1. Department of Physics, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
2. Center for Complex Fluids Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
3. Department of Chemical Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
4. Department of Chemical Engineering, University of Florida, Gainesville, Florida 32611, United States
5. Department of Biomedical Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States