Ti nanorod arrays with periodic density fabricated via anodic technology

Fabrication of the anodic metals nanorod, especially Ti (titanium) nanorod arrays (Ti-NRAs), has attracted increasing attention in recent years. In this reported work, Ti-NRAs were prepared by applying a constant current of 200 mA under different anodisation conditions. The field emission scanning electron microscopy results showed that the density of the Ti-NRAs could be periodically tuned by the conditions of electrochemical anodisation. A possible formation mechanism is proposed to demonstrate the periodical tuning of the Ti-NRAs' density by the electrochemical anodisation time. This well-controlled synthesis approach may shed light on the fabrication of similar nanostructures of other metal materials.