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Electrokinetic Manipulations of Microparticles in Curved Microchannels


Junjie Zhu, Mechanical Engineering, Clemson University, Clemson, SC
Tzuen-Rong Jeremy Tzeng, Biological Sciences, Clemson University, Clemson, SC
Xiangchun Xuan, Mechanical Engineering, Clemson University, Clemson, SC

We present electric field-mediated transport, focusing, and separation of microparticles in curved microchannels. Due to the curvature-induced electric field non-uniformity, particles experience negative dielectrophoresis when they migrate electrokinetically through a curved microchannel. This cross-stream particle motion is utilized to either focus particles into a tight stream near the outer wall, or separate particles by size to dissimilar streams in spiral microchannels.
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