Fabrication of Nano Porous Aluminum Oxide via a two-step Anodisation Process

摘要

In this study, we report the fabrication of nano porous aluminum oxide film from high purity aluminium foil via a two-step anodisation process controlled by a constant direct current potential ranging from 40 - 60 V from a DC power supply. The anodisation process was conducted at 20°C in an electrochemical cell with the Al foil acting as anode, Pt as cathode and an acidic bath as electrolyte. Porous aluminium oxide films of pore diameters ranging between 30 - 90 nm were successfully fabricated. The morphologies and phase compositions of the anodized porous alumina films were investigated using scanning electron microscopy (SEM) and x-ray diffraction (XRD) for characterizations.