Fabrication of superhydrophobic surfaces from binary colloidal assembly

Gang Zhang, Dayang Wang, Zhong Ze Gu, Helmuth Mchwald

Research output: Contribution to journalArticlepeer-review

219 Scopus citations

Abstract

In this work, superhydrophobic surfaces were derived from binary colloidal assemblies. CaCO3-loaded hydrogel spheres and silica or polystyrene ones were consecutively dip-coated on silicon wafers. The former assemblies were recruited as templates for the latter self-assembly. Due to the hydrophilicity difference between silicon wafers and CaCO3-loaded hydrogel spheres, the region selective localization of silica or polystyrene spheres leads to irregular binary structures with a hierarchical roughness. The subsequent modification with low surface energy molecules yields a superhydrophobic surface. The heating treatment may largely enhance the mechanical stability of the resulting binary structures, which allows regeneration of the surface superhydrophobicity, providing a good durability in practice.

Original languageEnglish (US)
Pages (from-to)9143-9148
Number of pages6
JournalLangmuir
Volume21
Issue number20
DOIs
StatePublished - Sep 27 2005

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Spectroscopy
  • Electrochemistry

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