1. College of Polymer Science and Engineering and State Key Laboratory of Polymer Materials Engineering Sichuan University Chengdu 610065 P. R. China
2. Center for Plastic & Reconstructive Surgery Department of Plastic & Reconstructive Surgery Zhejiang Provincial People's Hospital (Affiliated People's Hospital Hangzhou Medical College) Hangzhou 310014 P. R. China
3. College of Physics Sichuan University Chengdu 610064 P. R. China
4. State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases & Dept. of Oral and Maxillofacial Surgery West China Hospital of Stomatology Sichuan University Chengdu 610041 P. R. China
5. College of Chemical Engineering Fuzhou University 2 Xueyuan Road Fuzhou 350108 P. R. China
6. Qingyuan Innovation Laboratory 1 Xueyuan Road Quanzhou 362801 P. R. China