1. Department of Chemical and Biomolecular Engineering University of California Los Angeles CA 90095 USA
2. The Education Ministry Key Lab of Resource Chemistry and Shanghai Key Laboratory of Rare Earth Functional Materials School of Chemistry and Material Science Shanghai Normal University Shanghai 200234 China
3. Department of Mechanical and Aerospace Engineering University of California Los Angeles CA 90095 USA
4. Chemistry Division Brookhaven National Laboratory Upton NY 11973 USA