1. Department of Physics
2. Northwest University
3. Xi'an
4. China
5. School of Physical Science and Technology
6. Lanzhou University
7. Lanzhou
8. Center for Applied Chemistry
9. Frontier Institute of Science and Technology
10. Xi'an Jiaotong University
11. Xi'an 710069
12. Shaanxi Key Laboratory of Degradable Biomedical Materials
13. State Key Laboratory of Applied Organic Chemistry
14. College of Chemistry and Chemical Engineering
15. Lanzhou 730000