1. Department of Chemistry, Lehigh University, Bethlehem, Pennsylvania 18015, United States
2. Department of Chemistry, Tsinghua University, Beijing 100084, P.R. China
3. X-ray Science Division, Advanced
Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, United States
4. CSRRI-IIT, MRCAT, Sector 10,
Building 433B, Argonne National Laboratory, Argonne, Illinois 60439, United States
5. Physics Department, Illinois Institute of Technology, Chicago, Illinois 60616, United
States
6. Department of Polymer
Science, The University of Akron, Akron,
Ohio 44325, United
States