1. Henan Key Laboratory of Photovoltaic Materials
2. School of Physics
3. Henan Normal University
4. Xinxiang 453007
5. China
6. Department of Physics
7. Government College University
8. Faisalabad
9. Pakistan
10. Department of Microbiology
11. The State Key Laboratory for New Ceramics & Fine Processing
12. School of Materials Science & Engineering
13. Tsinghua University
14. Beijing
15. University of Agriculture
16. Department of Physics and Astronomy
17. Graphene Research Institute
18. Sejong University
19. Seoul 05006
20. Korea
21. Advanced Key Laboratory for New Ceramics