1. School of Chemistry and Biology Engineering University of Science and Technology Beijing
2. Beijing 100083
3. China
4. State Key Laboratory of Polymer Physics and Chemistry
5. Beijing National Laboratory for Molecular Sciences
6. Department of Physics
7. North Carolina State University
8. Raleigh
9. USA
10. Institute of Chemistry
11. Chinese Academy of Sciences
12. Beijing 100190
13. Advanced Light Source
14. Lawrence Berkeley National Laboratory
15. Berkeley