Transient electrophoretic motion of charged particles through an L-shaped microchannel

Ye Ai, Seungkyung Park, Junjie Zhu, Xiangchun Xuan, Ali Beskok, Sang W. Joo, Shizhi Qian

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Direct current dielectrophoretic (DC-DEP) effects on the electrophoretic motion of charged polystyrene particles through an L-shaped microchannel were experimentally and numerically studied. In addition to the electrostatic and hydrodynamic forces, particles experience a negative DC-DEP force arising from the interaction between the dielectric particle and the induced spatially non-uniform electric field occurring around the corner of the L-shape microchannel. The latter force causes a cross-stream DEP motion so that the particle trajectory is shifted towards the outer corner of the turn. A twodimensional (2D) Lagrangian particle tracking model taking into account the induced DC-DEP effect was used to predict the particle trajectory shift through the L-shaped channel, which achieves quantitative agreement with the experimental data.

Original languageEnglish (US)
Title of host publicationProceedings of the ASME International Mechanical Engineering Congress and Exposition 2009, IMECE 2009
PublisherAmerican Society of Mechanical Engineers (ASME)
Pages785-789
Number of pages5
EditionPART B
ISBN (Print)9780791843857
DOIs
StatePublished - Jan 1 2010
EventASME 2009 International Mechanical Engineering Congress and Exposition, IMECE2009 - Lake Buena Vista, FL, United States
Duration: Nov 13 2009Nov 19 2009

Publication series

NameASME International Mechanical Engineering Congress and Exposition, Proceedings
NumberPART B
Volume12

Other

OtherASME 2009 International Mechanical Engineering Congress and Exposition, IMECE2009
CountryUnited States
CityLake Buena Vista, FL
Period11/13/0911/19/09

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Ai, Y., Park, S., Zhu, J., Xuan, X., Beskok, A., Joo, S. W., & Qian, S. (2010). Transient electrophoretic motion of charged particles through an L-shaped microchannel. In Proceedings of the ASME International Mechanical Engineering Congress and Exposition 2009, IMECE 2009 (PART B ed., pp. 785-789). (ASME International Mechanical Engineering Congress and Exposition, Proceedings; Vol. 12, No. PART B). American Society of Mechanical Engineers (ASME). https://doi.org/10.1115/IMECE2009-12891