Optical properties improvement of dysprosium doped tellurite glass via silver/titanium nanoparticles coembedment

In this study, some dysprosium ions (Dy3+)-doped zinc-magnesium tellurite glasses with the co-embedment of silver nanoparticles (ANPs) and titanium nanoparticles (TNPs) were prepared using the standard melt quenching method. The compositions of the glass series I and II were (69.5-x)TeO2-20ZnO-10MgO...

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Main Author:	Mohd. Saidi, Mohd. Syamsul Affendy
Format:	Thesis
Language:	English
Published:	2020
Subjects:	Q Science (General)
Online Access:	http://eprints.utm.my/102613/1/MohdSyamsulAffendyMohdSaidiPFS2020.pdf.pdf
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spelling	my-utm-ep.1026132023-09-09T01:55:44Z Optical properties improvement of dysprosium doped tellurite glass via silver/titanium nanoparticles coembedment 2020 Mohd. Saidi, Mohd. Syamsul Affendy Q Science (General) In this study, some dysprosium ions (Dy3+)-doped zinc-magnesium tellurite glasses with the co-embedment of silver nanoparticles (ANPs) and titanium nanoparticles (TNPs) were prepared using the standard melt quenching method. The compositions of the glass series I and II were (69.5-x)TeO2-20ZnO-10MgO-0.5Dy-(x)AgCl (0 = x = 1.0 mol%) and (69.3-y)TeO2-20ZnO-10MgO-0.5Dy-0.2AgCl–(y)TiO2 (0 = y = 0.6 mol%), respectively. As-quenched glass samples were thoroughly characterized using different analytical techniques. The improvement in the optical, physical and structural properties of these glasses due to the co-embedment of two types of nanoparticles was determined. The optimum glass sample from both series was chosen to determine the influence of ANPs/TNPs inclusion on the optical, physical and structural characteristics. The ultraviolet-visible-infrared (UV-Vis-NIR) optical spectral analyses of the glass series I revealed an improvement in the absorption properties due to the addition of ANPs, while the glass series II (with ANPs and TNPs) showed a decrease in the absorption. Both glass series displayed six absorption bands due to the electronic transition from the ground state to various excited states of Dy3+. The Judd-Ofelt intensity parameters, O? (?=2, 4, 6) of the glasses were evaluated from the measured absorption spectra. The X-ray diffraction patterns of the as-quenched samples verified their amorphous nature. The high resolution transmission electron microscope (HRTEM) images revealed the presence of individual ANPs, TNPs and combined ANPs/TNPs in the glass matrix. The energy dispersive X-ray (EDX) spectra and mapping of the prepared glasses exhibited their appropriate elemental compositions. The incorporation of the ANPs/TNPs into the glasses was found to enhance their Raman and Fourier transformed infrared (FTIR) spectral intensities. The up-conversion and downconversion photoluminescence spectra of both glass series showed three prominent emission bands at 482 nm (blue: 4F9/2 ? 6H15/2), 574 nm (yellow: 4F9/2 ? 6H13/2), and 664 nm (weak red: 4F9/2 ? 6H11/2). In addition, the values of O? displayed the trend of O2>O6>O4 for the glass containing 0.1 mol% of TNPs, while all other glasses showed the trend of O2>O4>O6. The obtained results suggested that the optical properties of the Dy3+-doped zinc-magnesium tellurite glasses can be improved via the co-embedment of ANPs/TNPs compared to one type of NPs embedment. It is asserted that the proposed glass system may be useful for the development of optoelectronic and solid-state devices needed for different applications. 2020 Thesis http://eprints.utm.my/102613/ http://eprints.utm.my/102613/1/MohdSyamsulAffendyMohdSaidiPFS2020.pdf.pdf application/pdf en public http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:145983 phd doctoral Universiti Teknologi Malaysia Faculty of Science
institution	Universiti Teknologi Malaysia
collection	UTM Institutional Repository
language	English
topic	Q Science (General)
spellingShingle	Q Science (General) Mohd. Saidi, Mohd. Syamsul Affendy Optical properties improvement of dysprosium doped tellurite glass via silver/titanium nanoparticles coembedment
description	In this study, some dysprosium ions (Dy3+)-doped zinc-magnesium tellurite glasses with the co-embedment of silver nanoparticles (ANPs) and titanium nanoparticles (TNPs) were prepared using the standard melt quenching method. The compositions of the glass series I and II were (69.5-x)TeO2-20ZnO-10MgO-0.5Dy-(x)AgCl (0 = x = 1.0 mol%) and (69.3-y)TeO2-20ZnO-10MgO-0.5Dy-0.2AgCl–(y)TiO2 (0 = y = 0.6 mol%), respectively. As-quenched glass samples were thoroughly characterized using different analytical techniques. The improvement in the optical, physical and structural properties of these glasses due to the co-embedment of two types of nanoparticles was determined. The optimum glass sample from both series was chosen to determine the influence of ANPs/TNPs inclusion on the optical, physical and structural characteristics. The ultraviolet-visible-infrared (UV-Vis-NIR) optical spectral analyses of the glass series I revealed an improvement in the absorption properties due to the addition of ANPs, while the glass series II (with ANPs and TNPs) showed a decrease in the absorption. Both glass series displayed six absorption bands due to the electronic transition from the ground state to various excited states of Dy3+. The Judd-Ofelt intensity parameters, O? (?=2, 4, 6) of the glasses were evaluated from the measured absorption spectra. The X-ray diffraction patterns of the as-quenched samples verified their amorphous nature. The high resolution transmission electron microscope (HRTEM) images revealed the presence of individual ANPs, TNPs and combined ANPs/TNPs in the glass matrix. The energy dispersive X-ray (EDX) spectra and mapping of the prepared glasses exhibited their appropriate elemental compositions. The incorporation of the ANPs/TNPs into the glasses was found to enhance their Raman and Fourier transformed infrared (FTIR) spectral intensities. The up-conversion and downconversion photoluminescence spectra of both glass series showed three prominent emission bands at 482 nm (blue: 4F9/2 ? 6H15/2), 574 nm (yellow: 4F9/2 ? 6H13/2), and 664 nm (weak red: 4F9/2 ? 6H11/2). In addition, the values of O? displayed the trend of O2>O6>O4 for the glass containing 0.1 mol% of TNPs, while all other glasses showed the trend of O2>O4>O6. The obtained results suggested that the optical properties of the Dy3+-doped zinc-magnesium tellurite glasses can be improved via the co-embedment of ANPs/TNPs compared to one type of NPs embedment. It is asserted that the proposed glass system may be useful for the development of optoelectronic and solid-state devices needed for different applications.
format	Thesis
qualification_name	Doctor of Philosophy (PhD.)
qualification_level	Doctorate
author	Mohd. Saidi, Mohd. Syamsul Affendy
author_facet	Mohd. Saidi, Mohd. Syamsul Affendy
author_sort	Mohd. Saidi, Mohd. Syamsul Affendy
title	Optical properties improvement of dysprosium doped tellurite glass via silver/titanium nanoparticles coembedment
title_short	Optical properties improvement of dysprosium doped tellurite glass via silver/titanium nanoparticles coembedment
title_full	Optical properties improvement of dysprosium doped tellurite glass via silver/titanium nanoparticles coembedment
title_fullStr	Optical properties improvement of dysprosium doped tellurite glass via silver/titanium nanoparticles coembedment
title_full_unstemmed	Optical properties improvement of dysprosium doped tellurite glass via silver/titanium nanoparticles coembedment
title_sort	optical properties improvement of dysprosium doped tellurite glass via silver/titanium nanoparticles coembedment
granting_institution	Universiti Teknologi Malaysia
granting_department	Faculty of Science
publishDate	2020
url	http://eprints.utm.my/102613/1/MohdSyamsulAffendyMohdSaidiPFS2020.pdf.pdf
_version_	1783729191981678592

Optical properties improvement of dysprosium doped tellurite glass via silver/titanium nanoparticles coembedment

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