1. Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing, People’s Republic of China
2. Department of Materials Physics and Chemistry, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, People’s Republic of China
3. Department of Materials Science and Engineering, School of Mechanical Electronic and Information Engineering, China University of Mining and Technology-Beijing, Beijing, People’s Republic of China
4. Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, Peking University, Beijing, People’s Republic of China
5. Liquid Crystal Institute, Kent State University, Kent, Ohio, USA