Physical Review Letters
American Physical Society
Models and microfluidic experiments are presented of an electrophoretic separation technique in which charged particles whose mobilities exceed a tunable threshold are trapped between the crests of a longitudinal electric wave traveling through a stationary viscous fluid. The wave is created by applying periodic potentials to electrode arrays above and below a microchannel. Predicted average velocities agree with experiments and feature chaotic attractors for intermediate mobilities.
“Traveling-Wave Electrophoresis for Microfluidic Separations,” B. F. Edwards, A. T. Timperman, R. Lloyd Carroll, K. Jo, J. M. Mease, and J. E. Schiffbauer, Phys. Rev. Lett. 102, 076103 (2009) .