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Metamorphic Superomniphobic Surfaces.

Wei Wang1, Joshua Salazar2, Hamed Vahabi1

  • 1Department of Mechanical Engineering, Colorado State University, Fort Collins, CO, 80523, USA.

Advanced Materials (Deerfield Beach, Fla.)
|May 10, 2017
PubMed
Summary

Metamorphic superomniphobic (MorphS) surfaces combine extreme liquid repellency with shape memory effects. These surfaces demonstrate reversible wetting transitions triggered by heat, enabling novel applications.

Keywords:
shape memory polymerssuperomniphobic surfaceswetting transition

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Area of Science:

  • Materials Science
  • Surface Chemistry
  • Nanotechnology

Background:

  • Superomniphobic surfaces exhibit exceptional repellency to nearly all liquids.
  • Shape memory materials can alter their morphology in response to external stimuli like heat.

Purpose of the Study:

  • To develop metamorphic superomniphobic (MorphS) surfaces by integrating superomniphobicity with the shape memory effect.
  • To demonstrate and elucidate the physics behind distinct wetting transitions on MorphS surfaces.

Main Methods:

  • Fabrication of MorphS surfaces combining superomniphobicity and shape memory properties.
  • Investigation of liquid wetting transitions on MorphS surfaces under thermal stimuli.
  • Analysis of surface morphology transformations driving wetting behavior.

Main Results:

  • MorphS surfaces were successfully developed, exhibiting tunable morphology.
  • Distinct wetting transitions were observed for liquids with varying surface tensions.
  • Wetting transitions were solely attributed to reversible changes in surface texture morphology.

Conclusions:

  • MorphS surfaces offer a robust platform for controlled, reversible wetting transitions.
  • The developed surfaces have potential applications in rewritable liquid patterns, drug delivery, lab-on-a-chip devices, and biosensors.