1. State Key Laboratory of Polymer Physics and Chemistry
2. Beijing National Laboratory for Molecular Sciences
3. Institute of Chemistry
4. Chinese Academy of Sciences
5. Beijing 100190
6. Department of Physics and Astronomy
7. Shanghai Jiaotong University
8. Shanghai 200240
9. PR China
10. Materials Science Division
11. Lawrence Berkeley National Laboratory
12. Berkeley
13. USA
14. Department of Polymer Science and Engineering