1. CAS Center for Excellence in Nanoscience
2. Beijing Key Laboratory of Micro-nano Energy and Sensor
3. Beijing Institute of Nanoenergy and Nanosystems
4. Chinese Academy of Sciences
5. Beijing 100083
6. State Key Laboratory of Nuclear Physics and Technology
7. Department of Technical Physics
8. School of Physics
9. Peking University
10. Beijing 100871
11. College of Energy
12. Xiamen University
13. Xiamen
14. P. R. China