Insulator-based dielectrophoresis (iDEP) is a powerful tool for separating and characterizing particles, yet it is limited by a lack of quantitative characterizations. Here, this limitation is addressed by employing a method capable of quantifying the DEP mobility of particles. Using streak-based velocimetry the particle properties are deduced from their motion in a microfluidic channel with a constant electric field gradient. From this approach, the DEP mobility of 1μm polystyrene particles was found to be -2±0.410-8cm4/(V2s). In the future, such quantitative treatment will allow for the elucidation of unique insights and rational design of devices.

Original languageEnglish (US)
Pages (from-to)2292-2297
Number of pages6
Issue number17
StatePublished - Sep 2011


  • Dielectrophoresis
  • Dielectrophoretic mobility
  • Velocimetry

ASJC Scopus subject areas

  • Analytical Chemistry
  • Biochemistry
  • Clinical Biochemistry


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