1. Sichuan University, Chengdu, Sichuan 610065, P. R. China
2. Sichuan Nabis Silicon-Based Materials Technology Co., Ltd., Chengdu, Sichuan 615500, P. R. China
3. College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, P. R. China
4. School of Materials Science and Engineering, Sichuan University, Chengdu 610065, P. R. China
5. School of Chemical Engineering, University of Queensland, Brisbane, QLD 4072, Australia
6. Department of Physics, Center for Two-Dimensional and Layered Materials, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
7. Department of Chemistry, Center for Two-Dimensional and Layered Materials, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
8. Department of Materials Science and Engineering, Center for Two-Dimensional and Layered Materials, The Pennsylvania State University, University Park, Pennsylvania 16802, United States