Ceramics-Silikáty 55, (4) 326 - 330 (2011) |
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ESTIMATION OF SILVER NANOPARTICLES SIZE IN SiO₂ SOL-GEL LAYERS BY USE OF UV-VIS SPECTROSCOPY
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Novotný Marek 1, Matoušek Josef 2
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1 AGC Flat Glass Europe, Jumet, Rue de l’Aurore 2, Belgium
2 Department of Glass and Ceramics, Institute of Chemical Technology Prague,
Prague 6, Technická 5, Czech Republic
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Keywords: Sol-gel, Layers, Silver, Nanoparticles, Silica, Glass
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Silica glass layers containing silver nanoparticles were prepared by the sol-gel method. The layers were deposited on a glass
substrate by the dip-coating method, dried and heat treated at various temperatures. The average silver particle size was
determined from absorption spectra according to Mie’s theory. A good correlation was found between the calculated values
and analysis of HRTEM images. A very narrow size distribution was obtained by this procedure. The average particle size
of silver particles fell between 1 and 2 nm for dried samples; in case of glasses treated at 500 and 550°C the size ranged
between 2 and 4 nm. |
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