1. Department of materials, University of Science and Technology Beijing, Beijing, P. R. China
2. Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing, P. R. China
3. Beijing Bayi Space Liquid Crystal Material Technology Company, Beijing Key Laboratory of Liquid Crystal Materials Analysis and Application Technology, Beijing, P. R. China
4. Yantai Xianhua Chemical Technology Company, Yantai, P. R. China
5. Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, Peking University, Beijing, P.R. China
6. Beijing Tongren Eye Center, Capital Medical University, Beijing, P.R. China