Henry C. W. Chu¹, Stephen Garoff², Todd M. Przybycien³, Robert D. Tilton⁴ and Aditya S. Khair⁴, (1)Center for Complex Fluids Engineering and Department of Chemical Engineering, Carnegie Mellon University, Pittsburgh, PA, (2)Physics, Carnegie Mellon University, Pittsburgh, PA, (3)Department of Chemical Engineering and Department of Biomedical Engineering, Carnegie Mellon University, Pittsburgh, PA, (4)Department of Chemical Engineering, Carnegie Mellon University, Pittsburgh, PA