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On the Preparation and Testing of Fuel Cell Catalysts Using the Thin Film Rotating Disk Electrode Method
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A cell electro-rotation micro-device using polarized cells as electrodes.

Liang Huang1, Weihua He1, Wenhui Wang1

  • 1State Key Laboratory of Precision Measurement Technology and Instrument, Department of Precision Instrument, Tsinghua University, Beijing, P. R. China.

Electrophoresis
|October 24, 2018
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Summary

This study introduces a new microfluidic chip for cell rotation using only two electrodes. It simplifies cell manipulation by using polarized cells as electrodes, enabling controlled rotation of HeLa and HepaRG cells.

Keywords:
DielectrophoresisElectro-rotationPolarized cell

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Area of Science:

  • Biotechnology
  • Microfluidics
  • Cell Biology

Background:

  • Single cell manipulation is crucial in various scientific fields.
  • Conventional dielectrophoresis (DEP) for cell rotation typically requires at least three electrodes to generate rotating electric fields.
  • Existing methods often involve complex device structures and operational procedures.

Purpose of the Study:

  • To develop a novel microfluidic chip for single cell rotation.
  • To simplify the electro-rotational manipulation of cells using fewer electrodes.
  • To demonstrate a new mechanism for generating rotating electric fields for cell manipulation.

Main Methods:

  • Design and fabrication of a microfluidic chip with two parallel planar electrodes.
  • Integration of trenches above electrodes to attract and position cells.
  • Utilizing polarized cells as 'extra electrodes' with phase-shifted signals to create rotating electric fields.
  • Computational simulation to validate the electric field generation.
  • Experimental validation using HeLa and HepaRG cells.

Main Results:

  • The microfluidic chip successfully generated rotating electric fields using only two electrodes.
  • Simulations confirmed the device's ability to produce appropriate electric fields for cell rotation.
  • Experimental results demonstrated controlled electro-rotation of both HeLa and HepaRG cells.
  • The novel approach simplified the micro-device structure and operation.

Conclusions:

  • A novel, simplified microfluidic chip for single cell rotation has been developed.
  • The use of polarized cells as electrodes with a two-electrode system is effective for cell rotation.
  • This technology offers a less complex and more accessible method for cell manipulation, benefiting potential users.