1. School of Physics and Nuclear Energy Engineering
2. Beihang University
3. Beijing 100191
4. P. R. China
5. Division of Materials Science
6. School of Materials Science and Engineering
7. Nanyang Technological University
8. Singapore
9. Department of Electrical and Electronic Engineering
10. University of Nottingham Ningbo China
11. 199 Taikang East Road
12. Ningbo 315100