1. Shenzhen Geim Graphene Center
2. Tsinghua-Berkeley Shenzhen Institute & Institute of Materials Research
3. Tsinghua Shenzhen International Graduate School
4. Tsinghua University
5. Shenzhen 518055
6. Shanghai Synchrotron Radiation Facility
7. Shanghai Advanced Research Institute
8. Chinese Academy of Sciences
9. Shanghai 201210
10. China
11. Shenyang National Laboratory for Materials Sciences
12. Institute of Metal Research
13. Shenyang
14. P. R. China