Abstract
Advancements in understanding the lateral migration of particles have helped in enhanced separation in microfluidic devices. In this work, we investigate the effects of electrokinetics on the particle migration in a viscoelastic flow, where the electric field is applied parallel to the flow. Through experiments and theoretical analysis, we show that the interaction of electrokinetic and rheological effects can result in an enhancement in the migration by an order of magnitude. The theoretical analysis, in agreement with experiments, demonstrates that the particles can be focused at different equilibrium positions based on their intrinsic electrical properties.
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