1. Engineering Research Center in Biomaterials Sichuan University Chengdu Sichuan 610065 P. R. China
2. Laboratory of Ethnopharmacology West China School of Medicine Chengdu Sichuan 610065 P. R. China
3. West China Hospital Sichuan University Chengdu Sichuan 610065 P. R. China
4. Institute of Atomic and Molecular Physics Sichuan University Chengdu Sichuan 610065 P. R. China
5. Metrology Research Centre National Research Council Canada Ottawa Ontario K1A 0R6 Canada
6. School of Physical Science and Technology Sichuan University Chengdu Sichuan 610065 P. R. China
7. School of Chemical Engineering Sichuan University Chengdu Sichuan 610065 P. R. China
8. Shanghai Synchrotron Radiation Facility Shanghai Advanced Research Institute Chinese Academy of Sciences Shanghai 201204 P. R. China
9. Shanghai Institute of Applied Physics Chinese Academy of Sciences Shanghai 201800 P. R. China
10. State Key Laboratory of Polymer Materials Engineering Sichuan University Chengdu Sichuan 610065 P. R. China