1. Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
2. Department of Physics & Astronomy, Hunter College of the City University of New York, New York, New York 10065, United States
3. Department of Chemical Engineering and Materials Science, Michigan State University, East Lansing, Michigan 48864, United States
4. College of Polymer Science and Engineering, Sichuan University, Chengdu, Sichuan 610065, People’s Republic of China
5. Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States
6. Fakultät Physik, Technische Universität Dortmund, 44221 Dortmund, Germany
7. Institute of Physics, The University of Silesia in Katowice, SMCEBI 75 Pulku Piechoty 1A, 41-500 Chorzow, Poland