Size-controlled preparation of monodispersed ZnO nanorods

An aqueous solution of monodispersed ZnO nanorods was prepared with ZnCl2 as raw material and PVP as surfactant by a simple chemical reduction. The ZnO nanorods were characterized by means of transmission electron microscopy(TEM) X-ray diffraction(XRD), and their properties of ultraviolet and visible light absorption were also studied. The influence of experimental conditions, such as reaction time, quantity of PVP and concentration of Zn2+, etc. on the quality of the nanorods were discussed. Through altering Zn2+/PVP weight ratio, the size of ZnO could be controlled.