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

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

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 proceeding › Conference 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 language	English
Title of host publication	Advances in Bioceramics and Porous Ceramics V - A Collection of Papers Presented at the 36th International Conference on Advanced Ceramics and Composites, ICACC 2012
Pages	79-84
Number of pages	6
Edition	6
Publication status	Published - Apr 8 2013
Event	Advances in Bioceramics and Porous Ceramics V - 36th International Conference on Advanced Ceramics and Composites, ICACC 2012 - Daytona Beach, FL, United States Duration: Jan 22 2012 → Jan 27 2012

Publication series

Name	Ceramic Engineering and Science Proceedings
Number	6
Volume	33
ISSN (Print)	0196-6219

Other

Other	Advances in Bioceramics and Porous Ceramics V - 36th International Conference on Advanced Ceramics and Composites, ICACC 2012
Country	United States
City	Daytona Beach, FL
Period	1/22/12 → 1/27/12

ASJC Scopus subject areas

Ceramics and Composites
Materials Chemistry

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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).

UV-Irradiation modifies chemistry of anatase layer associated with in vitro apatite nucleation. / Uetsuki, Keita; Nakai, Shinsuke; Shirosaki, Yuki; Hayakawa, Satoshi; Osaka, Akiyoshi.

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. 2013. p. 79-84 (Ceramic Engineering and Science Proceedings; Vol. 33, No. 6).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

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 edn, Ceramic Engineering and Science Proceedings, no. 6, vol. 33, pp. 79-84, Advances in Bioceramics and Porous Ceramics V - 36th International Conference on Advanced Ceramics and Composites, ICACC 2012, Daytona Beach, FL, United States, 1/22/12.

Uetsuki K, Nakai S, Shirosaki Y, Hayakawa S, Osaka A. 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. 2013. p. 79-84. (Ceramic Engineering and Science Proceedings; 6).

Uetsuki, Keita ; Nakai, Shinsuke ; Shirosaki, Yuki ; Hayakawa, Satoshi ; Osaka, Akiyoshi. / UV-Irradiation modifies chemistry of anatase layer associated with in vitro apatite nucleation. 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. 2013. pp. 79-84 (Ceramic Engineering and Science Proceedings; 6).

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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.",

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AU - Uetsuki, Keita

AU - Nakai, Shinsuke

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AU - Hayakawa, Satoshi

AU - Osaka, Akiyoshi

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N2 - 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.

AB - 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.

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