Synthesis of ZnGa 2O 4 hierarchical nanostructure by Au catalysts induced thermal evaporation

Abstract

In this paper, ZnGa 2O 4 hierarchical nanostructures with comb-like morphology are fabricated by a simple two-step chemical vapor deposition (CVD) method: first, the Ga 2O 3 nanowires were synthesized and employed as templates for the growth of ZnGa 2O 4 nanocombs; then, the as-prepared Ga 2O 3 nanowires were reacted with ZnO vapor to form ZnGa 2O 4 nanocombs. Before the reaction, the Au nanoparticles were deposited on the surfaces of Ga 2O 3 nanowires and used as catalysts to control the teeth growth of ZnGa 2O 4 nanocombs. The as-prepared ZnGa 2O 4 nanocombs were highly crystallized with cubic spinel structure. From the photoluminescence (PL) spectrum, a broad band emission in the visible light region was observed of as-prepared ZnGa 2O 4 nanocombs, which make it promising application as an optical material. © 2010 The Author(s).