Synthesis of zinc oxide nanorods: seed layer annealing effect on electrical conductivity

Orientation of zinc oxide nanorods has a vital role in the performance of nanoscaled-based optoelectronic devices and biosensing. In spite of a lot of research, there is no clear mechanism for the growth and orientation of ZnO nanorods during hydrothermal deposition. Beside the other properties of Z...

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Main Author:	Iqbal, Younas
Format:	Thesis
Language:	English English English
Published:	2018
Subjects:	TP200-248 Chemicals: Manufacture use etc.
Online Access:	http://eprints.uthm.edu.my/282/1/24p%20YOUNAS%20IQBAL.pdf http://eprints.uthm.edu.my/282/2/YOUNAS%20IQBAL%20COPYRIGHT%20DECLARATION.pdf http://eprints.uthm.edu.my/282/3/YOUNAS%20IQBAL%20WATERMARK.pdf
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spelling	my-uthm-ep.2822021-07-21T02:23:22Z Synthesis of zinc oxide nanorods: seed layer annealing effect on electrical conductivity 2018-04 Iqbal, Younas TP200-248 Chemicals: Manufacture, use, etc. Orientation of zinc oxide nanorods has a vital role in the performance of nanoscaled-based optoelectronic devices and biosensing. In spite of a lot of research, there is no clear mechanism for the growth and orientation of ZnO nanorods during hydrothermal deposition. Beside the other properties of ZnO nanorods the electron transport properties and electron conduction are very important, in successful immobilization of various biomolecules in the field of biosensing. In current study the orientated ZnO nanorods were fabricated through hydrothermal method from a lowest possible precursor concentration. The precursors concentration was varied from 1 to 9 mM at constant deposition time (6 hours) and temperature (90◦ C), on annealed (500 ◦C) and un annealed gold seed layers. The mean square roughness of annealed and un annealed seed layers are 6.711 and 8.839 nm respectively. The morphological study of the prepared ZnO nanorods revealed a clear improvement in orientation of ZnO nanorods grown on annealed seed layer compared to un annealed seed layer. The structural characterization through XRD reveals that there is a clear peak (002) in all the concentrations on annealed seed layer. The elemental analysis showed the presence of zinc and oxygen in all concentration along with gold, which was detected from the glass substrate coated with gold. The FTIR analysis revealed very less number of bands for oriented ZnO nanorods compared to the un oriented nanorods. These analyses were confirmed by conductivity test conducting using four point probe, which shows the conductivity of oriented ZnO nanorods grown on annealed gold seed is very much higher (up to 90.909 S/m) than the un oriented ZnO nanorods (maximum value 11.574 S/m) grown on un annealed gold seed layer. From the results it is concluded that the seed layer roughness has a vital role in orientation of ZnO nanorods which has a good effect on the electrical conductivity of ZnO nanorods. 2018-04 Thesis http://eprints.uthm.edu.my/282/ http://eprints.uthm.edu.my/282/1/24p%20YOUNAS%20IQBAL.pdf text en public http://eprints.uthm.edu.my/282/2/YOUNAS%20IQBAL%20COPYRIGHT%20DECLARATION.pdf text en validuser http://eprints.uthm.edu.my/282/3/YOUNAS%20IQBAL%20WATERMARK.pdf text en validuser phd doctoral Universiti Tun Hussein Onn Malaysia Fakulti Sains Gunaan dan Teknologi
institution	Universiti Tun Hussein Onn Malaysia
collection	UTHM Institutional Repository
language	English English English
topic	TP200-248 Chemicals: Manufacture use etc.
spellingShingle	TP200-248 Chemicals: Manufacture use etc. Iqbal, Younas Synthesis of zinc oxide nanorods: seed layer annealing effect on electrical conductivity
description	Orientation of zinc oxide nanorods has a vital role in the performance of nanoscaled-based optoelectronic devices and biosensing. In spite of a lot of research, there is no clear mechanism for the growth and orientation of ZnO nanorods during hydrothermal deposition. Beside the other properties of ZnO nanorods the electron transport properties and electron conduction are very important, in successful immobilization of various biomolecules in the field of biosensing. In current study the orientated ZnO nanorods were fabricated through hydrothermal method from a lowest possible precursor concentration. The precursors concentration was varied from 1 to 9 mM at constant deposition time (6 hours) and temperature (90◦ C), on annealed (500 ◦C) and un annealed gold seed layers. The mean square roughness of annealed and un annealed seed layers are 6.711 and 8.839 nm respectively. The morphological study of the prepared ZnO nanorods revealed a clear improvement in orientation of ZnO nanorods grown on annealed seed layer compared to un annealed seed layer. The structural characterization through XRD reveals that there is a clear peak (002) in all the concentrations on annealed seed layer. The elemental analysis showed the presence of zinc and oxygen in all concentration along with gold, which was detected from the glass substrate coated with gold. The FTIR analysis revealed very less number of bands for oriented ZnO nanorods compared to the un oriented nanorods. These analyses were confirmed by conductivity test conducting using four point probe, which shows the conductivity of oriented ZnO nanorods grown on annealed gold seed is very much higher (up to 90.909 S/m) than the un oriented ZnO nanorods (maximum value 11.574 S/m) grown on un annealed gold seed layer. From the results it is concluded that the seed layer roughness has a vital role in orientation of ZnO nanorods which has a good effect on the electrical conductivity of ZnO nanorods.
format	Thesis
qualification_name	Doctor of Philosophy (PhD.)
qualification_level	Doctorate
author	Iqbal, Younas
author_facet	Iqbal, Younas
author_sort	Iqbal, Younas
title	Synthesis of zinc oxide nanorods: seed layer annealing effect on electrical conductivity
title_short	Synthesis of zinc oxide nanorods: seed layer annealing effect on electrical conductivity
title_full	Synthesis of zinc oxide nanorods: seed layer annealing effect on electrical conductivity
title_fullStr	Synthesis of zinc oxide nanorods: seed layer annealing effect on electrical conductivity
title_full_unstemmed	Synthesis of zinc oxide nanorods: seed layer annealing effect on electrical conductivity
title_sort	synthesis of zinc oxide nanorods: seed layer annealing effect on electrical conductivity
granting_institution	Universiti Tun Hussein Onn Malaysia
granting_department	Fakulti Sains Gunaan dan Teknologi
publishDate	2018
url	http://eprints.uthm.edu.my/282/1/24p%20YOUNAS%20IQBAL.pdf http://eprints.uthm.edu.my/282/2/YOUNAS%20IQBAL%20COPYRIGHT%20DECLARATION.pdf http://eprints.uthm.edu.my/282/3/YOUNAS%20IQBAL%20WATERMARK.pdf
_version_	1747830572483346432

Synthesis of zinc oxide nanorods: seed layer annealing effect on electrical conductivity

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