Separation technique of sub-micron particles using electrokinetically driven flow

Takahiro Yamamoto, Shankar Devasenathipathy, Yohei Sato, Koichi Hishida

研究成果: Article査読

2 被引用数 (Scopus)


An electrokinetic separation and/or filtering technique of charged order one-micron diameter particles in solution is demonstrated for further development of a multi-phase microfluidic device. Two buffered particle-laden streams of different ionic conductivities are introduced through a simple T-shaped microchannel. The fluid is driven by both pressure and a DC electric field. Upon application of an electric field, the particles are extracted from the lower conductivity stream and stacked into the higher conductivity stream. Both particle density imaging and quantiative velocity fields using micron resolution particle image velocimetry are presented in order to investigate the flow and electric fields. Numerical simulations of the process in the conductivity gradient show the generation of a transverse electric field, consequently force acting on particles is selectively controlled in a simple geometry microcannel.

ジャーナルNippon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
出版ステータスPublished - 2004 9月

ASJC Scopus subject areas

  • 凝縮系物理学
  • 機械工学


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