1. State Key Laboratory of Chemical Resource Engineering
2. Beijing Laboratory of Biomedical Materials
3. Beijing University of Chemical Technology
4. Beijing 100029
5. P. R. China
6. CAS Center for Excellence in Nanoscience, CAS Key Laboratory of Nanosystem and Hierarchical Fabrication
7. Division of Nanophotonics
8. National Center for Nanoscience and Technology (NCNST)
9. Beijing 100190