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Continuous dielectrophoretic cell separation microfluidic device.

Youlan Li1, Colin Dalton, H John Crabtree

  • 1Biosystems Research and Applications Group, Department of Electrical and Computer Engineering, Schulich School of Engineering, University of Calgary, 2500 University Drive, N.W., Calgary, AB, CanadaT2N 1N4.

Lab on a Chip
|February 3, 2007
PubMed
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This study introduces a microfluidic device for continuous cell separation using dielectrophoresis (DEP). The prototype successfully fractionates and purifies biological cells, advancing lab-on-a-chip technology.

Area of Science:

  • Biotechnology
  • Microfluidics
  • Cell Separation

Background:

  • Continuous cell fractionation and purification are crucial for biological research and diagnostics.
  • Existing methods often lack efficiency and integration capabilities.

Purpose of the Study:

  • To develop and validate a prototype microfluidic device for continuous dielectrophoretic (DEP) fractionation and purification of biological cells.
  • To demonstrate the device's potential for integration into lab-on-a-chip systems.

Main Methods:

  • The device integrates injector, fractionation, and collection units.
  • Hydrodynamic focusing is used for sample stream control.
  • A non-uniform electric field (isomotive) is employed for dielectrophoretic separation.
  • Microfluidic behavior was simulated and experimentally verified using yeast cells.

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Main Results:

  • The prototype device successfully fractionated and purified yeast cells.
  • The injector region's microfluidic behavior was validated.
  • The study discusses fabrication and operational challenges.

Conclusions:

  • The developed microfluidic device represents a significant step towards integrated lab-on-a-chip systems for cell analysis.
  • The DEP-based approach offers a promising method for continuous biological sample processing.