1. Department
of Polymer Science, College of Polymer Science and Polymer Engineering, The University of Akron, Akron, Ohio 44325-3909, United States
2. College
of Polymer Science and Engineering, State Key Laboratory of Polymer
Materials Engineering, Sichuan University, Chengdu 610065, China
3. RIKEN CLST-JEOL
Collaboration Center, RIKEN, Yokohama 230-0045, Japan
4. JEOL RESONANCE
Inc., Tokyo 196-8558, Japan
5. South
China Advanced Institute for Soft Matter Science and Technology, South China University of Technology, Guangzhou 510640, China
6. X-ray
Science Division, Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois, 60439, United States