1. Department
of Chemistry, State University of New York at Stony Brook, Stony Brook, New York 11794-3400, United States
2. Department
of Physics, Villanova University, Mendel Hall, 800 Lancaster Avenue, Villanova, Pennsylvania 19085, United States
3. Centro Brasileiro de Pesquisas Físicas, Rua Xavier Sigaud 150, 222909-180 Rio de Janeiro, Brazil
4. Condensed
Matter Physics and Materials Sciences Department, Brookhaven National Laboratory, Building 480, Upton, New
York 11973, United States
5. Department
of Applied Physics and Applied Mathematics, Columbia University, New York, New York 10027, United States
6. Photon
Sciences Directorate, Brookhaven National Laboratory, Building
741, Upton, New York 11973, United States
7. Center
for
Functional Nanomaterials, Brookhaven National Laboratory, Building
735, Upton, New York 11973, United States