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

25 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

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

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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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AU - Han, Chang Soo

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