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

24 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

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Keywords

50 ppb NO detection
Carbon nanotube
Dielectrophoretic
Room temperature
Schottky barrier

ASJC Scopus subject areas

Analytical Chemistry
Electrochemistry
Electrical and Electronic Engineering

Cite this

Lee, J. H., Kim, J., Seo, H. W., Song, J. W., Lee, E. S., Won, M., & Han, C-S. (2008). Bias modulated highly sensitive NO₂ gas detection using carbon nanotubes. Sensors and Actuators, B: Chemical, 129(2), 628-631. https://doi.org/10.1016/j.snb.2007.09.045

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10.1016/j.snb.2007.09.045