A dielectrophoretic particle and cell concentrator

D. J. Bennett, B. Khusid, P. C. Galambos, C. D. James, M. Okandan

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

1 Scopus citations

Abstract

An experimental and theoretical study is described concerning the dielectric motion of particles in a suspension subject to high-gradient AC electric fields. The experiments were performed on very dilute suspensions of polystyrene latex beads in DI water. Several experiments were run using channels designed with Sandia National Laboratories' SwIFT™ (Surface Micromachining with Integrated Fluidic Technologies) process. The SwIFT™ process allows for the closest spacing of electrodes achievable using photolithographic patterning. A sinusoidal AC electric field was applied between two electrodes using 10 V peak-to-peak (ptp) and 30 MHz. Negative dielectrophoresis is observed with particles moving towards the low field gradient. The Computational Fluid Dynamics Research Corporation Code (CFDRC) was used to calculate the field gradient. Particle polarizability was calculated by measuring the concentration dependence of the permittivity at specified frequencies using an impedance analyzer.

Original languageEnglish (US)
Title of host publicationTRANSDUCERS 2003 - 12th International Conference on Solid-State Sensors, Actuators and Microsystems, Digest of Technical Papers
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages1225-1228
Number of pages4
ISBN (Electronic)0780377311, 9780780377318
DOIs
StatePublished - Jan 1 2003
Event12th International Conference on Solid-State Sensors, Actuators and Microsystems, TRANSDUCERS 2003 - Digest of Technical Papers - Boston, United States
Duration: Jun 8 2003Jun 12 2003

Publication series

NameTRANSDUCERS 2003 - 12th International Conference on Solid-State Sensors, Actuators and Microsystems, Digest of Technical Papers
Volume2

Other

Other12th International Conference on Solid-State Sensors, Actuators and Microsystems, TRANSDUCERS 2003 - Digest of Technical Papers
CountryUnited States
CityBoston
Period6/8/036/12/03

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

Keywords

  • Computational fluid dynamics
  • Dielectrics
  • Dielectrophoresis
  • Electric fields
  • Electrodes
  • Fluidic microsystems
  • Laboratories
  • Microfluidics
  • Micromachining
  • Polarization

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