Experimental evidence of luminescence quenching at long coupling distances in europium III doped core-shell gold silica nanoparticlesReportar como inadecuado




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Gold Bulletin

, Volume 46, Issue 4, pp 349–355

First Online: 15 October 2013

Abstract

Localized surface plasmons can modify linear optical responses of materials located in their vicinity. In particular, rare earth ions luminescence can be enhanced by gold nanoparticles. Luminescence exaltation is a complex phenomenon that depends on multiple parameters, a critical one being the coupling distance between the emitting species and the plasmonic core. An original multilayer nanostructure designed to precisely control the distance between the gold cores and the luminescent ions, and to study its effect on the luminescent properties is presented here. Homogeneous silica shells with controlled thicknesses adjustable from 2 to 50 nm and rare earth ion doping rates up to 2 × 10 Eu-cm of silica were deposited onto gold nanospheres. These original nanostructures are then incorporated into densified sol–gel silica composites with high-optical quality. Luminescence properties are studied for increasing gold–europium III distances. Strong luminescence quenching is evidenced for coupling distances up to 28 nm.

KeywordsGold nanoparticles Core-shell nanoparticles Luminescence exaltation Rare earth Silica coating Luminescence quenching Electronic supplementary materialThe online version of this article doi:10.1007-s13404-013-0112-y contains supplementary material, which is available to authorized users.

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Autor: Laure Bertry - Olivier Durupthy - Patrick Aschehoug - Bruno Viana - Corinne Chanéac

Fuente: https://link.springer.com/







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