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Volume 191, 2016
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Templated growth of gold satellites on dimpled silica cores

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Abstract

We synthesize robust clusters of gold satellites positioned with tetrahedral symmetry on the surface of a patchy silica core by adsorption and growth of gold on the patches. First we conduct emulsion polymerization of styrene in the presence of 52 nm silica seeds whose surface has been modified with methacryloxymethyltriethoxysilane (MMS). We derive four-dimple particles from the resulting silica/polystyrene tetrapods. Polystyrene chains are covalently bound to the silica surface within the dimples due to the MMS grafts and they may be thiolated to induce adsorption of 12 nm gold particles. Using chloroauric acid, ascorbic acid and sodium citrate at room temperature, we grow gold from these 12 nm seeds without detachment from or deformation of the dimpled silica surface. We obtain gold satellites of tunable diameter up to 140 nm.

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Publication details

The article was received on 23 Feb 2016, accepted on 29 Feb 2016 and first published on 14 Jul 2016


Article type: Paper
DOI: 10.1039/C6FD00022C
Author version available: Download Author version (PDF)
Citation: Faraday Discuss., 2016,191, 105-116
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    Templated growth of gold satellites on dimpled silica cores

    C. Chomette, E. Duguet, S. Mornet, E. Yammine, V. N. Manoharan, N. B. Schade, C. Hubert, S. Ravaine, A. Perro and M. Tréguer-Delapierre, Faraday Discuss., 2016, 191, 105
    DOI: 10.1039/C6FD00022C

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