Fabrication of Superhydrophobic Surfaces from Binary Colloidal Assembly

Fabrication of Superhydrophobic Surfaces from Binary Colloidal Assembly

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 hydrophilici...

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Veröffentlicht in:Langmuir 2005-09, Vol.21 (20), p.9143-9148
Hauptverfasser: Zhang, Gang, Wang, Dayang, Gu, Zhong-Ze, Möhwald, Helmuth
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Chemistry
Colloidal gels. Colloidal sols
Colloidal state and disperse state
Exact sciences and technology
General and physical chemistry
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container_issue 20
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container_title Langmuir
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creator Zhang, Gang
Wang, Dayang
Gu, Zhong-Ze
Möhwald, Helmuth
description 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.
doi_str_mv 10.1021/la0511945
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subjects Chemistry
Colloidal gels. Colloidal sols
Colloidal state and disperse state
Exact sciences and technology
General and physical chemistry
title Fabrication of Superhydrophobic Surfaces from Binary Colloidal Assembly
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