1. State Key Laboratory of Crystal Materials
2. Shandong University
3. 250100 Jinan
4. PR China
5. Hefei National Laboratory for Physical Sciences at the Microscale
6. University of Science and Technology of China
7. Hefei 230026
8. China
9. Center for Bioengineering and Biotechnology
10. China University of Petroleum (East China)
11. 266580 Qingdao