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Issue 44, 2018
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Anionic block copolymer vesicles act as Trojan horses to enable efficient occlusion of guest species into host calcite crystals

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Abstract

We report a versatile ‘Trojan Horse’ strategy using highly anionic poly(methacrylic acid)–poly(benzyl methacrylate) vesicles to incorporate two types of model payloads, i.e. either silica nanoparticles or an organic dye (fluorescein), within CaCO3 (calcite). Uniform occlusion of silica-loaded vesicles was confirmed by scanning electron microscopy, while thermogravimetry studies indicated extents of vesicle occlusion of up to 9.4% by mass (∼33% by volume). Efficient dye-loaded vesicle occlusion produces highly fluorescent calcite crystals as judged by fluorescence microscopy. In control experiments, silica nanoparticles alone are barely occluded, while only very weakly fluorescent calcite crystals are obtained when using just the fluorescein dye. This new ‘Trojan Horse’ strategy opens up a generic route for the efficient occlusion of various nanoparticles and organic molecules within inorganic host crystals.

Graphical abstract: Anionic block copolymer vesicles act as Trojan horses to enable efficient occlusion of guest species into host calcite crystals

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Publication details

The article was received on 14 Aug 2018, accepted on 08 Sep 2018 and first published on 10 Sep 2018


Article type: Edge Article
DOI: 10.1039/C8SC03623C
Citation: Chem. Sci., 2018,9, 8396-8401
  • Open access: Creative Commons BY license
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    Anionic block copolymer vesicles act as Trojan horses to enable efficient occlusion of guest species into host calcite crystals

    Y. Ning, D. J. Whitaker, C. J. Mable, M. J. Derry, N. J. W. Penfold, A. N. Kulak, D. C. Green, F. C. Meldrum and S. P. Armes, Chem. Sci., 2018, 9, 8396
    DOI: 10.1039/C8SC03623C

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