6533b860fe1ef96bd12c2b96

RESEARCH PRODUCT

Luminescence properties induced by sintering of silica nanoparticles

Lavinia VaccaroChiara CangialosiLuisa SpallinoMarco CannasFranco Mario GelardiRoberto Boscaino

subject

silica nanoparticles sintering time-resolved luminescence

description

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.

yearjournalcountryeditionlanguage
2014-01-01
http://hdl.handle.net/10447/96330