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Passive Dielectrophoretic Focusing of Particles and Cells in Ratchet Microchannels
Focusing particles into a tight stream is critical for many microfluidic particle-handling devices such as flow cytometers and particle sorters. This work presents a fundamental study of the passive focusing of polystyrene particles in ratchet microchannels via direct current dielectrophoresis (DC DEP). We demonstrate using both experiments and simulation that particles achieve better focusing in a symmetric ratchet microchannel than in an asymmetric one, regardless of the particle movementdoi:10.3390/mi11050451 pmid:32344887 fatcat:jtrhaupdjne63dnfwd6o6r4dua