1. Department of Physics, Brooklyn College of the City University of New York, Brooklyn, New York 11210, United States
2. Ph.D. Program in Physics, The Graduate Center of the City University of New York, New York, New York 10016, United States
3. Department of Chemistry, Lehman College of the City University of New York, Bronx, New York 10468, United States
4. Ph.D. Program in Chemistry, The Graduate Center of the City University of New York, New York, New York 10016, United States