1. Department
of Polymer Science, College of Polymer Science and Polymer Engineering, The University of Akron, Akron, Ohio 44325, United States
2. X-ray
Science Division, Advanced Photon Source, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439, United States
3. Department
of Physics and Astronomy, McMaster University, Hamilton, Ontario, Canada, L8S 4M1
4. Department
of Materials Science and Nano Engineering and Department of Chemical
and Biomolecular Engineering, Brown School of Engineering, Rice University, Houston, Texas 77251, United States