Dielectrophoretic mobility determination in DC insulator-based dielectrophoresis

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 ve...

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Bibliographic Details
Published in:Electrophoresis 2011-09, Vol.32 (17), p.2292-2297
Main Authors: Weiss, Noah G., Jones, Paul V., Mahanti, Prasun, Chen, Kang P., Taylor, Thomas J., Hayes, Mark A.
Format: Article
Language:English
Subjects:
Computer Simulation
Dielectrophoresis
Dielectrophoretic mobility
Electrophoresis - instrumentation
Electrophoresis - methods
Equipment Design
Linear Models
Microfluidic Analytical Techniques - instrumentation
Microfluidic Analytical Techniques - methods
Microspheres
Rheology
Velocimetry
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Summary: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 1 μm polystyrene particles was found to be −2±0.4 10−8 cm4/(V2 s). In the future, such quantitative treatment will allow for the elucidation of unique insights and rational design of devices.
ISSN:0173-0835
1522-2683
DOI:10.1002/elps.201100034