1. Soft Biomatter Laboratory, Department of Materials Science and Engineering, University of Virginia, Charlottesville, Virginia22904, United States
2. National Synchrotron Light Source-II, Brookhaven National Laboratory, Upton, New York11973, United States
3. Department of Chemical Engineering, University of Virginia, Charlottesville, Virginia22904, United States
4. Department of Biomedical Engineering, University of Virginia, Charlottesville, Virginia22904, United States