Som, Tirtha and Karmakar, Basudeb (2011) One-step synthesis and properties of monolithic photoluminescent ruby colored cuprous oxide antimony oxide glass nanocomposites. Journal of Alloys and Compounds, 509 (15). pp. 4999-5007. ISSN 0925-8388

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Abstract

Cuprous oxide (Cu(2)O) antimony glass (K(2)O-B(2)O3-Sb(2)O(3)) monolithic nanocomposites having brilliant yellow to ruby red color have been synthesized by a single-step melt-quench technique involving in situ thermochemical reduction of Cu(2+) (CuO) by the reducing glass matrix without using any external reducing agent. The X-ray diffraction (XRD), infrared transmission and reflection spectra, and selected area electron diffraction analysis support the reduction of Cu(2+) to Cu(+) with the formation of Cu(2)O nanoclusters along with Cu(y)Sb(2-x)(O,OH)(6-7) (y <= 2, x <= 1) nanocrystalline phases while Cu(0) nanoclusters are formed at very high Cu concentration. The UV-vis spectra of the yellow and orange colored nanocomposites show size-controlled band gap shift of the semiconductor (Cu2O) nanocrystallites embedded in the glasses while the red nanocomposite exhibits surface plasmon resonance band at 529nm due to metallic Cu. Transmission electron microscopic image advocates the formation of nanocystallites (5-42 nm). Photoluminescence emission studies show broad red emission band around 626nm under various excitation wavelengths from 210 to 270 nm. (C) 2011 Elsevier B.V. All rights reserved.

Item Type:	Article
Uncontrolled Keywords:	Nanostructured materials; Optical materials; Optical properties; Luminescence
Subjects:	Glass
Divisions:	Glass
Depositing User:	Bidhan Chaudhuri
Date Deposited:	20 Jan 2012 04:47
Last Modified:	25 Feb 2013 08:40
URI:	http://cgcri.csircentral.net/id/eprint/419

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