1. Chemical, Materials and Biomolecular Engineering Department, Institute of Material Sciences, University of Connecticut, 97 North Eagleville Road, Storrs, Connecticut 06269-3136, United States
2. Raman Research Institute, Bangalore 560 080, India
3. Institute of Biophysics and Nanosystems Research, Austrian Academy of Sciences, Schmiedlstrasse 6, A-8042 Graz, Austria
4. Department of Physics, Brock University, St. Catherines, Ontario L2S 3A1, Canada
5. Department of Chemistry, University of Toronto, and Department of Chemical and Physical Sciences, University of Toronto Mississauga, 3359 Mississauga Road North, Mississauga, Ontario L6J 1J9, Canada
6. Oak Ridge National Laboratory, Neutron Sciences Directorate, Oak Ridge, Tennessee 37831-6475, United States
7. National Research Council, Canadian Neutron Beam Centre, Chalk River, Ontario K0J 1J0, Canada