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Updated: Jun 10, 2026

A Microfluidic Technique to Probe Cell Deformability
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A method for reducing pressure-induced deformation in silicone microfluidics.

David W Inglis1

  • 1Department of Physics, Macquarie University, North Ryde, New South Wales 2109, Australia.

Biomicrofluidics
|August 11, 2010
PubMed
Summary

Poly(dimethylsiloxane) (PDMS) is useful for microfluidics but deforms easily. A simple method using glass substrates significantly reduces shape changes in PDMS devices while maintaining its beneficial properties.

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Area of Science:

  • Materials Science
  • Microfluidics Engineering

Background:

  • Poly(dimethylsiloxane) (PDMS) is a key material in microfluidics due to its excellent mold release properties.
  • Its high deformability aids in replicating intricate mold features like high aspect ratios and negative sidewalls.

Purpose of the Study:

  • To quantify the extent of shape changes in PDMS microfluidic devices under fluidic pressure.
  • To introduce a simple method to mitigate these shape changes without compromising PDMS's advantages.

Main Methods:

  • Investigated the deformability of PDMS in microfluidic applications.
  • Developed and tested a fabrication technique involving a thin PDMS layer sandwiched between rigid glass substrates.

Main Results:

  • PDMS devices exhibit significant shape distortion when subjected to fluid pressure.

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  • The glass-substrate method drastically reduces pressure-induced shape changes.
  • The modified PDMS devices retain their deformability for mold separation and gas permeability.

    • Conclusions:

    • The proposed method effectively addresses the challenge of PDMS deformability in microfluidics.
    • This technique offers a practical solution for creating more robust PDMS-based microfluidic devices.