Luminescence of erbium doped tellurite glass containing silver nanoparticles

Enhancing the optical properties of rare-earth doped inorganic glasses by embedding metallic nanoparticles (NPs) of controlled sizes and examining the mechanism of enhancement are important and challenging. A series of Er3+ doped zinc tellurite glasses with and without silver NPs of molar compositio...

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Main Author:	Jamaludin, Mohd. Naqib Asyraf
Format:	Thesis
Language:	English
Published:	2014
Subjects:	QC Physics
Online Access:	http://eprints.utm.my/id/eprint/78771/1/MohdNaqibAsyrafMFS2014.pdf
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spelling	my-utm-ep.787712018-09-17T04:08:38Z Luminescence of erbium doped tellurite glass containing silver nanoparticles 2014-02 Jamaludin, Mohd. Naqib Asyraf QC Physics Enhancing the optical properties of rare-earth doped inorganic glasses by embedding metallic nanoparticles (NPs) of controlled sizes and examining the mechanism of enhancement are important and challenging. A series of Er3+ doped zinc tellurite glasses with and without silver NPs of molar composition (74.5- x)TeO2-25ZnO-0.5Er2O3-xAgCl with 0 = x = 1.0 mol % were prepared by meltquenching technique. They were characterized by X-ray diffraction, transmission electron microscopy, differential thermal analysis (DTA), and Fourier transform infrared (FTIR), ultraviolet-visible-near infrared and photoluminescence spectroscopy. The thermal, structural, and optical properties of these glasses were determined and analyzed. The XRD pattern confirms the amorphous nature of all samples. The high resolution TEM reveals the presence of silver NPs of average diameter 24 ± 2 nm with measured lattice constant of 2.09 Å and a Gaussian size distribution. The observed glass density ranges from 5.481 to 5.697 g cm-3 and the refractive index evaluated using Sellmeier’s equation varies between 2.16 to 2.27. Thermal parameters such as glass transition temperature (Tg), crystallization temperature (Tc), melting temperature (Tm) and thermal stability ?T (Tc-Tg) were determined from DTA analyses. A wide and stable glass formation range around 87ºC-105ºC was found. The structural properties measured by using FTIR show that as the AgCl content increases, the sharp infrared (IR) absorption peaks were consistently shifted from 675.13 cm-1 to 679.03 cm-1 which were assigned to the structural changes between the stretching vibration mode of TeO4 (trigonal bipyramids) and TeO3(trigonal pyramids). The absorption peaks around 1600 cm-1 and 3400 cm-1 are related to the stretching vibrations of the hydroxyl group participating in the strong metal and hydrogen bonding, respectively. The absorption spectra consist of eight absorption peaks centered at 1510, 975, 799, 655, 586, 523, 489 and 447 nm corresponding to transitions from ground state to 4I13/2, 4I11/2, 4I9/2, 4F9/2, 4S3/2, 2H11/2, 4F7/2, and 4F5/2 excited states, respectively. From PL spectra, excitation at 786 nm and 470 nm for up and down-conversion exhibits strong green and red emission comprised of three emissions band at 501, 548 and 634 nm. The significant enhancement in the luminescence with the increase of AgCl is ascribed to the local field enhancement induced by Ag0 surface plasmon resonance and the energy transfer from fluorescent Ag0?Er3+ ions. The improved optical and structural properties suggest that the studied glasses are potential candidates for nanophotonic devices. 2014-02 Thesis http://eprints.utm.my/id/eprint/78771/ http://eprints.utm.my/id/eprint/78771/1/MohdNaqibAsyrafMFS2014.pdf application/pdf en public http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:107011 masters Universiti Teknologi Malaysia, Faculty of Science Faculty of Science
institution	Universiti Teknologi Malaysia
collection	UTM Institutional Repository
language	English
topic	QC Physics
spellingShingle	QC Physics Jamaludin, Mohd. Naqib Asyraf Luminescence of erbium doped tellurite glass containing silver nanoparticles
description	Enhancing the optical properties of rare-earth doped inorganic glasses by embedding metallic nanoparticles (NPs) of controlled sizes and examining the mechanism of enhancement are important and challenging. A series of Er3+ doped zinc tellurite glasses with and without silver NPs of molar composition (74.5- x)TeO2-25ZnO-0.5Er2O3-xAgCl with 0 = x = 1.0 mol % were prepared by meltquenching technique. They were characterized by X-ray diffraction, transmission electron microscopy, differential thermal analysis (DTA), and Fourier transform infrared (FTIR), ultraviolet-visible-near infrared and photoluminescence spectroscopy. The thermal, structural, and optical properties of these glasses were determined and analyzed. The XRD pattern confirms the amorphous nature of all samples. The high resolution TEM reveals the presence of silver NPs of average diameter 24 ± 2 nm with measured lattice constant of 2.09 Å and a Gaussian size distribution. The observed glass density ranges from 5.481 to 5.697 g cm-3 and the refractive index evaluated using Sellmeier’s equation varies between 2.16 to 2.27. Thermal parameters such as glass transition temperature (Tg), crystallization temperature (Tc), melting temperature (Tm) and thermal stability ?T (Tc-Tg) were determined from DTA analyses. A wide and stable glass formation range around 87ºC-105ºC was found. The structural properties measured by using FTIR show that as the AgCl content increases, the sharp infrared (IR) absorption peaks were consistently shifted from 675.13 cm-1 to 679.03 cm-1 which were assigned to the structural changes between the stretching vibration mode of TeO4 (trigonal bipyramids) and TeO3(trigonal pyramids). The absorption peaks around 1600 cm-1 and 3400 cm-1 are related to the stretching vibrations of the hydroxyl group participating in the strong metal and hydrogen bonding, respectively. The absorption spectra consist of eight absorption peaks centered at 1510, 975, 799, 655, 586, 523, 489 and 447 nm corresponding to transitions from ground state to 4I13/2, 4I11/2, 4I9/2, 4F9/2, 4S3/2, 2H11/2, 4F7/2, and 4F5/2 excited states, respectively. From PL spectra, excitation at 786 nm and 470 nm for up and down-conversion exhibits strong green and red emission comprised of three emissions band at 501, 548 and 634 nm. The significant enhancement in the luminescence with the increase of AgCl is ascribed to the local field enhancement induced by Ag0 surface plasmon resonance and the energy transfer from fluorescent Ag0?Er3+ ions. The improved optical and structural properties suggest that the studied glasses are potential candidates for nanophotonic devices.
format	Thesis
qualification_level	Master's degree
author	Jamaludin, Mohd. Naqib Asyraf
author_facet	Jamaludin, Mohd. Naqib Asyraf
author_sort	Jamaludin, Mohd. Naqib Asyraf
title	Luminescence of erbium doped tellurite glass containing silver nanoparticles
title_short	Luminescence of erbium doped tellurite glass containing silver nanoparticles
title_full	Luminescence of erbium doped tellurite glass containing silver nanoparticles
title_fullStr	Luminescence of erbium doped tellurite glass containing silver nanoparticles
title_full_unstemmed	Luminescence of erbium doped tellurite glass containing silver nanoparticles
title_sort	luminescence of erbium doped tellurite glass containing silver nanoparticles
granting_institution	Universiti Teknologi Malaysia, Faculty of Science
granting_department	Faculty of Science
publishDate	2014
url	http://eprints.utm.my/id/eprint/78771/1/MohdNaqibAsyrafMFS2014.pdf
_version_	1747818067275022336

Luminescence of erbium doped tellurite glass containing silver nanoparticles

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