites, ICACC 2012 (6 ed., pp. 79-84). (Ceramic Engineering and Science Proceedings; Vol. 33, No. 6).