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  • Title: Fabrication of binary colloidal crystals and non-close-packed structures by a sequential self-assembly method.
    Author: Zhou Z, Yan Q, Li Q, Zhao XS.
    Journal: Langmuir; 2007 Jan 30; 23(3):1473-7. PubMed ID: 17241075.
    Abstract:
    Binary colloidal films of polystyrene (PS) spheres and silica spheres were fabricated with a sequential growth method using differently sized colloidal particles. In particular, we demonstrate the structures formed by a silica monolayer growing on top of a PS monolayer and a silica multilayer growing on top of a PS monolayer. By removal of the bottom PS layers, non-close-packed hexagonal, pentagonal, and square silica arrays were obtained at the original silica/PS interface. The possible formation mechanism of the non-close-packed structure was discussed, which may be used to explain how 3D colloidal crystals grow on patterned substrates.
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