Characterization of aluminium doped zinc oxide nanostructures synthesized by thermal evaporation method

This study focuses on the synthesis and characterization of undoped and aluminium (Al) doped ZnO nanostructures for examples nanoflowers, nanorods, nanowires and nanopetals grown by thermal evaporation method. Samples were grown on silicon (100) substrate. The silicon substrate was placed at 17 cm a...

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Main Author:	Salihin, Norafizah
Format:	Thesis
Language:	English
Published:	2019
Subjects:	QC Physics
Online Access:	http://eprints.utm.my/id/eprint/81536/1/NorafizahSalihinMFS2019.pdf
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spelling	my-utm-ep.815362019-08-23T05:21:26Z Characterization of aluminium doped zinc oxide nanostructures synthesized by thermal evaporation method 2019 Salihin, Norafizah QC Physics This study focuses on the synthesis and characterization of undoped and aluminium (Al) doped ZnO nanostructures for examples nanoflowers, nanorods, nanowires and nanopetals grown by thermal evaporation method. Samples were grown on silicon (100) substrate. The silicon substrate was placed at 17 cm away from zinc target and aluminium powder mixture mounted on horizontal quartz tube under controlled oxygen. The aluminium concentration dependent morphology, crystalline structure and optical properties of these prepared nanostructures were determined. Samples were characterized using field emission scanning electron microscopy, energy dispersive X-ray analysis (EDX), X-ray diffraction (XRD), Raman spectroscopy, ultraviolet-visible (UV-Vis) spectroscopy and photoluminescence spectroscopy. As the Al dopant concentrations increased, the morphology of ZnO changed from uniform nanoflowers to randomly oriented nanostructures. The flower-like ZnO:Al nanorods have the length of about 333 nm and diameter of about 117 nm. The optimum dopant concentration which can produce uniform size, length and diameter was found to be 0.5 at% of Al. EDX analyses revealed the presence of Zn, O, and Al in the samples. From XRD patterns, the samples had high degree of crystallization with crystallite sizes of about 24.66 nm to 46.98 nm. The ZnO:Al nanoflowers also exhibited a strong ultra-violet emission at 380 nm. Additionally, the band gap energy of ZnO:Al was not significantly changed as found from UV-Vis analyses at 3.24 eV. The concentration of Al plays a significant important role in controlling structural, morphological and optical properties of ZnO nanostructures. The ZnO:Al nanostructures are expected for future technological application due to its impact on optical properties. 2019 Thesis http://eprints.utm.my/id/eprint/81536/ http://eprints.utm.my/id/eprint/81536/1/NorafizahSalihinMFS2019.pdf application/pdf en public http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:125159 masters Universiti Teknologi Malaysia Physics
institution	Universiti Teknologi Malaysia
collection	UTM Institutional Repository
language	English
topic	QC Physics
spellingShingle	QC Physics Salihin, Norafizah Characterization of aluminium doped zinc oxide nanostructures synthesized by thermal evaporation method
description	This study focuses on the synthesis and characterization of undoped and aluminium (Al) doped ZnO nanostructures for examples nanoflowers, nanorods, nanowires and nanopetals grown by thermal evaporation method. Samples were grown on silicon (100) substrate. The silicon substrate was placed at 17 cm away from zinc target and aluminium powder mixture mounted on horizontal quartz tube under controlled oxygen. The aluminium concentration dependent morphology, crystalline structure and optical properties of these prepared nanostructures were determined. Samples were characterized using field emission scanning electron microscopy, energy dispersive X-ray analysis (EDX), X-ray diffraction (XRD), Raman spectroscopy, ultraviolet-visible (UV-Vis) spectroscopy and photoluminescence spectroscopy. As the Al dopant concentrations increased, the morphology of ZnO changed from uniform nanoflowers to randomly oriented nanostructures. The flower-like ZnO:Al nanorods have the length of about 333 nm and diameter of about 117 nm. The optimum dopant concentration which can produce uniform size, length and diameter was found to be 0.5 at% of Al. EDX analyses revealed the presence of Zn, O, and Al in the samples. From XRD patterns, the samples had high degree of crystallization with crystallite sizes of about 24.66 nm to 46.98 nm. The ZnO:Al nanoflowers also exhibited a strong ultra-violet emission at 380 nm. Additionally, the band gap energy of ZnO:Al was not significantly changed as found from UV-Vis analyses at 3.24 eV. The concentration of Al plays a significant important role in controlling structural, morphological and optical properties of ZnO nanostructures. The ZnO:Al nanostructures are expected for future technological application due to its impact on optical properties.
format	Thesis
qualification_level	Master's degree
author	Salihin, Norafizah
author_facet	Salihin, Norafizah
author_sort	Salihin, Norafizah
title	Characterization of aluminium doped zinc oxide nanostructures synthesized by thermal evaporation method
title_short	Characterization of aluminium doped zinc oxide nanostructures synthesized by thermal evaporation method
title_full	Characterization of aluminium doped zinc oxide nanostructures synthesized by thermal evaporation method
title_fullStr	Characterization of aluminium doped zinc oxide nanostructures synthesized by thermal evaporation method
title_full_unstemmed	Characterization of aluminium doped zinc oxide nanostructures synthesized by thermal evaporation method
title_sort	characterization of aluminium doped zinc oxide nanostructures synthesized by thermal evaporation method
granting_institution	Universiti Teknologi Malaysia
granting_department	Physics
publishDate	2019
url	http://eprints.utm.my/id/eprint/81536/1/NorafizahSalihinMFS2019.pdf
_version_	1747818352708943872

Characterization of aluminium doped zinc oxide nanostructures synthesized by thermal evaporation method

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