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Mesoporous silica with micrometer-scale designs

Authors

  • Hong Yang,

    1. Materials Chemistry Research Group, Lash Miller Chemical Laboratories, University of Toronto, 80 St. George Street, Toronto, Ontario, M5S 3H6 (Canada)
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  • Dr. Neil Coombs,

    1. Imagetek Analytical Imaging, 32 Manning Avenue, Toronto, Ontario, M6J 2K4 (Canada)
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  • Geoffrey A. Ozin

    Corresponding author
    1. Materials Chemistry Research Group, Lash Miller Chemical Laboratories, University of Toronto, 80 St. George Street, Toronto, Ontario, M5S 3H6 (Canada)
    • Materials Chemistry Research Group, Lash Miller Chemical Laboratories, University of Toronto, 80 St. George Street, Toronto, Ontario, M5S 3H6 (Canada)
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  • Financial support from Mobil Technology Company is deeply appreciated. HY is grateful for an Ontario Graduate Scholarship held during the period of this work. Special thanks go to Professor George M. Whitesides and his co-workers Ms. Xiaomei Zhao and Dr. Younan Xia for teaching HY the microcontact printing technique and for providing PDMS stamps. HY also thanks F. Neud for giving him free access to the field emission SEM. We are grateful to Susan Mamiche-Afara for preparing the gold substrates.

Abstract

A “three-way-templating” strategy is proposed for the growth of patterned, mesoporous silica on a gold-covered mica substrate. A model is suggested, as shown in the Figure, involving (from bottom to top) the co-assembly of alkanethiol-decorated gold surfaces, alkanethiol-surfactant hetero-bilayers, and surfactant-silicate assemblies.

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