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Bidirectional and Stepwise Rotation of Cells and Particles Using Induced Charge Electroosmosis Vortexes.

Shaoxi Wang1, Zhexin Zhang1,2,3, Xun Ma1

  • 1School of Microelectronics, Northwestern Polytechnical University, Xi'an 710072, China.

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|March 27, 2024
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Summary
This summary is machine-generated.

This study introduces a new chip-based method for cell rotation using induced charged electroosmosis (ICEO). This technique offers precise, controllable, and versatile cell manipulation for various biological applications.

Keywords:
controlled rotationdielectrophoresisinduced charge electroosmosismicrofluidics

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Area of Science:

  • Biophysics
  • Microfluidics
  • Cellular Engineering

Background:

  • Cell rotation is crucial for bioimaging, biophysical analysis, and microsurgery.
  • Existing cell manipulation techniques often involve complex fabrication processes.

Purpose of the Study:

  • To develop a simplified, chip-based method for precise cell rotation.
  • To utilize induced charged electroosmosis (ICEO) for controlled cellular manipulation.

Main Methods:

  • A chip manipulation method based on induced charged electroosmosis (ICEO) under an AC electric field.
  • Formation of ICEO flow microvortexes for cell trapping and rotation.
  • Investigation of ICEO and dielectrophoresis (DEP) interactions.
  • Utilizing gate voltage for asymmetric ICEO microvortexes to alter rotation direction.
  • Employing pulsed signals for stepwise cell rotation.

Main Results:

  • Demonstrated precise and controllable rotation of yeast cells and K562 cells.
  • Successfully altered cell rotation direction by adjusting cell position and applying gate voltage.
  • Achieved flexible, stepwise cell rotation using pulsed electrical signals.

Conclusions:

  • The ICEO-based method provides an easy-to-use, biocompatible, and low-cost technique for cell rotation.
  • This method is independent of the optical, magnetic, or acoustic properties of the cells.
  • Offers a versatile platform for advanced cell manipulation in biological research.