Apatite formation on rutile type TiO_2 films formed by laser irradiation

摘要

Titanium oxide-coating films exhibit a wide variety ofnphysical properties, allowing them to be useful in manynapplications such as photocatalysis [1], gas sensors [2],nmedical implants [3] and optical active coatings [4].nAmong these applications, bioactive materials have receivednconsiderable attention due to their high biocompatibilitynin the living-body [5–7]. Anatase, one of thenTiO2 polymorphisms, is considered to be appropriate fornbone-like apatite formation. Therefore, numerous studiesnhave been carried out on the deposition of anatase filmsnby physical vapor deposition, chemical vapor depositionn[8–11] and sol-gel method [12]. On the other hand, littlenattention has been paid whether rutile crystals have thenapatite-forming ability when soaked in SBF or implantednin the living-body