1. Department of Chemical
and Materials Engineering, Tunghai University, Taichung 40704, Taiwan
2. Department of Chemical
and Biomolecular Engineering, University of Pennsylvania, 220 South 33rd street, 301 Towne Building,
Philadelphia, Pennsylvania 19104-6391, United States
3. Department of Physics, Tougaloo College, Tougaloo, Mississippi
39174, United States
4. Department of Chemical
and Biological Engineering, Princeton University, A311 Engineering Quad, Princeton, New Jersey 08540, United States