[19a-H113-1~10] 6.5 Surface Physics, Vacuum

[19a-H113-7] Nanoscale Analysis of Titanium Dioxide Surfaces Immersed in Simulated Body Fluid

〇Akira Sasahara¹, Tatsuya Murakami¹, Le Tu¹, Kentaro Tsukuda¹, Masahiko Tomitori¹ (1.JAIST)

Keywords:titanium dioxide,calcium phosphate,simulated body fluid

Atomic force microscopy and X-ray photoelectron spectroscopy techniques were used to study the precipitation of calcium phosphate on rutile titanium dioxide (TiO₂) (110) surfaces immersed in Hank's buffered salt solution. While calcium phosphate nanoparticles appeared on the TiO₂ surface annealed in air then subsequently immersed, the particles were not observed on the surface annealed in air followed by further annealing in O₂. Further to this, boiling the air-annealed surface in water also suppressed the precipitation of the particles. The precipitation process of calcium phosphate is discussed on the basis of the surface structure of the TiO₂.