1. Guangxi Key Laboratory for Relativity Astrophysics Center on Nanoenergy Research Guangxi Key Laboratory of Processing for Nonferrous Metal and Featured Materials School of Physical Science & Technology Guangxi University Nanning 530004 P. R. China
2. School of Chemistry and Physics Queensland University of Technology Brisbane Queensland 4000 Australia
3. Guangxi Key Laboratory of Precision Navigation Technology and Application Guilin University of Electronic Technology Guilin 541004 P. R. China
4. Australian Institute for Bioengineering and Nanotechnology The University of Queensland Brisbane Queensland 4072 Australia
5. School of Physics and Electronic & Electrical Engineering and Jiangsu Key Laboratory of Modern Measurement Technology and Intelligent Systems Huaiyin Normal University Huai'an 223300 P. R. China
6. Guangxi Key Laboratory of Information Material Engineering Research Center of Electronic Information Materials and Devices Ministry of Education School of Material Science and Engineering Guilin University of Electronic Technology Guilin 541004 P. R. China