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Field emission model of carbon nanotubes to simulate gas breakdown in ionization gas sensor

A new field emission model of carbon nanotubes (CNTs) to simulate gas detection mechanism in CNT based ionization gas sensor has been developed. The new model consists of three modules which are combined together and embedded in the standard particle-in-cell/Monte Carlo collision codes. The functio...

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Main Authors:	Mahmood, Salman, Burhanudin, Zainal Arif, Salman, Aysha
Format:	Article
Published:	American Institute of Physics 2013
Subjects:	QC Physics TK Electrical engineering. Electronics Nuclear engineering
Online Access:	http://jap.aip.org/resource/1/japiau/v113/i2/p023302_s1?isAuthorized=no http://eprints.utp.edu.my/8843/
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spelling	my.utp.eprints.88432013-01-16T02:07:49Z Field emission model of carbon nanotubes to simulate gas breakdown in ionization gas sensor Mahmood, Salman Burhanudin, Zainal Arif Salman, Aysha QC Physics TK Electrical engineering. Electronics Nuclear engineering A new field emission model of carbon nanotubes (CNTs) to simulate gas detection mechanism in CNT based ionization gas sensor has been developed. The new model consists of three modules which are combined together and embedded in the standard particle-in-cell/Monte Carlo collision codes. The functionality of the enhanced model is checked by varying the gas pressure and gap spacing in the simulations. From the results, around one order of magnitude decrease in the breakdown voltages and two orders of magnitude faster response time is observed. The lowest breakdown voltages are observed when intertube spacing is equal to height of the nanotube. The field enhancement factor 9 is calculated from our model and compared with the 9 of the well established model. The closeness among the values of 9 validates the performance of our field emission model. Furthermore, the 9 of our model is compared with the 9 of the existing ionization gas sensors. It was found that the 9 of our sensor is around 3 times better than the 9 of the gold nanowire based ionization gas sensor and 28 times better than the 9 of the other CNT based ionization gas sensor. These results suggest that by properly controlling the growth of CNT structures, an optimized CNT based ionization gas sensor can be realized. American Institute of Physics 2013-01-14 Article PeerReviewed http://jap.aip.org/resource/1/japiau/v113/i2/p023302_s1?isAuthorized=no Mahmood, Salman and Burhanudin, Zainal Arif and Salman, Aysha (2013) Field emission model of carbon nanotubes to simulate gas breakdown in ionization gas sensor. JOURNAL OF APPLIED PHYSICS, 113 (2). 023302-1. ISSN 0021-8979 http://eprints.utp.edu.my/8843/
institution	Universiti Teknologi Petronas
building	UTP Resource Centre
collection	Institutional Repository
continent	Asia
country	Malaysia
content_provider	Universiti Teknologi Petronas
content_source	UTP Institutional Repository
url_provider	http://eprints.utp.edu.my/
topic	QC Physics TK Electrical engineering. Electronics Nuclear engineering
spellingShingle	QC Physics TK Electrical engineering. Electronics Nuclear engineering Mahmood, Salman Burhanudin, Zainal Arif Salman, Aysha Field emission model of carbon nanotubes to simulate gas breakdown in ionization gas sensor
description	A new field emission model of carbon nanotubes (CNTs) to simulate gas detection mechanism in CNT based ionization gas sensor has been developed. The new model consists of three modules which are combined together and embedded in the standard particle-in-cell/Monte Carlo collision codes. The functionality of the enhanced model is checked by varying the gas pressure and gap spacing in the simulations. From the results, around one order of magnitude decrease in the breakdown voltages and two orders of magnitude faster response time is observed. The lowest breakdown voltages are observed when intertube spacing is equal to height of the nanotube. The field enhancement factor 9 is calculated from our model and compared with the 9 of the well established model. The closeness among the values of 9 validates the performance of our field emission model. Furthermore, the 9 of our model is compared with the 9 of the existing ionization gas sensors. It was found that the 9 of our sensor is around 3 times better than the 9 of the gold nanowire based ionization gas sensor and 28 times better than the 9 of the other CNT based ionization gas sensor. These results suggest that by properly controlling the growth of CNT structures, an optimized CNT based ionization gas sensor can be realized.
format	Article
author	Mahmood, Salman Burhanudin, Zainal Arif Salman, Aysha
author_facet	Mahmood, Salman Burhanudin, Zainal Arif Salman, Aysha
author_sort	Mahmood, Salman
title	Field emission model of carbon nanotubes to simulate gas breakdown in ionization gas sensor
title_short	Field emission model of carbon nanotubes to simulate gas breakdown in ionization gas sensor
title_full	Field emission model of carbon nanotubes to simulate gas breakdown in ionization gas sensor
title_fullStr	Field emission model of carbon nanotubes to simulate gas breakdown in ionization gas sensor
title_full_unstemmed	Field emission model of carbon nanotubes to simulate gas breakdown in ionization gas sensor
title_sort	field emission model of carbon nanotubes to simulate gas breakdown in ionization gas sensor
publisher	American Institute of Physics
publishDate	2013
url	http://jap.aip.org/resource/1/japiau/v113/i2/p023302_s1?isAuthorized=no http://eprints.utp.edu.my/8843/
_version_	1738655687759626240
score	13.211869

Field emission model of carbon nanotubes to simulate gas breakdown in ionization gas sensor

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