Controllable Synthesis of ZnO Nanostructures via Template-Free Electrochemical Deposition at Low Temperature and their Optical Properties

Abstract

We report template-free electrochemical deposition method for preparing ZnO nanostructures arrays on indium tin oxides (ITO) glass substrate. Multiform ZnO nanostructures, such as nanotubes, nanorods with tower-like tips, cone-like tips and groove-like tips, are controllably synthesized at 60 °C, which is lower compared with the prepared temperatures of reported works. The results of XRD indicate the wurtzite ZnO nanostructures are single-crystalline and grow along the c-axis perpendicularly on the substrate. These findings have potential for the growth of high-quality ZnO nanostructures arrays and device applications.