Journal
LANGMUIR
Volume 21, Issue 20, Pages 9143-9148Publisher
AMER CHEMICAL SOC
DOI: 10.1021/la0511945
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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.
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