1. Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523-1872, United States
2. Materials Sciences Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, California 94720, United States
3. Department of Materials Science and Engineering, University of California, Berkeley, California 94720, United States
4. Department of Chemistry, Stony Brook University, Stony Brook, New York 11790-3400, United States
5. Department of Applied Physics and Applied Mathematics, Columbia University, New York, New York 10027, United States
6. Department of Materials Science and Engineering, University of Michigan, 2006 H. H. Dow, Ann Arbor, Michigan 48109, United States
7. Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton, New York 11973, United States
8. Molecular Foundry, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, California 94720, United States