An evanescent-field technique for dielectrophoresis studies of colloidal particles

Michael P. Hughes, Hywel Morgan

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

Dielectrophoretic collection rates have been used to measure the dielectric properties of particles. For accurate collection-rate measurements it is important to be able to discriminate between particles collecting on an electrode and particles that are in the bulk solution. In this paper we demonstrate how evanescent-imaging methods can be used to observe only those particles that are in the plane of the electrode array, so that significant improvements in the signal-to-noise ratio compared with conventional imaging methods are achieved.

Original languageBritish English
Pages (from-to)759-762
Number of pages4
JournalMeasurement Science and Technology
Volume10
Issue number8
DOIs
StatePublished - Aug 1999

Keywords

  • Biotechnology
  • Colloid chemistry
  • Dielectrophoresis
  • Evanescent field
  • Fluorescence
  • Laser excitation
  • Particle movement

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