Preparation of TiO2 layers by spin coating-pyrolysis and in-vitro formation of calcium phosphate

Abstract

We have prepared nano-crystalline TiO2 layers on a soda-lime-silica glass substrate using titanium naphthenate in order to test the formation of calcium phosphate in simulated body fluid. The TiO2 layer was confirmed by X-ray diffraction analysis after annealing at 500oC. Field emission-scanning electron microscope and atomic force microscope observations revealed that the annealed layer undergone a homogeneous 2-dimensional grain growth, resulting in no observable increase of root mean square(RMS) roughness. After immersion in simulated body fluid, the surface of the TiO2 layer was wholly covered with calcium phosphate as well as relatively small amounts of other ions such as Na and Cl.