1. Condensed
Matter Physics and Materials Sciences Department, Brookhaven National Laboratory, Building 480, Upton New
York 11973, United States
2. Department
of Chemistry, State University of New York at Stony Brook, Stony Brook, New York 11794-3400, United States
3. Center
for Functional Nanomaterials, Brookhaven National Laboratory, Building 735, Upton, New
York 11973, United States
4. Materials
Science and Engineering Laboratory, National Institute of Standards and Technology, Gaithersburg, Maryland 20889, United States
5. School
of Marine and Atmospheric Sciences, State University of New York at Stony Brook, Stony Brook, New York 11794-5000, United States