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Estimation of silver nanoparticles size in SiO2 sol-gel layers by use of UV-VIS spectroscopy

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Author(s): Marek Novotný | Josef Matoušek

Journal: Ceramics-Silikáty
ISSN 0862-5468

Volume: 55;
Issue: 4;
Start page: 326;
Date: 2011;
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Keywords: Sol-gel | Layers | Silver | Nanoparticles | Silica | Glass

ABSTRACT
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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