Humidity and temperature effects on carbon nanotube field-effect transistor-based gas sensors

Ning Peng; Qing Zhang; Yi Chau Lee; Hui Huang; Ooi Kiang Tan; Jingze Tian; Lap Chan

doi:10.1166/sl.2008.503

Humidity and temperature effects on carbon nanotube field-effect transistor-based gas sensors

Ning Peng, Qing Zhang^*, Yi Chau Lee, Hui Huang, Ooi Kiang Tan, Jingze Tian, Lap Chan

^*Corresponding author for this work

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

7 Citations (Scopus)

Abstract

Carbon nanotube based field effect transistors are used for detection of NH₃ and NO₂. The detection mechanism is attributed to the modulation in Schottky barrier height at the metal-carbon nanotube interface by the gas molecules. We find that an increase in humidity weakens the gate control and decreases the sensitivities to NH₃ and NO₂. In addition, the sensitivity diminishes significantly when temperature increases from room temperature to 150 °C.

Original language	English
Pages (from-to)	796-799
Number of pages	4
Journal	Sensor Letters
Volume	6
Issue number	6
DOIs	https://doi.org/10.1166/sl.2008.503
Publication status	Published - Dec 2008
Externally published	Yes

ASJC Scopus Subject Areas

Atomic and Molecular Physics, and Optics
Electrical and Electronic Engineering

Keywords

Carbon nanotube
Gas sensor
Schottky barrier

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10.1166/sl.2008.503

Cite this

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abstract = "Carbon nanotube based field effect transistors are used for detection of NH3 and NO2. The detection mechanism is attributed to the modulation in Schottky barrier height at the metal-carbon nanotube interface by the gas molecules. We find that an increase in humidity weakens the gate control and decreases the sensitivities to NH3 and NO2. In addition, the sensitivity diminishes significantly when temperature increases from room temperature to 150 °C.",

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author = "Ning Peng and Qing Zhang and Lee, {Yi Chau} and Hui Huang and Tan, {Ooi Kiang} and Jingze Tian and Lap Chan",

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AU - Peng, Ning

AU - Zhang, Qing

AU - Lee, Yi Chau

AU - Huang, Hui

AU - Tan, Ooi Kiang

AU - Tian, Jingze

AU - Chan, Lap

PY - 2008/12

Y1 - 2008/12

N2 - Carbon nanotube based field effect transistors are used for detection of NH3 and NO2. The detection mechanism is attributed to the modulation in Schottky barrier height at the metal-carbon nanotube interface by the gas molecules. We find that an increase in humidity weakens the gate control and decreases the sensitivities to NH3 and NO2. In addition, the sensitivity diminishes significantly when temperature increases from room temperature to 150 °C.

AB - Carbon nanotube based field effect transistors are used for detection of NH3 and NO2. The detection mechanism is attributed to the modulation in Schottky barrier height at the metal-carbon nanotube interface by the gas molecules. We find that an increase in humidity weakens the gate control and decreases the sensitivities to NH3 and NO2. In addition, the sensitivity diminishes significantly when temperature increases from room temperature to 150 °C.

KW - Carbon nanotube

KW - Gas sensor

KW - Schottky barrier

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ER -

Humidity and temperature effects on carbon nanotube field-effect transistor-based gas sensors

Abstract

ASJC Scopus Subject Areas

Keywords

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