ZnO nanorods grown by a pulsed laser deposition process

Abstract

ZnO nanorods were synthesized by a hot-wall type pulsed laser ablation process. At temperatures 500-800 degrees C, ZnO thin films and wrinkles were synthesized. Above 800 degrees C, vertically aligned ZnO nanorods were grown on the Si and sapphire substrate without any catalysts. The range of diameter was 100 similar to 300nm. When Au catalyst were deposited on the substrate prior to the deposition, the process range of ZnO nanorod become wider and the diameter of ZnO narrower. Especially, ZnO could be grown selectively along the pattern of Au catalyst with the aid of Au-Zn alloy.