Effect of electrode gap on the sensing properties of multiwalled carbon nanotubes based gas sensor

Vertically aligned multiwalled carbon nanotubes (MWCNT) were grown on Si substrate coated with alumina and iron using chemical vapor deposition. Electrode gap of 10, 25 and 50 μm were adopted to determine the effect of varying gap spacing on the sensing properties such as voltage breakdown, sensiti...

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Main Authors: Saheed, M.S.M., Mohamed, N.M., Burhanudin, Z.A.
Format: Conference or Workshop Item
Institution: Universiti Teknologi Petronas
Record Id / ISBN-0: utp-eprints.30635 /
Published: American Institute of Physics Inc. 2016
Online Access: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85005990904&doi=10.1063%2f1.4968115&partnerID=40&md5=b235c0fa6247eecefb8e2e0cfb983283
http://eprints.utp.edu.my/30635/
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spelling utp-eprints.306352022-03-25T07:13:12Z Effect of electrode gap on the sensing properties of multiwalled carbon nanotubes based gas sensor Saheed, M.S.M. Mohamed, N.M. Burhanudin, Z.A. Vertically aligned multiwalled carbon nanotubes (MWCNT) were grown on Si substrate coated with alumina and iron using chemical vapor deposition. Electrode gap of 10, 25 and 50 μm were adopted to determine the effect of varying gap spacing on the sensing properties such as voltage breakdown, sensitivity and selectivity for three gases namely argon, carbon dioxide and ammonia. Argon has the lowest voltage breakdown for every electrode gap. The fabricated MWCNT based gas sensor drastically reduced the voltage breakdown by 89.5 when the electrode spacing is reduced from 50 μm to 10 μm. The reduction is attributed to the high non-uniform electric field between the electrodes caused by the protrusion of nanotips. The sensor shows good sensitivity and selectivity with the ability to detect the gas in the mixture with air provided that the concentration is � 20 where the voltage breakdown will be close to the pure gas. © 2016 Author(s). American Institute of Physics Inc. 2016 Conference or Workshop Item NonPeerReviewed https://www.scopus.com/inward/record.uri?eid=2-s2.0-85005990904&doi=10.1063%2f1.4968115&partnerID=40&md5=b235c0fa6247eecefb8e2e0cfb983283 Saheed, M.S.M. and Mohamed, N.M. and Burhanudin, Z.A. (2016) Effect of electrode gap on the sensing properties of multiwalled carbon nanotubes based gas sensor. In: UNSPECIFIED. http://eprints.utp.edu.my/30635/
institution Universiti Teknologi Petronas
collection UTP Institutional Repository
description Vertically aligned multiwalled carbon nanotubes (MWCNT) were grown on Si substrate coated with alumina and iron using chemical vapor deposition. Electrode gap of 10, 25 and 50 μm were adopted to determine the effect of varying gap spacing on the sensing properties such as voltage breakdown, sensitivity and selectivity for three gases namely argon, carbon dioxide and ammonia. Argon has the lowest voltage breakdown for every electrode gap. The fabricated MWCNT based gas sensor drastically reduced the voltage breakdown by 89.5 when the electrode spacing is reduced from 50 μm to 10 μm. The reduction is attributed to the high non-uniform electric field between the electrodes caused by the protrusion of nanotips. The sensor shows good sensitivity and selectivity with the ability to detect the gas in the mixture with air provided that the concentration is � 20 where the voltage breakdown will be close to the pure gas. © 2016 Author(s).
format Conference or Workshop Item
author Saheed, M.S.M.
Mohamed, N.M.
Burhanudin, Z.A.
spellingShingle Saheed, M.S.M.
Mohamed, N.M.
Burhanudin, Z.A.
Effect of electrode gap on the sensing properties of multiwalled carbon nanotubes based gas sensor
author_sort Saheed, M.S.M.
title Effect of electrode gap on the sensing properties of multiwalled carbon nanotubes based gas sensor
title_short Effect of electrode gap on the sensing properties of multiwalled carbon nanotubes based gas sensor
title_full Effect of electrode gap on the sensing properties of multiwalled carbon nanotubes based gas sensor
title_fullStr Effect of electrode gap on the sensing properties of multiwalled carbon nanotubes based gas sensor
title_full_unstemmed Effect of electrode gap on the sensing properties of multiwalled carbon nanotubes based gas sensor
title_sort effect of electrode gap on the sensing properties of multiwalled carbon nanotubes based gas sensor
publisher American Institute of Physics Inc.
publishDate 2016
url https://www.scopus.com/inward/record.uri?eid=2-s2.0-85005990904&doi=10.1063%2f1.4968115&partnerID=40&md5=b235c0fa6247eecefb8e2e0cfb983283
http://eprints.utp.edu.my/30635/
_version_ 1741197440659226624
score 11.62408

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