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. 2020 Apr 25;11(5):451. doi: 10.3390/mi11050451

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© 2020 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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Effect of the electric field on the dielectrophoretic focusing of 5 µm diameter particles in the symmetric ratchet microchannel: (a) Comparison of the experimentally obtained and numerically predicted (top half of the left- and right-most images only) particle trajectories (traveling from left to right) at varying locations of the microchannel under 125 (bottom row), 250 (middle row), and 500 V/cm (top row) electric fields, respectively; (b) Comparison of the experimentally measured (symbols with error bars) and numerically calculated (curves) particle focusing ratios among the three electric fields.