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PTFE–PMMA core–shell colloidal particles as building blocks for self-assembled opals: synthesis, properties and optical response

Authors

  • Diego Antonioli,

    1. Dipartimento di Scienze dell'Ambiente e della Vita, Via G. Bellini 25 g, Università del Piemonte Orientale ‘A. Avogadro’, INSTM, UdR Alessandria, 15100 Alessandria, Italy
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  • Simone Deregibus,

    1. Dipartimento di Scienze dell'Ambiente e della Vita, Via G. Bellini 25 g, Università del Piemonte Orientale ‘A. Avogadro’, INSTM, UdR Alessandria, 15100 Alessandria, Italy
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  • Guido Panzarasa,

    1. Dipartimento di Scienze dell'Ambiente e della Vita, Via G. Bellini 25 g, Università del Piemonte Orientale ‘A. Avogadro’, INSTM, UdR Alessandria, 15100 Alessandria, Italy
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  • Katia Sparnacci,

    1. Dipartimento di Scienze dell'Ambiente e della Vita, Via G. Bellini 25 g, Università del Piemonte Orientale ‘A. Avogadro’, INSTM, UdR Alessandria, 15100 Alessandria, Italy
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  • Michele Laus,

    Corresponding author
    1. Dipartimento di Scienze dell'Ambiente e della Vita, Via G. Bellini 25 g, Università del Piemonte Orientale ‘A. Avogadro’, INSTM, UdR Alessandria, 15100 Alessandria, Italy
    • Dipartimento di Scienze dell'Ambiente e della Vita, Viale T. Michel 11, Università del Piemonte Orientale ‘A. Avogadro’, 15121 Alessandria, Italy.
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  • Luca Berti,

    1. Dipartimento di Chimica e Chimica Industriale, Università degli Studi di Genova, via Dodecaneso 31, I-16146 Genova, Italy
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  • Luca Frezza,

    1. Dipartimento di Chimica e Chimica Industriale, Università degli Studi di Genova, via Dodecaneso 31, I-16146 Genova, Italy
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  • Matteo Gambini,

    1. Dipartimento di Chimica e Chimica Industriale, Università degli Studi di Genova, via Dodecaneso 31, I-16146 Genova, Italy
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  • Luca Boarino,

    1. NanoFacility Piemonte, Electromagnetism Division, Istituto Nazionale di Ricerca Metrologica, Strada delle Cacce 91, 10135 Torino, Italy
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  • Emanuele Enrico,

    1. NanoFacility Piemonte, Electromagnetism Division, Istituto Nazionale di Ricerca Metrologica, Strada delle Cacce 91, 10135 Torino, Italy
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  • Davide Comoretto

    Corresponding author
    1. Dipartimento di Chimica e Chimica Industriale, Università degli Studi di Genova, via Dodecaneso 31, I-16146 Genova, Italy
    • Dipartimento di Chimica e Chimica Industriale, Università degli Studi di Genova, via Dodecaneso 31, I-16146 Genova, Italy.
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Abstract

A seeded surfactant-free methyl methacrylate emulsion polymerization is employed to prepare core–shell particles with predetermined size and narrow size distribution. The particle size is determined by the ratio between methyl methacrylate (MMA, shell) and polytetrafluoroethylene (PTFE, core). Monodisperse particles in the 100–350 nm range are obtained. These particles are used to grow colloidal photonic crystals (opals) of very high optical quality, thus indirectly demonstrating the excellent control of microbead size distribution achieved by this preparation technique. The optical properties of the opals are investigated by means of reflectance and polarized-angle-resolved transmittance spectroscopies. These data provide a rough determination of the effective refractive index of the system, which is favorably compared with values obtained by simple effective medium models. Copyright © 2012 Society of Chemical Industry

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