Bias modulated highly sensitive NO2 gas detection using carbon nanotubes

Jong Hong Lee; Joondong Kim; Hee Won Seo; Jin Won Song; Eung Sug Lee; Mooncheol Won; Chang Soo Han

doi:10.1016/j.snb.2007.09.045

Bias modulated highly sensitive NO₂ gas detection using carbon nanotubes

Jong Hong Lee, Joondong Kim, Hee Won Seo, Jin Won Song, Eung Sug Lee, Mooncheol Won, Chang Soo Han

Research output: Contribution to journal › Article › peer-review

28 Citations (Scopus)

Abstract

A NO₂ gas sensor of carbon nanotubes (CNT) array was fabricated by a dielectrophoretic method. It is the first report of 50 ppb level detection operating at room temperature without a supplementary assistance of a heating system, vacuum environment, metal decoration, or additional film coating. The as-deposited CNTs on Pt electrodes by dropping of a CNT cropped solution provided good contact formation without post contact treatment. The bias voltage modulation improved the sensor performance by controlling the Schottky barrier potential. It is highly sensitive NO₂ detection at room temperature, which may benefit to reduce the fabrication steps and cost as well.

Original language	English
Pages (from-to)	628-631
Number of pages	4
Journal	Sensors and Actuators, B: Chemical
Volume	129
Issue number	2
DOIs	https://doi.org/10.1016/j.snb.2007.09.045
Publication status	Published - 2008 Feb 22
Externally published	Yes

Keywords

50 ppb NO detection
Carbon nanotube
Dielectrophoretic
Room temperature
Schottky barrier

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Instrumentation
Condensed Matter Physics
Surfaces, Coatings and Films
Metals and Alloys
Electrical and Electronic Engineering
Materials Chemistry

Access to Document

10.1016/j.snb.2007.09.045

Cite this

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title = "Bias modulated highly sensitive NO2 gas detection using carbon nanotubes",

abstract = "A NO2 gas sensor of carbon nanotubes (CNT) array was fabricated by a dielectrophoretic method. It is the first report of 50 ppb level detection operating at room temperature without a supplementary assistance of a heating system, vacuum environment, metal decoration, or additional film coating. The as-deposited CNTs on Pt electrodes by dropping of a CNT cropped solution provided good contact formation without post contact treatment. The bias voltage modulation improved the sensor performance by controlling the Schottky barrier potential. It is highly sensitive NO2 detection at room temperature, which may benefit to reduce the fabrication steps and cost as well.",

keywords = "50 ppb NO detection, Carbon nanotube, Dielectrophoretic, Room temperature, Schottky barrier",

author = "Lee, {Jong Hong} and Joondong Kim and Seo, {Hee Won} and Song, {Jin Won} and Lee, {Eung Sug} and Mooncheol Won and Han, {Chang Soo}",

note = "Funding Information: We acknowledge the financial support from Daedeok Innopolis and Center for Nanoscale Mechatronics & Manufacturing of the 21C Frontier Research Program by the Ministry of Science and Technology (MOST) in Korea. ",

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T1 - Bias modulated highly sensitive NO2 gas detection using carbon nanotubes

AU - Lee, Jong Hong

AU - Kim, Joondong

AU - Seo, Hee Won

AU - Song, Jin Won

AU - Lee, Eung Sug

AU - Won, Mooncheol

AU - Han, Chang Soo

N1 - Funding Information: We acknowledge the financial support from Daedeok Innopolis and Center for Nanoscale Mechatronics & Manufacturing of the 21C Frontier Research Program by the Ministry of Science and Technology (MOST) in Korea.

PY - 2008/2/22

Y1 - 2008/2/22

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AB - A NO2 gas sensor of carbon nanotubes (CNT) array was fabricated by a dielectrophoretic method. It is the first report of 50 ppb level detection operating at room temperature without a supplementary assistance of a heating system, vacuum environment, metal decoration, or additional film coating. The as-deposited CNTs on Pt electrodes by dropping of a CNT cropped solution provided good contact formation without post contact treatment. The bias voltage modulation improved the sensor performance by controlling the Schottky barrier potential. It is highly sensitive NO2 detection at room temperature, which may benefit to reduce the fabrication steps and cost as well.

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KW - Schottky barrier

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