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Related Experiment Video

Updated: May 4, 2026

Rendering SiO2/Si Surfaces Omniphobic by Carving Gas-Entrapping Microtextures Comprising Reentrant and Doubly Reentrant Cavities or Pillars
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Micro-and nanostructured silicon-based superomniphobic surfaces.

Thi Phuong Nhung Nguyen1, Rabah Boukherroub2, Vincent Thomy3

  • 1Institut de Recherche Interdisciplinaire (IRI), USR CNRS 3078, Université Lille1, Parc de la Haute Borne, 50 Avenue de Halley, 59658 Villeneuve d'Ascq, France; Institut d'Electronique, de Microélectronique et de Nanotechnologie (IEMN - UMR 8520), Cité Scientifique, Avenue Poincaré, BP 60069, 59652 Villeneuve d'Ascq, France; PetroVietnam University, 30/4 Street, Vung Tau City, Vietnam.

Journal of Colloid and Interface Science
|December 28, 2013
PubMed
Summary
This summary is machine-generated.

Researchers created advanced silicon surfaces that repel both water and oil, achieving superomniphobic properties. The best design featured dual-scale nanostructures, offering excellent liquid repellency and low contact angle hysteresis for various liquids.

Keywords:
Multi-scale roughnessOrganic coatingSilicon nanostructuresSuperoleophobicSurperhydrophobic

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Area of Science:

  • Materials Science
  • Surface Science
  • Nanotechnology

Background:

  • Superhydrophobic and superoleophobic surfaces are crucial for advanced material applications.
  • Controlling surface wettability is key to developing self-cleaning and anti-fouling materials.
  • Existing methods often struggle to achieve stable omniphobic properties across diverse liquids.

Purpose of the Study:

  • To fabricate and characterize silicon nanostructured surfaces with superomniphobic properties.
  • To investigate the effect of surface morphology on wettability and liquid repellency.
  • To identify optimal surface designs for achieving low contact angle hysteresis with various liquids.

Main Methods:

  • Fabrication of silicon surfaces with single and dual-scale nanostructures.
  • Chemical functionalization using perfluorodecyltrichlorosilane (PFTS).
  • Characterization using Scanning Electron Microscopy (SEM) and contact angle measurements.

Main Results:

  • All fabricated surfaces exhibited superhydrophobic (water CA > 150°) and superoleophobic (hexadecane CA ≈ 140°) characteristics.
  • Contact angle hysteresis varied significantly with liquid surface tension and surface morphology.
  • A dual-scale textured surface (micropillars with nanowires) demonstrated superior performance with high static contact angles and low hysteresis for all tested liquids.

Conclusions:

  • Silicon nanostructured surfaces can be engineered to achieve superomniphobicity.
  • Dual-scale texturation is highly effective in minimizing contact angle hysteresis for a wide range of liquids.
  • The developed surfaces show promise for applications requiring extreme liquid repellency.