1. Department of Physics, The City College of New York, New York, New York 10031, United States
2. Department of Chemistry, University of Louisville, Louisville, Kentucky 40292, United States
3. Department of Biochemistry and Molecular Genetics and the James Brown Cancer Center, University of Louisville School of Medicine, Louisville, Kentucky 40292, United States
4. Graduate Programs of Physics, Chemistry and Biochemistry, The Graduate Center of CUNY, New York, New York 10016, United States