Self-assembly and characterization of TiO2 spheres deposited on Ti substrate

Using TiO₂ from the hydrolysis of TiOSO₄ as the precursor, and polystyrene (PS) as the template, TiO₂/PS complex nanoparticles were successfully prepared through Layer-by-Layer self-assembly method. Then erased PS by heating, thus hollow sphere TiO₂ was attained. The synthesized materials were characterized by SEM and XRD, the results indicated that TiO₂ spheres were deposited on Ti substrate and the morphology, structure and the amount of TiO₂ on the surface were corresponding to PS concentration, reaction temperature and soaking time. In simulated body fluid (SBF), apatite was formed on the surface in 72 hours.