Abstract:

TiO₂ porous films were prepared by anodization with different patterns of applied voltage. The formation mechanism of TiO₂ porous films was discussed through experiment phenomena and SEM observation. The results showed that the formation of TiO₂ porous films by anodization was controlled by voltage, barrier thickness when one-step voltage method or continuous voltage method was applied.However, the formation was controlled by voltage, barrier thickness, and interface state of electrolyte/barrier when two-step voltage method was used. The range of nano-pore diameter and nano-pore density of the TiO₂ film could be extended with two-step voltage method in the same process condition.