[1] Laboratory of Thin Film and Electrics, Xiangfan University, Xiangfan 441053, China
[2] School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China
[3] Hubei Novel Reactr and Green Chemical Technology Key Laboratory, Key Laboratory for Green Chemical Process of Ministry of Eduction, Wuhan Institute of Technology, Wuhan 430073, China