[G] Fundamentals of Biomaterials and Bio-responses

[23] Evaluation of Visible-light Induced Antibacterial Activity and Cytotoxicity of Nitrogen-added TiO₂ Films Formed by Two-step Thermal Oxidation

*Ryusuke KOIZUMI¹, Keita SHIMADA², Kyosuke UEDA³, Koyu ITO⁴, Kouetsu OGASAWARA⁴, Maiko FURUYA⁵, Hiroyasu KANETAKA⁵, Takayuki NARUSHIMA^3,6 (1. Graduate School of Engineering, Tohoku Univ. (M2), 2. Graduate School of Engineering, Tohoku Univ. (B4), 3. Graduate School of Engineering, Tohoku Univ., 4. IDAC, Tohoku Univ., 5. Graduate School of Dentistry, Tohoku Univ., 6. Research Center for Structural Materials, NIMS)

Keywords:可視光応答型TiO₂光触媒、Ti、熱酸化、抗菌、細胞毒性、インプラント

二段階熱酸化により作製した窒素含有TiO₂膜の、可視光照射下における抗菌性および細胞毒性を評価した。可視光照射0.9 ksにおいて、ルチル単相膜はR ~2（99%の菌が死滅）と優れた抗菌能を示した。