A simple approach in fabricating chemical sensor using laterally grown multi-walled carbon nanotubes

Yoon Taek Jang; Seung Il Moon; Jin Ho Ahn; Yun Hi Lee; Byeong Kwon Ju

doi:10.1016/j.snb.2003.11.004

A simple approach in fabricating chemical sensor using laterally grown multi-walled carbon nanotubes

Yoon Taek Jang, Seung Il Moon, Jin Ho Ahn, Yun Hi Lee, Byeong Kwon Ju

Department of Physics

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

110 Citations (Scopus)

Abstract

In this work, we proposed a new process for fabricating chemical sensors employing multi-walled carbon nanotubes (MWNTs) as the active sensing element. The MWNTs were selectively grown between lateral sides of the catalytic metals on pre-defined Nb electrodes. Upon exposure to air or NH₃, the electrical resistance of the MWNTs is found to decrease or increase, respectively. The response time decreases and the sensitivity increases while measurement temperature and gas concentration increase. Though there are a few technical problems to be solved, our results show a promising technique for chemical gas sensor.

Original language	English
Pages (from-to)	118-122
Number of pages	5
Journal	Sensors and Actuators, B: Chemical
Volume	99
Issue number	1
DOIs	https://doi.org/10.1016/j.snb.2003.11.004
Publication status	Published - 2004 Apr 15

Keywords

CVD
Gas sensor
Lateral growth
Multi-walled carbon nanotube

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

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10.1016/j.snb.2003.11.004

Cite this

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title = "A simple approach in fabricating chemical sensor using laterally grown multi-walled carbon nanotubes",

abstract = "In this work, we proposed a new process for fabricating chemical sensors employing multi-walled carbon nanotubes (MWNTs) as the active sensing element. The MWNTs were selectively grown between lateral sides of the catalytic metals on pre-defined Nb electrodes. Upon exposure to air or NH3, the electrical resistance of the MWNTs is found to decrease or increase, respectively. The response time decreases and the sensitivity increases while measurement temperature and gas concentration increase. Though there are a few technical problems to be solved, our results show a promising technique for chemical gas sensor.",

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note = "Funding Information: This work was supported by the Ministry of Science and Technology and the Ministry of Industry and Energy under IMT 2000 Nano Technology Development Program. Copyright: Copyright 2008 Elsevier B.V., All rights reserved.",

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AU - Ahn, Jin Ho

AU - Lee, Yun Hi

AU - Ju, Byeong Kwon

N1 - Funding Information: This work was supported by the Ministry of Science and Technology and the Ministry of Industry and Energy under IMT 2000 Nano Technology Development Program. Copyright: Copyright 2008 Elsevier B.V., All rights reserved.

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N2 - In this work, we proposed a new process for fabricating chemical sensors employing multi-walled carbon nanotubes (MWNTs) as the active sensing element. The MWNTs were selectively grown between lateral sides of the catalytic metals on pre-defined Nb electrodes. Upon exposure to air or NH3, the electrical resistance of the MWNTs is found to decrease or increase, respectively. The response time decreases and the sensitivity increases while measurement temperature and gas concentration increase. Though there are a few technical problems to be solved, our results show a promising technique for chemical gas sensor.

AB - In this work, we proposed a new process for fabricating chemical sensors employing multi-walled carbon nanotubes (MWNTs) as the active sensing element. The MWNTs were selectively grown between lateral sides of the catalytic metals on pre-defined Nb electrodes. Upon exposure to air or NH3, the electrical resistance of the MWNTs is found to decrease or increase, respectively. The response time decreases and the sensitivity increases while measurement temperature and gas concentration increase. Though there are a few technical problems to be solved, our results show a promising technique for chemical gas sensor.

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A simple approach in fabricating chemical sensor using laterally grown multi-walled carbon nanotubes

Abstract

Keywords

ASJC Scopus subject areas

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