1. Guilin Key Laboratory of Microelectronic Electrode Materials and Biological Nanomaterials, National Special Mineral Materials Engineering Technology Research Center & Guangxi Key Laboratory of Superhard Materials, China Monferrous Metal (Guilin)
Geology and Mining Co., Ltd., Guilin 541004, P. R. China
2. Guangxi Key Laboratory of Information Materials, Guilin University of Electronic Technology, Guilin 541004, P. R. China