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Related Concept Videos

Mechanism of Ciliary Motion01:05

Mechanism of Ciliary Motion

The ciliary structures were first seen in 1647 by Antonie Leeuwenhoek while observing the protozoans. In lower organisms, these appendages are responsible for cell movement, while in higher organisms, these appendages help in the movement of the extracellular fluids within the body cavities.
The cilia are made up of microtubules in a 9+2 arrangement, with nine microtubule doublet ring bundles, surrounding a pair of central singlet microtubule bundles. The doublet microtubule bundles are...

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Silicon Microchips for Manipulating Cell-cell Interaction
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Published on: August 30, 2007

Bio-mimetic silicone cilia for microfluidic manipulation.

Kieseok Oh1, Jae-Hyun Chung, Santosh Devasia

  • 1Department of Mechanical Engineering, University of Washington, Seattle, WA 98195, USA.

Lab on a Chip
|May 22, 2009
PubMed
Summary

Researchers developed a bio-mimetic microfluidic device using compliant cilia for bio-compatible fluid manipulation. This innovation overcomes manufacturing challenges to mimic biological cilia

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Area of Science:

  • Biomimetics
  • Microfluidics
  • Bio-compatible manipulation

Background:

  • Biological cilia exhibit high compliance and low beating frequencies (10-100 Hz), enabling efficient microfluidic manipulation.
  • Manufacturing bio-mimetic cilia faces challenges like collapse due to surface tension and difficulty in achieving low frequencies.

Purpose of the Study:

  • To develop a bio-mimetic microfluidic device that replicates the compliance and beating frequency of biological cilia.
  • To achieve bio-compatible manipulation of microfluids using artificial cilia.

Main Methods:

  • An underwater fabrication method was employed to create highly compliant cilia, minimizing surface energy and preventing collapse.
  • A piezo actuator was used to excite silicone cilia, inducing resonance in the aqueous environment.
  • Simulations and experimental validations were performed to analyze cilia behavior and microfluidic manipulation capabilities.

Main Results:

  • The developed underwater fabrication method successfully produced highly compliant cilia, mitigating collapse issues.
  • The bio-mimetic cilia, when actuated, resonated at frequencies within the biological cilia range (10-100 Hz).
  • The assembled cilia array demonstrated effective microfluidic manipulation through resonance.

Conclusions:

  • The study successfully demonstrates a novel bio-mimetic microfluidic device with compliant cilia.
  • The developed fabrication technique and actuation method enable the replication of biological cilia functions for bio-compatible applications.
  • This research paves the way for advanced microfluidic systems in biological and medical fields.