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Silver nanoparticles enhanced luminescence of Eu3+-doped tellurite glass

Sahar, M Rahim and Ghoshal, Sib Krishna and Said Mahraz, Zahra Ashur and Dousti, Mohammad Reza and Amjad, Muhammad Junaid (2014) Silver nanoparticles enhanced luminescence of Eu3+-doped tellurite glass. Journal of Luminescence, 154 . pp. 316-321. ISSN 0022-2313

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Official URL: http://dx.doi.org/10.1016/j.jlumin.2014.05.009

Abstract

A series of silver nanoparticles (NPs) embedded zinc-tellurite glass is prepared by the melt-quench method. In order to nucleate and reduce the silver ions (Ag+) to silver NPs (Ag0) heat treatment with different time intervals above the glass transition temperature is carried out. The transmission electron microscopy (TEM), differential thermal analyses (DTA), UV-vis-NIR absorption spectroscopy and photoluminescence (PL) spectroscopy are used to study the annealing time dependent optical properties. The glass transition temperature (Tg) from DTA for an as prepared sample is 296 °C. TEM image displays the homogeneous distribution of silver NPs with average diameter ~8 to 27 nm. From UV-vis-NIR spectra, the observed localized surface plasmon resonance (LSPR) bands are found to be located within the range 487-501 nm for the samples with AgCl. Furthermore, under an excitation of 395 nm, four bands are observed at 585, 612, 650, 698 nm which corresponds to the 5D0-7F0;1;2;3;4 transitions of Eu3+ ions. Moreover, luminescence intensity of all the bands is increased due to the presence of silver nanostructures. The hypersensitive transition 5D0-7F2 of Eu 3+ is much more enhanced (∼ 1.9 times) mainly due to the local field effect of silver NPs.

Item Type:Article
Uncontrolled Keywords:glass, luminescence
Subjects:Q Science
Divisions:Science
ID Code:62574
Deposited By: Widya Wahid
Deposited On:18 Jun 2017 14:40
Last Modified:18 Jun 2017 14:40

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