Changing the shape of ZnO nanostructures by controlling Zn vapor release

Abstract

Our fabrication of ZnO nanostructures was based on a thermal evaporation process of ZnO powder without the presence of a catalyst. The ource material was pure ZnO powder mixed with different contents of graphite (molar ratio 1:1.2: 1:1.1: 1:1; 1:0.8, respectively). Temperature is the critical experimental parameter for the formation of different morphologies of ZnO nanostructures, Zn or Zn suboxide plays a crucial role for the nucléation of ZnO nanostructures. The structure of the deposited materials was investigated by X-ray diffraction, scanning electron microscopy. Photoluminescence measurements were performed