Field-induced dielectrophoresis and phase separation for manipulating particles in microfluidics

D. J. Bennett, Boris Khusid, C. D. James, P. C. Galambos, M. Okandan, D. Jacqmin, A. Kumar, Z. Qiu, A. Acrivos

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

Abstract

We report observations of a new electric field- and shear-induced many-body phenomenon in the behavior of suspensions. Its origin is dielectrophoresis accompanied by the field-induced phase separation. As a result, a suspension undergoes a field-driven phase separation leading to the formation of a distinct boundary between regions enriched with and depleted of particles. The theoretical predictions are consistent with experimental data even though the model contains no fitting parameters. It is demonstrated that the field-induced dielectrophoresis accompanied by the phase separation provides a new method for concentrating particles in focused regions and for separating biological and non-biological materials, a critical step in the development of miniaturizing biological assays.

Original languageEnglish (US)
Title of host publication2004 NSTI Nanotechnology Conference and Trade Show - NSTI Nanotech 2004
EditorsM. Laudon, B. Romanowicz
Pages367-370
Number of pages4
StatePublished - Nov 2 2004
Event2004 NSTI Nanotechnology Conference and Trade Show - NSTI Nanotech 2004 - Boston, MA, United States
Duration: Mar 7 2004Mar 11 2004

Publication series

Name2004 NSTI Nanotechnology Conference and Trade Show - NSTI Nanotech 2004
Volume2

Other

Other2004 NSTI Nanotechnology Conference and Trade Show - NSTI Nanotech 2004
CountryUnited States
CityBoston, MA
Period3/7/043/11/04

All Science Journal Classification (ASJC) codes

  • Engineering(all)

Keywords

  • Concentrating particles
  • Dielectrophoresis
  • Field-induced phase separation
  • Separation of biological and non-biological materials

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