1. Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton, New York 11973, United States
2. Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
3. Department of Chemistry, Stony Brook University, Stony Brook, New York 11794, United States
4. Energy Sciences Directorate, Brookhaven National Laboratory, Upton, New York 11973, United States
5. Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, New York 11794, United States
6. Materials Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
7. Department of Materials Science and Engineering, University of California at Berkeley, Berkeley, California 94720, United States