1. School of Physics and Electronics
2. Hunan University
3. Changsha 410082
4. P. R. China
5. Ningbo Institute of Materials Technology and Engineering
6. Chinese Academy of Sciences
7. Ningbo
8. State Key Laboratory of Organic/Inorganic Composites
9. Beijing Advanced Innovation Center for Soft Matter Science and Engineering
10. Beijing University of Chemical Technology
11. Beijing 100029
12. School of Physics and Electronics Science
13. Joint Key Laboratory of the Ministry of Education
14. Institute of Applied Physics and Materials Engineering
15. University of Macau
16. Macau SAR 999078