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A Microfluidic-based Hydrodynamic Trap for Single Particles
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A microfluidic bubble trap and oscillator.

Janick D Stucki1, Olivier T Guenat2

  • 1Lung Regeneration Technologies, ARTORG Center for Biomedical Engineering Research, University of Bern, Switzerland. olivier.guenat@artorg.unibe.ch and Graduate School for Cellular and Biomedical Sciences, University of Bern, Switzerland.

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|October 27, 2015
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Summary

A novel bubble trap for microfluidic systems effectively captures air bubbles using surface tension and fluid dynamics. This simple design, made of tubes, also quantifies bubble oscillations for potential fluidic oscillator applications.

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Area of Science:

  • Fluid Dynamics
  • Microfluidics
  • Surface Science

Background:

  • Air bubbles entering microfluidic systems can disrupt experiments and compromise results.
  • Existing methods for bubble removal can be complex or inefficient.

Purpose of the Study:

  • To present a new, simple, and effective approach for trapping air bubbles in microfluidic devices.
  • To investigate the behavior and oscillations of trapped air bubbles.

Main Methods:

  • A bubble trap design utilizing the interaction of surface tension and hydrodynamic forces.
  • Fabrication using readily available tubes of varying sizes.
  • Theoretical modeling to explain the trapping mechanism.
  • Quantification of natural bubble oscillations.

Main Results:

  • The bubble trap successfully prevents air bubbles from entering microfluidic systems.
  • A theoretical model accurately describes the bubble trapping phenomenon.
  • Natural oscillations of trapped bubbles were characterized by displacement and frequency.

Conclusions:

  • The presented bubble trap offers a simple, integrable solution for bubble management in microfluidics.
  • Quantified bubble oscillations present opportunities for developing novel fluidic oscillators.