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    Crystallization of colloidal crystal on hydrogel surface

    Year: 2007

    Journal: Colloids and Surfaces A: Physicochemical and Engineering Aspects, Volume 292, Issue 1, 5 January 2007, Pages 63-68, 20111221

    Authors: Da Zheng, Haihua Chen, Shuai Zhang, Jing Wang, and Zhong-Ze Gu

    Organizations: State key laboratory of Bioelectronics, Southeast University, Nanjing, Jiangsu 210096, China, Laboratory of Solid State Microstructures, Nanjing University, Nanjing, Jiangsu 210093, China, College of Science, Dalian Fisheries University, Dalian, Liaoning116023, China

    A dip-coating method to fabricate wet and dry type of colloidal crystal films was developed. The wet type of colloidal crystal film was fabricated by lifting an agarose-hydrogel-coated substrate out of an aqueous suspension containing monodisperse polymer spheres and the dry type of colloidal crystal film was derived by following desiccation of the wet film. Monodisperse spheres formed ordered structures in the both type of the films, which contributed sharp reflection peaks. Brilliant colors were observed when the reflection peaks fell in the visible region. Formation mechanism of the colloidal crystal and their optical properties were discussed.