Control of the microparticle position in the channel based on dielectrophoresis

Tomoyuki Yasukawa, Masato Suzuki, Hitoshi Shiku, Tomokazu Matsue

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)


We report here the control of the microparticles position within fluid flow based on its size by using dielectrophoresis (DEP) with a microelectrode array consisted of rectangular features with the different size of width and gap. 3 μm- and 10 μm-diameter particles were introduced into the channel with 300 μm height at 30 μl/min. An AC electric field (20 V peak-peak and 2 MHz) was then applied to microelectrode arrays to form dielectrophoretic fluid cage, resulting in a formation of flow paths with low electric fields on the arrays. The microparticles separately flow in line streams along the paths formed between the rectangular features of the arrays, the 3 μm-diameter particles mainly flow through the narrow path and 10 μm-diameter particles through the wide path. These results indicated that positions of two types of microparticles in the fluidic channel were easily separated and controlled using the n-DEP.

Original languageEnglish
Pages (from-to)400-403
Number of pages4
JournalSensors and Actuators B: Chemical
Issue number1
Publication statusPublished - 2009 Oct 12


  • Dielectrophoresis
  • Fluidic channel
  • Microelectrode arrays
  • Particle separation


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