1. Department of Materials Physics and Chemistry
2. University of Science and Technology Beijing
3. Beijing
4. P. R. China
5. Department of Materials Science and Engineering
6. College of Engineering
7. Peking University
8. Beijing 100871
9. Qiushi Honors College, Tianjin University
10. Tianjin 300350
11. Department of Chemistry
12. Dalian Medical University
13. Dalian 116044
14. Department of Applied Statistics and Science
15. Xijing University
16. Xian 710123