Som, Tirtha and Karmakar, Basudeb (2011) Synthesis and enhanced photoluminescence in novel Au(core)Au-Ag(shell) nanoparticles embedded Nd(3+)-doped antimony oxide glass hybrid nanocomposites. Journal of Quantitative Spectroscopy & Radiative Transfer, 112 (15). pp. 2469-2479. ISSN 0022-4073

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Au(core)Au-Ag(shell) nanoparticles and Nd(3+) ions co-doped in a novel antimony(III) oxide based dielectric (glass) matrix were synthesized for the first time, by a new very simple single-step methodology involving selective thermo-chemical reduction without employing any external reducing agent. They were characterized by the evolution of UV-vis-NIR absorption and photoluminescence spectra, XRD patterns, TEM and SAED images. XRD and SAED indicate the building of core-shell nanoparticles through the formation of (1 1 1) and (2 0 0) planes whereas TEM advocates the generation of spherical and spheroidal particles of 22-107 nm sizes with various core morphologies. Photoluminescence upconversion exhibits two major emission bands of Nd(3+) ions at 540 (green) and 649 (deep-red) nm which undergo about 5-fold intensity enhancement by the nanoparticles. Such enhancement is attributed to the local field effect induced by plasmonic Au-Ag nanoparticles to Nd(3+) ions. These nanocomposites are promising for many nanophotonics applications. (C) 2011 Elsevier Ltd. All rights reserved.

Item Type: Article
Uncontrolled Keywords: Metal-glass nanocomposites; Antimony oxide glasses; Neodymium; Core-shell morphology; Ag-Ag nanoparticles; Metal enhanced photoluminescence
Subjects: Glass
Depositing User: Bidhan Chaudhuri
Date Deposited: 25 Jan 2012 06:35
Last Modified: 29 Mar 2016 07:04

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