Bioinspired,Cysteamine‐Catalyzed Co‐Silicification of (1 H, 1 H, 2 H, 2 H‐Perfluorooctyl)triethoxysilane and Tetraethyl Orthosilicate: Formation of Superhydrophobic Surfaces |
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| Authors: | Ji Hun Park Ji Yup Kim Prof. Dr. Woo Kyung Cho Prof. Dr. Insung S. Choi |
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| Affiliation: | 1. Center for Cell‐Encapsulation Research and Molecular‐Level Interface Research Center, Department of Chemistry, KAIST, Daejeon 305‐701 (Korea), Fax: (+82)?42‐350‐2810;2. Department of Chemistry, Chungnam National University, Daejeon 305‐764 (Korea) |
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| Abstract: | Bioinspired silicification attracts a great deal of interest because of its physiologically relevant, mild conditions for hydrolysis and condensation of silica precursors, which makes the bioinspired approach superior to the conventional sol–gel process, particularly when dealing with biological entities. However, the morphological control of silica structures with incorporation of functional groups in the bioinspired silicilication has been unexplored. In this work, we co‐silicificated (1 H, 1 H, 2 H, 2 H‐perfluorooctyl)triethoxysilane and tetraethyl orthosilicate to investigate the morphological evolution of fluorinated silica structures in the cetyltrimethylammonium bromide‐mediated, cysteamine‐catalyzed silicification. The generated micrometer‐long worm‐like and spherical silica structures display superhydrophobicity after film formation. Interestingly, the measurement of dynamic water contact angles shows that the morphological difference leads to a different wetting state, either the self‐cleaning or the pinning state of the superhydrophobic surface. |
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| Keywords: | cysteamine fluorination glass sponge silicification superhydrophobicity |
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