Silver nanocluster formation in silica coatings by the sol-gel route

Authors

  • Dr. Lidia Armelao,

    Corresponding author
    1. Consiglio Nazionale delle Ricerche Centro Studio sulla Stabilita e Reattività dei Composti di Coordinazione Via Marzolo, 1,1-35131 Padova (Italy)
    • Consiglio Nazionale delle Ricerche Centro Studio sulla Stabilita e Reattività dei Composti di Coordinazione Via Marzolo, 1,1-35131 Padova (Italy)
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  • Dr. Renzo Bertoncello,

    1. Dipartimento di Chimica Inorganica, Metallorganica ed Analitica Università di Padova Via Loredan, 4,1-35131 Padova (Italy)
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  • Dr. Mattia De Dominicis

    1. Dipartimento di Chimica Inorganica, Metallorganica ed Analitica Università di Padova Via Loredan, 4,1-35131 Padova (Italy)
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Abstract

The sol-gel synthesis of silver-nanocluster-doped silica coatings is described, which leads to samples containing only silver cations. Subsequent thermal treatments cause these to evolve into metal silver particles with spherical shape, narrow size distribution, and homogeneous dispersion. It is shown that the size, distribution, and stability of the silver clusters can be controlled by the choice of precursor compounds and subsequent thermal treatments. A hypothesis is put forward to explain the cluster formation and observed heat-dependent color change.

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