1. Department of Physics, Virginia Tech, Blacksburg, Virginia 24061, United States
2. Center for Soft Matter and Biological Physics, Virginia Tech, Blacksburg, Virginia 24061, United States
3. Department of Physics, The University of Sheffield, Sheffield S3 7RH, U.K.
4. Department of Material Science and Engineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
5. Department of Material Science and Engineering, Cornell University, Ithaca, New York 14850, United States
6. Department of Chemical and Biological Engineering, The University of Sheffield, Sheffield S1 3JD, U.K.
7. Second Target Station, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830, United States
8. Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830, United States
9. Department of Chemistry, The University of Sheffield, Sheffield S3 7HF, U.K.
10. Macromolecular Innovation Institute, Virginia Tech, Blacksburg, Virginia 24061, United States