Electrochemical fabrication of highly ordered semiconductor and metallic nanowire arrays

In this article, we report the fabrication of highly ordered TiO2 nanowire arrays by anodic oxidative hydrolysis of TiCl3 within a hexagonal close-packed nanochannel alumina (NCA). The single-crystalline anatase TiO2 nanowires with diameters about 15 nm and lengths about 6 mum are obtained after annealing at 500 degreesC. Finally, the fabrication and characterization of highly ordered Au and Ni nanowire arrays with selectable diameters are also reported.