Author/Authors :
Chin, Yap Chi Universiti Kebangsaan Malaysia - Faculty of Science and Technology - School of Applied Physics, Malaysia , Yahaya, Muhammad Universiti Kebangsaan Malaysia - Faculty of Science Technology - School of Applied Physics, Malaysia , Mat Salleh, Muhamad Universiti Kebangsaan Malaysia - Institute of Microengineering and Nanoelectronic (IMEN), Malaysia , Fu, Dee Chang Universiti Kebangsaan Malaysia - Institute of Microengineering and Nanotechnology (IMEN), Malaysia
Abstract :
ZnO nanowires have been synthesized using a catalyst-free carbothermal reduction approach on SiO2-coated Si substrates in a flowing nitrogen atmosphere with a mixture of ZnO and graphite as reactants. The collected ZnO nanowires have been characterized by X-ray diffraction, scanning electron microscopy, energy dispersive spectroscopy and photoluminescence spectroscopy. Controlled growth of the ZnO nanowires was achieved by manipulating the reactants heating temperature from 700 to 1000 oC. It was found that the optimum temperature to synthesize high density and long ZnO nanowires was about 800 0C. The possible growth mechanism of ZnO nanowires is also proposed
Keywords :
ZnO , graphite , nanowires , carbothermal , scanning electron microscopy
