1. Department of Applied Physics and Applied Mathematics
2. Columbia University
3. New York 10027
4. USA
5. Nano-Science Center and Department of Chemistry
6. University of Copenhagen
7. 2100 Copenhagen Ø
8. Denmark
9. The Education Ministry Key Lab of Resource Chemistry
10. Shanghai Key Laboratory of Rare Earth Functional Materials
11. Optoelectronic Nano Materials and Devices Institute
12. Department of Chemistry
13. Shanghai Normal University