1. The City University of New York Graduate Center, Department of Physics, New York, New York 10016-4309, United States
2. The City College of New York, The Benjamin Levich Institute, New York, New York 10031, United States
3. Department of Chemical Engineering, The City College of New York, New York, New York 10031, United States
4. Department of Physics, The City College of New York, New York, New York 10031, United States