Abstract
Polycrystalline yttria-stabilized tetragonal zirconia nanoparticles having a grain size around 50-80 nm were fabricated in aqueous poly (vinyl alcohol) (PVA) solution by mechanical attrition in a planetary mill, with the PVA used as a capping agent. The surface-modified nanoparticles displayed a significant near-band-edge photoluminescence with emission band centered at 428 nm due to the good surface passivation of the nanoparticles by the PVA molecules. An enhancement of the blue emission was observed when the nanoparticles were embedded in solid PVA matrix. Elevating the temperature of the zirconia nanoparticle solution from 337.5 to 357.5 K lead to temperature quenching of the luminescence due to the decrease of emissive centers caused by desorption of PVA from the nanoparticle surface.
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