Optical properties of neodymmium and erbium doped tellurite glass coated with graphene oxide

Optical properties of neodymmium and erbium doped tellurite glass coated with graphene oxide

<p>This study aimed to enhance the optical properties on neodymium oxide (Nd2O3) and</p><p>erbium oxide (Er2O3) doped tellurite-based glass coated with graphene oxide (GO). The two series of</p><p>tellurite glasses with chemical c...

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Main Author: Azlina Yahya
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Published: 2020
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Azlina Yahya
Optical properties of neodymmium and erbium doped tellurite glass coated with graphene oxide
description <p>This study aimed to enhance the optical properties on neodymium oxide (Nd2O3) and</p><p>erbium oxide (Er2O3) doped tellurite-based glass coated with graphene oxide (GO). The two series of</p><p>tellurite glasses with chemical composition of {[(TeO2)0.7 (B2O3)0.3]0.7 (ZnO)0.3}1?y (Nd2O3)y and</p><p>{[(TeO2)0.7 (B2O3)0.3]0.7 (ZnO)0.3}1?y (Er2O3)y with varying</p><p>concentrations of Nd+ and Er+ ions from y=0.005, 0.01, 0.02, 0.03, 0.04, and 0.05 mol% were</p><p>prepared and coated with GO using melt-quenching and spray coating methods. The physical,</p><p>structural and optical properties of prepared glasses were characterized using densimeter, scanning</p><p>electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform infrared (FT-IR),</p><p>Ellipsometer, and ultraviolet- visible (UV- Vis) spectrophotometer. The structural analysis</p><p>determined by XRD pattern proved an amorphous structure for the glass samples. The obtained results</p><p>through FT-IR analysis showed the formation of non-bridging oxygens (NBOs) in the glass network</p><p>system. The SEM images revealed the surface morphology of GO on the glass surface. The values of</p><p>the refractive index were escalated with the increasing concentration of neodymium from</p><p>2.301 to 2.332, and erbium from 2.275 to 2.299 with the existence of GO. This was due to the</p><p>presence of a high degree number of oxygen atoms consisted in GO structure. The values of optical</p><p>bandgap energy were enhanced with the increasing concentrations of neodymium from 3.315 to 3.381 eV</p><p>while for erbium from 3.392 to 3.495 eV. The increment of optical bandgap energy was due to the</p><p>high in GO optical absorptions. The electronic polarizability values of glass samples were enhanced</p><p>for neodymium from 8.815 to 8.887 while for erbium from 8.815 to 8.894 due to high surface</p><p>area and low particle density in GO. In conclusion, the synthesized GO is a good candidate for use</p><p>as a coating material on tellurite-based glass surfaces. This study may contribute to the</p><p>potential uses for high optical performance of fiber optics applications.</p><p></p>
format thesis
qualification_name
qualification_level Master's degree
author Azlina Yahya
author_facet Azlina Yahya
author_sort Azlina Yahya
title Optical properties of neodymmium and erbium doped tellurite glass coated with graphene oxide
title_short Optical properties of neodymmium and erbium doped tellurite glass coated with graphene oxide
title_full Optical properties of neodymmium and erbium doped tellurite glass coated with graphene oxide
title_fullStr Optical properties of neodymmium and erbium doped tellurite glass coated with graphene oxide
title_full_unstemmed Optical properties of neodymmium and erbium doped tellurite glass coated with graphene oxide
title_sort optical properties of neodymmium and erbium doped tellurite glass coated with graphene oxide
granting_institution Universiti Pendidikan Sultan Idris
granting_department Fakulti Sains dan Matematik
publishDate 2020
url https://ir.upsi.edu.my/detailsg.php?det=7232
_version_ 1747833367202627584
spelling oai:ir.upsi.edu.my:72322022-07-05 Optical properties of neodymmium and erbium doped tellurite glass coated with graphene oxide 2020 Azlina Yahya <p>This study aimed to enhance the optical properties on neodymium oxide (Nd2O3) and</p><p>erbium oxide (Er2O3) doped tellurite-based glass coated with graphene oxide (GO). The two series of</p><p>tellurite glasses with chemical composition of {[(TeO2)0.7 (B2O3)0.3]0.7 (ZnO)0.3}1?y (Nd2O3)y and</p><p>{[(TeO2)0.7 (B2O3)0.3]0.7 (ZnO)0.3}1?y (Er2O3)y with varying</p><p>concentrations of Nd+ and Er+ ions from y=0.005, 0.01, 0.02, 0.03, 0.04, and 0.05 mol% were</p><p>prepared and coated with GO using melt-quenching and spray coating methods. The physical,</p><p>structural and optical properties of prepared glasses were characterized using densimeter, scanning</p><p>electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform infrared (FT-IR),</p><p>Ellipsometer, and ultraviolet- visible (UV- Vis) spectrophotometer. The structural analysis</p><p>determined by XRD pattern proved an amorphous structure for the glass samples. The obtained results</p><p>through FT-IR analysis showed the formation of non-bridging oxygens (NBOs) in the glass network</p><p>system. The SEM images revealed the surface morphology of GO on the glass surface. The values of</p><p>the refractive index were escalated with the increasing concentration of neodymium from</p><p>2.301 to 2.332, and erbium from 2.275 to 2.299 with the existence of GO. This was due to the</p><p>presence of a high degree number of oxygen atoms consisted in GO structure. The values of optical</p><p>bandgap energy were enhanced with the increasing concentrations of neodymium from 3.315 to 3.381 eV</p><p>while for erbium from 3.392 to 3.495 eV. The increment of optical bandgap energy was due to the</p><p>high in GO optical absorptions. The electronic polarizability values of glass samples were enhanced</p><p>for neodymium from 8.815 to 8.887 while for erbium from 8.815 to 8.894 due to high surface</p><p>area and low particle density in GO. In conclusion, the synthesized GO is a good candidate for use</p><p>as a coating material on tellurite-based glass surfaces. This study may contribute to the</p><p>potential uses for high optical performance of fiber optics applications.</p><p></p> 2020 thesis https://ir.upsi.edu.my/detailsg.php?det=7232 https://ir.upsi.edu.my/detailsg.php?det=7232 text eng closedAccess Masters Universiti Pendidikan Sultan Idris Fakulti Sains dan Matematik <p>Abdel-Baki, M. & El-Diasty, F. (2007). Optical properties of oxide glasses containing transition</p><p>metals : Case of titanium- and chromium-containing glasses. Current Opinion in Solid State and</p><p>Materials Science, 10(56), 217229.</p><p></p><p>Abdul, H., Sidek, A., Chow, S. P., & Talib, Z. A. (2004). 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