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Updated: May 20, 2026
10:38
Label-free Isolation and Enrichment of Cells Through Contactless Dielectrophoresis
Published on: September 3, 2013
Multilayer contactless dielectrophoresis: theoretical considerations.
Michael B Sano1, Alireza Salmanzadeh, Rafael V Davalos
1School of Biomedical Engineering and Sciences, Virginia Tech-Wake Forest University, Blacksburg, VA 24061, USA.
Electrophoresis
|July 19, 2012
Summary
Contactless dielectrophoresis (cDEP) multilayer devices enable particle manipulation with higher fluid throughput. Device performance is limited by barrier material breakdown voltage and high-voltage signal generation capabilities.
Area of Science:
- Biophysics
- Electrical Engineering
- Microfluidics
Background:
- Dielectrophoresis (DEP) manipulates particles using non-uniform electric fields.
- Contactless DEP (cDEP) utilizes fluid electrodes separated by an insulating membrane.
- Existing cDEP devices offer particle manipulation but can be limited in fluid throughput.
Purpose of the Study:
- Investigate the performance of novel multilayer cDEP devices.
- Develop and validate a numerical approximation for cDEP device simulation.
- Assess the potential for increased fluid throughput in cDEP systems.
Main Methods:
- Finite element software simulations of multilayer cDEP devices.
- Development and validation of a computationally efficient numerical approximation.
- Fabrication and testing of a prototype cDEP device for cell trapping.
Main Results:
- Multilayer cDEP devices achieve comparable electrical performance to existing designs.
- Proposed devices demonstrate potential for significantly increased fluid throughput.
- Identified breakdown voltage and signal generation as key performance limitations.
- Successfully trapped breast cancer cells (MDA-MB-231) at 1.0 mL/h flow rate.
Conclusions:
- Multilayer cDEP devices offer an effective platform for particle manipulation with enhanced fluid handling.
- Device optimization requires addressing material dielectric strength and high-frequency power supply capabilities.
- This technology holds promise for improved microfluidic cell sorting and analysis applications.
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