1. Department of Chemistry and Nano Science
2. Ewha Womans University
3. Seoul 120-750
4. Korea
5. School of Mechanical Engineering
6. Yonsei University
7. Seoul 120-749
8. Institute of Advanced Composite Materials
9. Korea Institute of Science and Technology (KIST)
10. Jeonbuk 55324
11. Department of Physics
12. Central Michigan University
13. USA
14. School of Physics
15. State Key Laboratory of Crystal Materials
16. Shandong University
17. Jinan
18. China