Combined field-induced dielectrophoresis and phase separation for manipulating particles in microfluidics

Dawn J. Bennett, Boris Khusid, Conrad D. James, Paul C. Galambos, Murat Okandan, David Jacqmin, Andreas Acrivos

Research output: Contribution to journalArticlepeer-review

40 Scopus citations

Abstract

The manipulation of particles in microfluidics by the use of combined field-induced dielectrophoresis and phase separation was investigated. The flowing suspensions were found to undergo a phase separation and to form a distinct front between regions enriched with and depleted of particles under the action of a high-gradient ac field and shear. This many-body phenomenon originating from interparticle electrical interactions was demonstrated to provide a method for concentrating particles in a focused region and for separating biological and nonbiological materials. An electrohydrodynamic model was used to describe the evolution of the particle patterns.

Original languageEnglish (US)
Pages (from-to)4866-4868
Number of pages3
JournalApplied Physics Letters
Volume83
Issue number23
DOIs
StatePublished - Dec 8 2003

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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