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Related Experiment Video

Updated: Jun 28, 2026

Rendering SiO2/Si Surfaces Omniphobic by Carving Gas-Entrapping Microtextures Comprising Reentrant and Doubly Reentrant Cavities or Pillars
08:02

Rendering SiO2/Si Surfaces Omniphobic by Carving Gas-Entrapping Microtextures Comprising Reentrant and Doubly Reentrant Cavities or Pillars

Published on: February 11, 2020

Robust omniphobic surfaces.

Anish Tuteja1, Wonjae Choi, Joseph M Mabry

  • 1Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.

Proceedings of the National Academy of Sciences of the United States of America
|November 13, 2008
PubMed
Summary
This summary is machine-generated.

Researchers developed re-entrant textured surfaces that create stable composite interfaces for liquids with low surface tension. These omniphobic surfaces repel various liquids, demonstrating broad applicability beyond water-repellent materials.

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Fabrication of Superhydrophobic Metal Surfaces for Anti-Icing Applications
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Preparation and High-temperature Anti-adhesion Behavior of a Slippery Surface on Stainless Steel

Published on: March 29, 2018

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Last Updated: Jun 28, 2026

Rendering SiO2/Si Surfaces Omniphobic by Carving Gas-Entrapping Microtextures Comprising Reentrant and Doubly Reentrant Cavities or Pillars
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Preparation and High-temperature Anti-adhesion Behavior of a Slippery Surface on Stainless Steel

Published on: March 29, 2018

Area of Science:

  • Materials Science
  • Surface Chemistry
  • Nanotechnology

Background:

  • Superhydrophobic surfaces achieve high water contact angles (>150°) due to trapped air pockets, forming stable solid-liquid-air interfaces.
  • Existing superhydrophobic surfaces struggle to maintain stable interfaces with low surface tension liquids (e.g., alkanes, alcohols) due to thermodynamic limitations.

Purpose of the Study:

  • To engineer surfaces capable of supporting stable composite interfaces with low surface tension liquids.
  • To develop predictive design parameters for liquid droplet behavior on textured surfaces.
  • To create versatile omniphobic surfaces applicable to a wide range of liquids.

Main Methods:

  • Development of surfaces with re-entrant textures to stabilize composite solid-liquid-air interfaces.
  • Proposal and application of four design parameters correlating surface properties, liquid properties, and interface stability.
  • Fabrication of electrospun fiber mats and microhoodoo surfaces to test design principles.

Main Results:

  • Re-entrant textured surfaces successfully supported metastable composite interfaces with liquids as low as pentane (15.7 mN/m).
  • The four proposed design parameters accurately predicted contact angles and interface robustness.
  • Both electrospun fiber mats and microhoodoo surfaces exhibited omniphobicity, repelling diverse liquids with contact angles >150° and low hysteresis.

Conclusions:

  • Re-entrant surface design overcomes thermodynamic limitations, enabling stable interfaces with low surface tension liquids.
  • The developed design parameters provide a framework for creating robust omniphobic materials.
  • The fabricated surfaces demonstrate potential for applications requiring liquid repellency across a broad spectrum of fluids.