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Biomimetic Synthesis of Silica with Chitosan-Mediated Morphology

Authors

  • Boxun Leng,

    1. Key Laboratory of Molecular Engineering of Polymers of Ministry of Education Advanced Materials Laboratory Department of Macromolecular Science, Fudan University Shanghai 200433 (P. R. China)
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  • Xin Chen,

    1. Key Laboratory of Molecular Engineering of Polymers of Ministry of Education Advanced Materials Laboratory Department of Macromolecular Science, Fudan University Shanghai 200433 (P. R. China)
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  • Zhengzhong Shao,

    Corresponding author
    1. Key Laboratory of Molecular Engineering of Polymers of Ministry of Education Advanced Materials Laboratory Department of Macromolecular Science, Fudan University Shanghai 200433 (P. R. China)
    • Key Laboratory of Molecular Engineering of Polymers of Ministry of Education Advanced Materials Laboratory Department of Macromolecular Science, Fudan University Shanghai 200433 (P.R. China). Fax: (+86) 21-65640293
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  • Weihua Ming

    1. Laboratory of Materials and Interface Chemistry Eindhoven University of Technology P.O. Box 513, 5600 MB Eindhoven (The Netherlands) and Nanostructured Polymers Research Center Materials Science Program, University of New Hampshire Durham, NH 03824 (USA)
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  • This work was supported by the National Natural Science Foundation of China (NSFC 20525414), as well as the Programme for New Century Excellent Talents in University of China (NCET) and the Programme for Changjiang Scholars and Innovative Research Team in Fudan University. The authors further thank Dr. C. Dicko (University of Oxford) for his critical reading and valuable suggestions during the preparation of the manuscript.

Abstract

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Spherical, tabular, unique carambola-like shaped silica particles (see figure) are produced by the mediation of chitosan, a natural polyelectrolyte with abundant hydroxyl and amino groups. The silica morphology depends on the incubation time of the chitosan solution with phosphate ions before silicification. A sheet of the carambola-like silica made in this way has a granular surface, which inspires an “assembly–aggregation–silicification” model.

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