1. Department of Chemistry, State University of New York at Stony Brook, Stony Brook, New York 11794-3400, United States
2. Center for Functional Nanomaterials, Building 735, Brookhaven National Laboratory, Upton, New York 11973, United States
3. School of Marine and Atmospheric Sciences, State University of New York at Stony Brook, Stony Brook, New York 11794-5000, United States
4. Condensed Matter Physics and Materials Science Division, Brookhaven National Laboratory, Building 480, Upton, New York 11973, United States