1. State Key Laboratory of Molecular Engineering of Polymers
2. Department of Macromolecular Science
3. Fudan University
4. Shanghai 200433
5. China
6. Division of Theoretical Chemistry and Biology
7. School of Biotechnology
8. KTH Royal Institute of Technology
9. SE-10691 Stockholm
10. Sweden
11. Shanghai Key Lab of Polymer and Electrical Insulation
12. School of Chemistry and Chemical Engineering
13. Shanghai Jiaotong University
14. Shanghai 200240