1. Department of Ultrasound West China Hospital College of Polymer Science and Engineering State Key Laboratory of Polymer Materials Engineering Sichuan University Chengdu 610065 China
2. Department of Chemistry and Biochemistry Freie Universität Berlin Takustraße 3 Berlin 14195 Germany
3. College of Biomass Science and Engineering Sichuan University Chengdu 610065 China
4. Functional Materials Department of Chemistry Technische Universität Berlin Hardenbergstraße 40 Berlin 10623 Germany
5. National Engineering Research Center for Biomaterials Sichuan University Chengdu 610064 China