1. Department of Applied Physics and Applied Mathematics, Columbia University, New York, New York 10027, United States
2. Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
3. Niels Bohr Institute, University of Copenhagen, Universitetsparken 5, DK-2100 Copenhagen, Denmark
4. Inorganic Chemistry and Center for NanoIntegration Duisburg-Essen (CENIDE), University of Duisburg-Essen, Universitaetsstr. 7, 45141 Essen, Germany
5. Department of Chemistry, State University of New York at Stony Brook, Stony Brook, New York 11794, United States
6. Department of Chemistry, Fordham University, 441 East Fordham Road, Bronx, New York 10548, United States
7. Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton, New York 11973, United States
8. Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States