The effect of sintering on the optical properties of silica nanoparticles, a mean diameter of ~14 nm, are investigated by absorption and luminescence experiments. The sintering is induced by a thermal treatment of 1000 °C for 272 hours; after that the sample is transparent, and emits a bright luminescence under UV excitation. Time resolved photoluminescence spectra excited by a tunable laser source allows to evidence four bands around 2.0 eV, 2.4 eV, 2.7 eV and 3.4 eV, peculiar to defects induced by the sintering.
Vaccaro, L., Cangialosi, C., Spallino, L., Cannas, M., Gelardi, F.M., Boscaino, R. (2014). Luminescence properties induced by sintering of silica nanoparticles. ??????? it.cilea.surplus.oa.citation.tipologie.CitationProceedings.prensentedAt ??????? SiO2 Advanced Dielectrics and Related Devices X International Symposium, Cagliari.
Luminescence properties induced by sintering of silica nanoparticles
VACCARO, Lavinia;CANGIALOSI, Chiara;SPALLINO, Luisa;CANNAS, Marco;GELARDI, Franco Mario;BOSCAINO, Roberto
2014-01-01
Abstract
The effect of sintering on the optical properties of silica nanoparticles, a mean diameter of ~14 nm, are investigated by absorption and luminescence experiments. The sintering is induced by a thermal treatment of 1000 °C for 272 hours; after that the sample is transparent, and emits a bright luminescence under UV excitation. Time resolved photoluminescence spectra excited by a tunable laser source allows to evidence four bands around 2.0 eV, 2.4 eV, 2.7 eV and 3.4 eV, peculiar to defects induced by the sintering.
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