Apatite formation in Hanksʹ solution on β-Ca2SiO4 films prepared by MOCVD

β-Ca2SiO4 film in a single phase was prepared by metalorganic chemical vapor deposition (MOCVD) and immersed in Hanksʹ solution to evaluate the apatite formation ability. Apatite formed on the surface of the β-Ca2SiO4 film after immersion for 1 d. A dense apatite layer covered the β-Ca2SiO4 film surface after immersion for 7 d. CO32− and PO43− groups were identified by Fourier transform-infrared spectroscopy (FT-IR) after immersion for 1 d. The shape of apatite changed from granular to needle-like to densely packed granular with increasing immersion time from 1 d to 14 d.