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Updated: Jul 12, 2025

Separating Beads and Cells in Multi-channel Microfluidic Devices Using Dielectrophoresis and Laminar Flow

Separating Beads and Cells in Multi-channel Microfluidic Devices Using Dielectrophoresis and Laminar Flow

Published on: February 4, 2011

A High-Throughput Microfluidic Cell Sorter Using a Three-Dimensional Coupled Hydrodynamic-Dielectrophoretic

Mohammad Aghaamoo^1,2, Braulio Cardenas-Benitez^1,2, Abraham P Lee^1,2,3

¹Department of Biomedical Engineering, University of California Irvine, Irvine, CA 92697, USA.

|October 28, 2023

Summary

This summary is machine-generated.

This study enhances dielectrophoresis (DEP) cell sorting by integrating a 3D hydrodynamic-DEP pre-focusing module, achieving a 10-fold increase in throughput for label-free cell separation.

Keywords:

dielectrophoresis high-throughput cell sorting hydrodynamic-dielectrophoretic 3D cell pre-focusing microfluidics theoretical and numerical modeling

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Last Updated: Jul 12, 2025

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Published on: November 23, 2015

Area of Science:

Biotechnology
Microfluidics
Cell Separation

Background:

Dielectrophoresis (DEP) enables label-free cell sorting based on dielectric properties.
Conventional DEP techniques are limited by low throughputs (<1 mL h^-1).

Purpose of the Study:

To increase the throughput of DEP cell sorting.
To investigate the principles of high-throughput cell separation using DEP.

Main Methods:

Integration of a 3D hydrodynamic-DEP cell pre-focusing module.
Development of a theoretical model for hydrodynamic and electrostatic forces at high flow rates.
Computational fluid dynamics modeling and particle tracking analysis.
Experimental validation using live/dead K562 cell sorting.

Main Results:

Achieved a 10-fold increase in cell sorting throughput (up to 10 mL h^-1).
Demonstrated high separation purity (90%) and cell recovery (85%).
Identified critical cell-to-electrode distance (≤10 µm) for efficient sorting at high flow rates.

Conclusions:

The 3D hydrodynamic-DEP pre-focusing module significantly enhances DEP sorting efficiency.
Optimized parameters enable high-throughput, high-purity cell separation with maintained cell viability.
This approach offers a promising solution for large-scale cell sorting applications.