1. State Key Laboratory of Polymer Physics and Chemistry
2. Changchun Institute of Applied Chemistry
3. Chinese Academy of Sciences
4. Changchun 130022
5. P. R. China
6. Institute of Modern Physics
7. Chinese Academy of Science
8. Lanzhou 730000
9. Department of Chemical Engineering and Waterloo Institute for Nanotechnology
10. University of Waterloo
11. 200 University Avenue West
12. Ontario
13. Canada N2L 3G1