Synthesis of zinc oxide thin film by anodizing

In this work, 99% purity zinc plates were anodized at potentiostatic conditions in distilled water at 25°C. The anodizing voltages were varied from 10 V to 30 V. The morphologies of the ZnO thin film were investigated by using scanning electron microscope (SEM) and the compositions were confirmed through the characterization using X-ray diffraction (XRD). The current versus time transients during the anodizing were recorded. SEM images show that thread-like nanostructures were present on the surface of Zn plates anodized at 25 V and 30 V. XRD patterns revealed that ZnO were present on all Zn plates anodized at anodizing voltages ranged from 10 V to 30 V. Current recorded during the anodizing process increased with the anodizing voltages due to the formation of thread-like nanostructures with lower electrical resistance.