1. Key Laboratory of Advanced Materials (MOE)
2. Department of Chemical Engineering
3. Tsinghua University
4. Beijing 100084
5. China
6. Physics Department and Shanghai Key Laboratory of Magnetic Resonance
7. School of Physics and Materials Science
8. East China Normal University
9. Shanghai 200062
10. School of Pharmacy and Department of Chemistry
11. University of Wisconsin-Madison
12. Madison
13. USA