Abstract
Silica sol-gel films were prepared by dipping, starting from an acid catalyzed solution of methyltriethoxysilane (MTES) and tetraethoxysilane (TEOS). Silver metal nanoparticles were produced in the silica layer by introducing in the sol-gel precursor solution AgNO3 or AgClO4·H2O. The silver ions were thermally reduced in air at 800°C, giving an intense yellow coating film. The silver metal particles were observed by transmission electron microscopy and X-ray diffraction. The diameter of the silver particles was found to be about 10 nm. Absorption measurements in the UV-Vis were used to evaluate the volume fraction of silver colloids embedded in the silica layer.
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Innocenzi, P., Kozuka, H. Methyltriethoxysilane-derived sol-gel coatings doped with silver metal particles. J Sol-Gel Sci Technol 3, 229–233 (1994). https://doi.org/10.1007/BF00486561
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DOI: https://doi.org/10.1007/BF00486561