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Regioselectively Ordered Silica Nanotubes by Molecular Templating

Authors

  • C. Zollfrank,

    1. Department of Materials Science and Engineering, Institute of Glass and Ceramics, Friedrich-Alexander University of Erlangen–Nuremberg, Martensstraße 5, 91058 Erlangen (Germany)
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  • H. Scheel,

    1. Department of Materials Science and Engineering, Institute of Glass and Ceramics, Friedrich-Alexander University of Erlangen–Nuremberg, Martensstraße 5, 91058 Erlangen (Germany)
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  • P. Greil

    1. Department of Materials Science and Engineering, Institute of Glass and Ceramics, Friedrich-Alexander University of Erlangen–Nuremberg, Martensstraße 5, 91058 Erlangen (Germany)
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  • The authors thank Prof. W. Bauer (Organic Chemistry, University of Erlangen-Nuremberg) for the NMR measurements. Financial support of the German Science Foundation (DFG) within the frame of the Priority Programme SPP 1165: “Nanowires and nanotubes” is gratefully acknowledged. The authors kindly acknowledge the Central Facility for High-Resolution Electron Microscopy of the University of Erlangen–Nuremberg for the use of their electron microscopes. Supporting Information is available online from Wiley InterScience or from the author.

Abstract

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Regioselectively ordered silica nanotubes are formed on molecular polysaccharide derivatives under mild conditions by sol–gel processing using biomimetic principles. The cellulose molecules serve as a rigid backbone, whilst structure-directing oligopropylamino residues are introduced to mimic the functional groups responsible for silica formation by diatoms (see figure). The obtained silica nanotubes exhibit a dual microstructure, consisting of an ordered near-core region and an amorphous mantle.

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