1. Hebei Key Laboratory of Functional Polymer School of Chemical Engineering and Technology Hebei University of Technology Tianjin 300130 P. R. China
2. Beijing National Laboratory for Condensed Matter Physics Institute of Physics Chinese Academy of Sciences Beijing 100190 P. R. China
3. Yangtze River Delta Physics Research Center Co. Ltd Liyang 213300 P. R. China
4. Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences Beijing 100190 P. R. China
5. Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan School of Chemistry and Chemical Engineering Shihezi University Shihezi 832003 P. R. China