1. Key Laboratory of Applied Surface and Colloid Chemistry
2. Ministry of Education
3. School of Chemistry and Chemical Engineering
4. Shaanxi Normal University
5. Xi'an 710119
6. Department of Chemistry
7. University of Montreal
8. CP 6128 Succursale Centre Ville
9. Montreal
10. Canada
11. School of Materials Science and Engineering
12. Beijing University of Chemical Technology
13. Beijing 100029
14. P. R. China
15. Laboratory of Polymer Chemistry
16. PB 55
17. University of Helsinki
18. Helsinki FI00140