Fabrication of superhydrophobic surfaces from binary colloidal assembly.
In this work, superhydrophobic surfaces were derived from binary colloidal assemblies. CaCO(3)-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 CaCO(3)-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.
Zhang
Gang
G
Max Planck Institute of Colloids and Interfaces, D-14424, Potsdam, Germany.
Wang
Dayang
D
Gu
Zhong-Ze
ZZ
Möhwald
Helmuth
H