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Hydrodynamic density-based particle focusing in digital microfluidic systems

  • H. Rezaei Nejad
  • , E. Samiei
  • , A. Ahmadi
  • , M. Hoorfar
  • University of British Columbia

Research output: Contribution to Book/Report typesContribution to conference proceedingspeer-review

Abstract

A particle-separation technique for digital microfluidic system is introduced to focus and concentrate non-buoyant particles in micro-droplets. The proposed method utilizes the combined effects of the gravitational forces and the fluid flow inside the droplet. This technique does not require any additional electrical or magnetic modules. The desired hydrodynamic effect is created by spinning the droplet in a controlled fashion on a circular pattern of electrodes using electrowetting-on-dielectric technique. The fabricated device successfully focuses the non-buoyant silica beads of 5 μm in a region on the central electrode; whereas the focusing behavior is not observed for the neutrally polystyrene beads.

Original languageEnglish
Title of host publication18th International Conference on Miniaturized Systems for Chemistry and Life Sciences, MicroTAS 2014
PublisherChemical and Biological Microsystems Society
Pages1446-1448
Number of pages3
ISBN (Electronic)9780979806476
Publication statusPublished - 2014
Externally publishedYes
Event18th International Conference on Miniaturized Systems for Chemistry and Life Sciences, MicroTAS 2014 - San Antonio, United States
Duration: 26 Oct 201430 Oct 2014

Publication series

Name18th International Conference on Miniaturized Systems for Chemistry and Life Sciences, MicroTAS 2014

Conference

Conference18th International Conference on Miniaturized Systems for Chemistry and Life Sciences, MicroTAS 2014
Country/TerritoryUnited States
CitySan Antonio
Period26/10/1430/10/14

!!!Keywords

  • Digital microfluidics
  • Droplet
  • Hydrodynamics
  • Particle focusing

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