Som, Tirtha and Karmakar, Basudeb (2009) Core-Shell Au-Ag Nanoparticles in Dielectric Nanocomposites with Plasmon-Enhanced Fluorescence: A New Paradigm in Antimony Glasses. Nano Research, 2 (8). pp. 607-616. ISSN 1998-0124

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Abstract

The nano era demands the synthesis of new nanostructured materials, if possible by simplified techniques, with remarkable properties and versatile applications. Here, we demonstrate a new single-step reproducible melt-quench methodology to fabricate core-shell bimetallic (Au(0)-Ag(0)) nanoparticles (28-89 nm) embedded glasses (dielectrics) by the use of a new reducing glass matrix, K(2)O-B(2)O(3)-Sb(2)O(3) (KBS) without applying any external reducing agent or multiple processing steps. The surface plasmon resonance (SPR) band of these nanocomposites embedded in KBS glass is tunable in the range 554-681 nm. More remarkably, taking advantage of the selective reduction capability of Sb(2)O(3), this single-step methodology is used to fabricate inter-metallic: rare-earth ions co-embedded (Au-Ag:Sm(3+)) dielectric (glass)-based-dnanocomposites and study the effect of enhanced local field on the red upconversion fluorescence of Sm(3+) ions at 636 nm. The enhancement is found to be about 2 folds. This single-step in-situ selective reduction approach can be used to fabricate a variety of hybrid-nanocomposite devices for laser based applications (see supplementary information).

Item Type:	Article
Uncontrolled Keywords:	Gold-silver nanostructures; core-shell morphology; surface plasmon resonance; antimony glass; metal-enhanced rare earth fluorescence
Subjects:	Glass
Divisions:	Glass
Depositing User:	Bidhan Chaudhuri
Date Deposited:	02 Mar 2012 07:41
Last Modified:	28 Mar 2018 09:30
URI:	http://cgcri.csircentral.net/id/eprint/1117

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