Ethanol sensing behaviour of tin doped zinc oxide/tin oxide composited nanorod arrays on magnesium-aluminium co-doped zinc oxide seeded layer / Ruziana Mohamed

Ethanol sensing behaviour of tin doped zinc oxide/tin oxide composited nanorod arrays on magnesium-aluminium co-doped zinc oxide seeded layer / Ruziana Mohamed

The ethanol sensor device fabrication was carried out using undoped zinc oxide nanorod (ZnO NR) arrays, tin doped zinc oxide nanorod (Sn:ZnO NR) arrays and novel nanostructured tin doped zinc oxide/tin oxide nanorod (Sn: ZnO/SnO2 NR) arrays film. The sensor consists of a thin film nanostructured dep...

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Main Author: Mohamed, Ruziana
Format: Thesis
Language:English
Published: 2018
Subjects:
Electronics
Online Access:https://ir.uitm.edu.my/id/eprint/27964/3/27964.pdf
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spelling my-uitm-ir.279642024-05-02T07:38:37Z Ethanol sensing behaviour of tin doped zinc oxide/tin oxide composited nanorod arrays on magnesium-aluminium co-doped zinc oxide seeded layer / Ruziana Mohamed 2018 Mohamed, Ruziana Electronics The ethanol sensor device fabrication was carried out using undoped zinc oxide nanorod (ZnO NR) arrays, tin doped zinc oxide nanorod (Sn:ZnO NR) arrays and novel nanostructured tin doped zinc oxide/tin oxide nanorod (Sn: ZnO/SnO2 NR) arrays film. The sensor consists of a thin film nanostructured deposited on the novel seed layer magnesium-aluminium co-doped zinc oxide (MAZO) coated glass using solution immersion technique. The thin film nanostructures were investigated using X-ray diffraction analysis, energy-dispersive X-ray spectroscopy, field emission scanning electron microsopy, atomic force microscopy, photoluminescence spectrometry, ultraviolet-visible-near-infrared spectrometry, thickness profilometry and two-probe current-voltage measurement system. The sensor performance was analysed based on the change in electrical conductivity upon gas adsorption when ethanol gas was exposed to nanorod arrays film that act as sensing materials. The growth of ZnO NR arrays film was influenced by many factors. In this study, some parameters have been done for ethanol sensor application such as doping process (undoped, single doped and co-doped ZnO seed layer), the variation of coating seed layers (one to nine coating layers), the effect of ZnO NR arrays growth on variation coating layers (one to nine coating layers), the effect of ZnO NR arrays growth at different immersion time (15-90 min), the effect of doping process for ZnO NR arrays (undoped and Sn doped) and the effect of pH of SnO2 solution to the growth of Sn:ZnO/SnO2 NR arrays. The conductometric sensor system was set up to study the sensing sensitivity, response and recovery time and selectivity properties towards ethanol gas. The sensor response for Sn:ZnO/SnO2 NR arrays was 20. It was observed that the Sn:ZnO/SnO2 NR arrays film showed the highest response to the presence of ethanol gas compared ZnO and Sn: ZnO NR arrays. The Sn:ZnO/SnO2 NR arrays showed the shorter of response and recovery time which was around 81 and 63 s, respectively. The sensing sensitivity of Sn:ZnO/SnO2 NR arrays prepared at pH 5.5 of SnO2 solution was increased from 2.4 to 5.2 with an increase of ethanol concentration range 60 to 300 ppm. The Sn:ZnO/SnO2 NR arrays prepared at pH 5.5 of SnO2 solution also showed the increasing of sensing sensitivity value range 2.5 to 8.0 when the working temperature is increased from 60 to 140°C. It also was observed that the Sn:ZnO/SnO2 NR arrays have good selectivity properties towards ehanol vapor as compared to acetone and propanol vapor. 2018 Thesis https://ir.uitm.edu.my/id/eprint/27964/ https://ir.uitm.edu.my/id/eprint/27964/3/27964.pdf text en public phd doctoral Universiti Teknologi MARA Faculty of Electrical Engineering
institution Universiti Teknologi MARA
collection UiTM Institutional Repository
language English
topic Electronics
spellingShingle Electronics
Mohamed, Ruziana
Ethanol sensing behaviour of tin doped zinc oxide/tin oxide composited nanorod arrays on magnesium-aluminium co-doped zinc oxide seeded layer / Ruziana Mohamed
description The ethanol sensor device fabrication was carried out using undoped zinc oxide nanorod (ZnO NR) arrays, tin doped zinc oxide nanorod (Sn:ZnO NR) arrays and novel nanostructured tin doped zinc oxide/tin oxide nanorod (Sn: ZnO/SnO2 NR) arrays film. The sensor consists of a thin film nanostructured deposited on the novel seed layer magnesium-aluminium co-doped zinc oxide (MAZO) coated glass using solution immersion technique. The thin film nanostructures were investigated using X-ray diffraction analysis, energy-dispersive X-ray spectroscopy, field emission scanning electron microsopy, atomic force microscopy, photoluminescence spectrometry, ultraviolet-visible-near-infrared spectrometry, thickness profilometry and two-probe current-voltage measurement system. The sensor performance was analysed based on the change in electrical conductivity upon gas adsorption when ethanol gas was exposed to nanorod arrays film that act as sensing materials. The growth of ZnO NR arrays film was influenced by many factors. In this study, some parameters have been done for ethanol sensor application such as doping process (undoped, single doped and co-doped ZnO seed layer), the variation of coating seed layers (one to nine coating layers), the effect of ZnO NR arrays growth on variation coating layers (one to nine coating layers), the effect of ZnO NR arrays growth at different immersion time (15-90 min), the effect of doping process for ZnO NR arrays (undoped and Sn doped) and the effect of pH of SnO2 solution to the growth of Sn:ZnO/SnO2 NR arrays. The conductometric sensor system was set up to study the sensing sensitivity, response and recovery time and selectivity properties towards ethanol gas. The sensor response for Sn:ZnO/SnO2 NR arrays was 20. It was observed that the Sn:ZnO/SnO2 NR arrays film showed the highest response to the presence of ethanol gas compared ZnO and Sn: ZnO NR arrays. The Sn:ZnO/SnO2 NR arrays showed the shorter of response and recovery time which was around 81 and 63 s, respectively. The sensing sensitivity of Sn:ZnO/SnO2 NR arrays prepared at pH 5.5 of SnO2 solution was increased from 2.4 to 5.2 with an increase of ethanol concentration range 60 to 300 ppm. The Sn:ZnO/SnO2 NR arrays prepared at pH 5.5 of SnO2 solution also showed the increasing of sensing sensitivity value range 2.5 to 8.0 when the working temperature is increased from 60 to 140°C. It also was observed that the Sn:ZnO/SnO2 NR arrays have good selectivity properties towards ehanol vapor as compared to acetone and propanol vapor.
format Thesis
qualification_name Doctor of Philosophy (PhD.)
qualification_level Doctorate
author Mohamed, Ruziana
author_facet Mohamed, Ruziana
author_sort Mohamed, Ruziana
title Ethanol sensing behaviour of tin doped zinc oxide/tin oxide composited nanorod arrays on magnesium-aluminium co-doped zinc oxide seeded layer / Ruziana Mohamed
title_short Ethanol sensing behaviour of tin doped zinc oxide/tin oxide composited nanorod arrays on magnesium-aluminium co-doped zinc oxide seeded layer / Ruziana Mohamed
title_full Ethanol sensing behaviour of tin doped zinc oxide/tin oxide composited nanorod arrays on magnesium-aluminium co-doped zinc oxide seeded layer / Ruziana Mohamed
title_fullStr Ethanol sensing behaviour of tin doped zinc oxide/tin oxide composited nanorod arrays on magnesium-aluminium co-doped zinc oxide seeded layer / Ruziana Mohamed
title_full_unstemmed Ethanol sensing behaviour of tin doped zinc oxide/tin oxide composited nanorod arrays on magnesium-aluminium co-doped zinc oxide seeded layer / Ruziana Mohamed
title_sort ethanol sensing behaviour of tin doped zinc oxide/tin oxide composited nanorod arrays on magnesium-aluminium co-doped zinc oxide seeded layer / ruziana mohamed
granting_institution Universiti Teknologi MARA
granting_department Faculty of Electrical Engineering
publishDate 2018
url https://ir.uitm.edu.my/id/eprint/27964/3/27964.pdf
_version_ 1804889616095903744

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