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Patterning microfluidic device wettability using flow confinement.

Adam R Abate1, Julian Thiele, Marie Weinhart

  • 1School of Engineering and Applied Sciences/Department of Physics, Harvard University, Cambridge, Massachusetts, USA.

Lab on a Chip
|May 22, 2010
PubMed
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Researchers developed a simple flow confinement method for precise surface patterning in microfluidic devices. This technique enables micron-scale resolution for creating complex double emulsions like W/O/W and O/W/O.

Area of Science:

  • Microfluidics
  • Surface Science
  • Materials Science

Background:

  • Microfluidic devices offer precise control over fluid behavior at small scales.
  • Patterning surface properties is crucial for advanced microfluidic applications.
  • Existing methods for surface patterning can be complex or lack high resolution.

Purpose of the Study:

  • To present a straightforward method for spatially patterning microfluidic device surfaces.
  • To achieve micron-scale resolution in surface property modification.
  • To demonstrate the application of patterned surfaces in creating double emulsions.

Main Methods:

  • Utilizing flow confinement within microfluidic channels to direct surface modification.
  • Spatially controlling the interaction of fluids with the device surface.

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  • Applying the patterned surfaces to generate water-in-oil-in-water (W/O/W) and oil-in-water-in-oil (O/W/O) double emulsions.

    • Main Results:

    • Successful spatial patterning of surface properties with micron-scale precision.
    • Demonstrated ability to create stable W/O/W and O/W/O double emulsions.
    • The flow confinement technique proved effective for controlled wettability patterning.

    Conclusions:

    • Flow confinement is a simple yet powerful technique for high-resolution surface patterning in microfluidics.
    • This method facilitates the fabrication of complex emulsion structures.
    • The developed technique has significant potential for advanced microfluidic applications and material fabrication.