Ultraviolet irradiation had limited effects on enhancing in vitro apatite formation on sol-gel derived titania films

Akiyoshi Osaka; Tetsuya Shozui; Kanji Tsuru; Satoshi Haakawa

Ultraviolet irradiation had limited effects on enhancing in vitro apatite formation on sol-gel derived titania films

Akiyoshi Osaka, Tetsuya Shozui, Kanji Tsuru, Satoshi Haakawa

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

Abstract

As UV irradiation on titania causes several effects, such as decomposing organic substances and attaining super-hydrophilic surfaces. the present study explored the UV irradiation effects on apatite deposition on titania gel films (anatase) that were developed on a few substrates: pure titanium (Ti), stainless-steel (SUS316L). alumina (Al₂O₃) and glass slide (GS). Those substrates were dip-coated with a precursor sol (Ti(OC ₂H₅)₄ : C₂H₅OH : H ₂O : HNO₃ = 1 : 50 : 2 : 0.2) and heated at 500°C for 10 min before irradiated with UV light (365 nm. 170 mW/cm²) in air for 1 h. They were subsequently soaked in simulated body fluid (SBF. Kokubo solution) and their in vitro apatite formation was evaluated by X-ray diffractometly and scanning electron micrograph. It was found that the UV irradiation enhanced apatite formation on the titania gel film on Ti and SClS by shortening the induction time. However. least effects were found for the titania gel films on Al₂O₃) and GS as they did not deposit apatite within 7 days, even with the UV irradiation. These results indicated that IJV irradiation had limited effects to enhance in vitro apatite formation on the titania films. i.e., it depended on the substrates.

Original language	English
Title of host publication	Advances in Bioceramics and Porous Ceramics - A Collection of Papers Presented at the 32nd International Conference on Advanced Ceramics and Composites, ICACC 2008
Pages	199-210
Number of pages	12
Volume	29
Edition	7
Publication status	Published - 2009
Externally published	Yes
Event	Advances in Bioceramics and Porous Ceramics - 32nd International Conference on Advanced Ceramics and Composites, ICACC 2008 - Daytona Beach, FL, United States Duration: Jan 27 2008 → Feb 1 2008

Other

Other	Advances in Bioceramics and Porous Ceramics - 32nd International Conference on Advanced Ceramics and Composites, ICACC 2008
Country	United States
City	Daytona Beach, FL
Period	1/27/08 → 2/1/08

All Science Journal Classification (ASJC) codes

Ceramics and Composites
Materials Chemistry

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Osaka, A., Shozui, T., Tsuru, K., & Haakawa, S. (2009). Ultraviolet irradiation had limited effects on enhancing in vitro apatite formation on sol-gel derived titania films. In Advances in Bioceramics and Porous Ceramics - A Collection of Papers Presented at the 32nd International Conference on Advanced Ceramics and Composites, ICACC 2008 (7 ed., Vol. 29, pp. 199-210)

Ultraviolet irradiation had limited effects on enhancing in vitro apatite formation on sol-gel derived titania films. / Osaka, Akiyoshi; Shozui, Tetsuya; Tsuru, Kanji; Haakawa, Satoshi.

Advances in Bioceramics and Porous Ceramics - A Collection of Papers Presented at the 32nd International Conference on Advanced Ceramics and Composites, ICACC 2008. Vol. 29 7. ed. 2009. p. 199-210.

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

Osaka, A, Shozui, T, Tsuru, K & Haakawa, S 2009, Ultraviolet irradiation had limited effects on enhancing in vitro apatite formation on sol-gel derived titania films. in Advances in Bioceramics and Porous Ceramics - A Collection of Papers Presented at the 32nd International Conference on Advanced Ceramics and Composites, ICACC 2008. 7 edn, vol. 29, pp. 199-210, Advances in Bioceramics and Porous Ceramics - 32nd International Conference on Advanced Ceramics and Composites, ICACC 2008, Daytona Beach, FL, United States, 1/27/08.

Osaka, Akiyoshi ; Shozui, Tetsuya ; Tsuru, Kanji ; Haakawa, Satoshi. / Ultraviolet irradiation had limited effects on enhancing in vitro apatite formation on sol-gel derived titania films. Advances in Bioceramics and Porous Ceramics - A Collection of Papers Presented at the 32nd International Conference on Advanced Ceramics and Composites, ICACC 2008. Vol. 29 7. ed. 2009. pp. 199-210

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abstract = "As UV irradiation on titania causes several effects, such as decomposing organic substances and attaining super-hydrophilic surfaces. the present study explored the UV irradiation effects on apatite deposition on titania gel films (anatase) that were developed on a few substrates: pure titanium (Ti), stainless-steel (SUS316L). alumina (Al2O3) and glass slide (GS). Those substrates were dip-coated with a precursor sol (Ti(OC 2H5)4 : C2H5OH : H 2O : HNO3 = 1 : 50 : 2 : 0.2) and heated at 500°C for 10 min before irradiated with UV light (365 nm. 170 mW/cm2) in air for 1 h. They were subsequently soaked in simulated body fluid (SBF. Kokubo solution) and their in vitro apatite formation was evaluated by X-ray diffractometly and scanning electron micrograph. It was found that the UV irradiation enhanced apatite formation on the titania gel film on Ti and SClS by shortening the induction time. However. least effects were found for the titania gel films on Al2O3) and GS as they did not deposit apatite within 7 days, even with the UV irradiation. These results indicated that IJV irradiation had limited effects to enhance in vitro apatite formation on the titania films. i.e., it depended on the substrates.",

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AB - As UV irradiation on titania causes several effects, such as decomposing organic substances and attaining super-hydrophilic surfaces. the present study explored the UV irradiation effects on apatite deposition on titania gel films (anatase) that were developed on a few substrates: pure titanium (Ti), stainless-steel (SUS316L). alumina (Al2O3) and glass slide (GS). Those substrates were dip-coated with a precursor sol (Ti(OC 2H5)4 : C2H5OH : H 2O : HNO3 = 1 : 50 : 2 : 0.2) and heated at 500°C for 10 min before irradiated with UV light (365 nm. 170 mW/cm2) in air for 1 h. They were subsequently soaked in simulated body fluid (SBF. Kokubo solution) and their in vitro apatite formation was evaluated by X-ray diffractometly and scanning electron micrograph. It was found that the UV irradiation enhanced apatite formation on the titania gel film on Ti and SClS by shortening the induction time. However. least effects were found for the titania gel films on Al2O3) and GS as they did not deposit apatite within 7 days, even with the UV irradiation. These results indicated that IJV irradiation had limited effects to enhance in vitro apatite formation on the titania films. i.e., it depended on the substrates.

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