Som, Tirtha and Karmakar, Basudeb (2010) Surface Plasmon Resonance and Enhanced Fluorescence Application of Single-step Synthesized Elliptical Nano Gold-embedded Antimony Glass Dichroic Nanocomposites. Plasmonics, 5 (2). pp. 149-159. ISSN 1557-1955

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Abstract

A novel series of elliptical gold (Au(0)) nanoparticles (18-40 nm) embedded antimony glass (K(2)O-B(2)O(3)-Sb(2)O(3)) dichroic nanocomposites have been synthesized by a single-step melt-quench in-situ thermochemical reduction technique. X-ray and selected area electron diffractions manifest growth of Au(0) nanoparticles along the (111) and (200) crystallographic planes. The transmission electron microscopic image reveals elliptical Au(0) nanoparticles having an aspect ratio varying in the range 1.2-2.1. The dichroic behavior of the nanocomposites arises due to elliptical shape of the Au(0) nanoparticles. These nanocomposites show strong surface plasmon resonance (SPR) band of Au nanoparticles in the range 610-681 nm and it exhibit red-shifts with increasing Au concentration. They, when co-doped with Sm(2)O(3) and excited at 949 nm, exhibit about sevenfold enhancement of the upconverted red emission transition of (4)G(5/2)->(6)H(9/2) at 636 nm due to local electric field enhancement effect of Au(0) nanoparticles induced by its SPR. These nanocomposites are the promising materials for laser, display, and various nanophotonic applications.

Item Type:	Article
Uncontrolled Keywords:	Surface plasmon resonance; Elliptical gold nanoparticles; Antimony glass nanocomposites; Metal-enhanced fluorescence
Subjects:	Glass
Divisions:	UNSPECIFIED
Depositing User:	Bidhan Chaudhuri
Date Deposited:	16 Feb 2012 10:24
Last Modified:	16 Feb 2012 10:24
URI:	http://cgcri.csircentral.net/id/eprint/921

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