Rapid Synthesis of Monodisperse Polystyrene Microspheres and Self-Assembly of Colloidal Crystals on Mica |
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Authors: | Ya Yan |
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Affiliation: | 1. Faculty of Pharmacy, Dali University , Yunnan, P. R. China;2. Department of Chemistry , East China Normal University , Shanghai, P. R. China |
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Abstract: | Polystyrene (PS) colloidal particles were prepared in aqueous solution by a quick emulsifier-free emulsion polymerization (EFEP) method. The scanning electron microscopy (SEM) images indicate that the as-synthesized particles have good sphericity and uniform size (dispersion coefficient Cv is less than 5%). The monodisperse PS microspheres with different diameter were obtained easily by varying the monomer concentration. The atomic force microscopy (AFM) images show that the PS microspheres were self-assembled into three-dimensional ordered structure on micas by dropping-casting method. The self-assembly method is simple and quick. Based on the experimental results, a possible self-assembly mechanism was proposed. |
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Keywords: | Colloidal crystals emulsifier-free emulsion polymerization mica polystyrene self-assembly uniform colloidal particles |
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