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Simplified search suggestions : Azlina Yahya

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

Abstract

This study aimed to enhance the optical properties on neodymium oxide (Nd2O3) and erbium oxide (Er2O3) doped tellurite-based glass coated with graphene oxide (GO). The two series of tellurite glasses with chemical composition of {[(TeO2)0.7 (B2O3)0.3]0.7 (ZnO)0.3}1?y (Nd2O3)y and {[(TeO2)0.7 (B2O3)0.3]0.7 (ZnO)0.3}1?y (Er2O3)y with varying concentrations of Nd³+ and Er³+ ions from y=0.005, 0.01, 0.02, 0.03, 0.04, and 0.05 mol% were prepared and coated with GO using melt-quenching and spray coating methods. The physical, structural and optical properties of prepared glasses were characterized using densimeter, scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform infrared (FT-IR), Ellipsometer, and ultraviolet- visible (UV- Vis) spectrophotometer. The structural analysis determined by XRD pattern proved an amorphous structure for the glass samples. The obtained results through FT-IR analysis showed the formation of non-bridging oxygen.....

Thesis Published 2020 1288 hits Available

Structural, intensity parameters and luminescence analysis of rGO-/CNTs-Coated tellurite glass doped with erbium nanoparticles

Azlina Yahya

Abstract

This study aimed to improve the optical properties of reduced graphene oxide- and carbon nanotubes-coated tellurite glass doped with erbium oxide nanoparticles denoted as ZBTEr(NPs)-rGO and ZBTEr(NPs)-CNTs. Two sets of glass series were synthesized by melt-quenched technique with chemical composition of (0.47(1-y))TeO2+(0.2(1- y))B2O3+(0.29(1-y))+ZnO+Er2O3(y) wherein, y = 0.005, 0.01, 0.02, 0.03, 0.04, and 0.05 mol% Er2O3 nanoparticles. Tellurite-based glass was deposited with rGO and CNTs onto the glass surfaces by spray-coated technique. The physical, morphological, structural, and optical properties of ZBTEr(NPs)-rGO and ZBTEr(NPS)-CNTs glasses were characterized via densimeter, scanning electron microscopy (SEM), energy dispersive X-ray (EDX), transmission electron microscopy (TEM), X-ray diffraction (XRD), Fourier transforminfrared (FT-IR), micro-Raman spectroscopy, ultraviolet-visible (UV-Vis) spectrophotometer, and photoluminescence. SEM micrographs revealed morpholog.....

Thesis Published 2023 1990 hits Available

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