Graphene-based nitrogen dioxide gas sensors

G. Ko; H. Y. Kim; J. Ahn; Y. M. Park; K. Y. Lee; J. Kim

doi:10.1016/j.cap.2009.12.024

Graphene-based nitrogen dioxide gas sensors

G. Ko, H. Y. Kim, J. Ahn, Y. M. Park, K. Y. Lee, J. Kim

Department of Chemical and Biological Engineering

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

287 Citations (Scopus)

Abstract

In this study, we demonstrated that graphene could selectively absorb/desorb NO_x molecules at room temperature. Chemical doping with NO₂ molecules changed the conductivity of the graphene layers, which was quantified by monitoring the current-voltage characteristics at various NO₂ gas concentrations. The adsorption rate was found to be more rapid than the desorption rate, which can be attributed to the reaction occurred on the surface of the graphene layer. The sensitivity was 9% when an ambient of 100 ppm NO₂ was used. Graphene-based gas sensors showed fast response, good reversibility, selectivity and high sensitivity. Optimization of the sensor design and integration with UV-LEDs and Silicon microelectronics will open the door for the development of nano-sized gas sensors that are extremely sensitive.

Original language	English
Pages (from-to)	1002-1004
Number of pages	3
Journal	Current Applied Physics
Volume	10
Issue number	4
DOIs	https://doi.org/10.1016/j.cap.2009.12.024
Publication status	Published - 2010 Jul

Keywords

Gas sensors
Graphene
Nitrogen dioxide

ASJC Scopus subject areas

Materials Science(all)
Physics and Astronomy(all)

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10.1016/j.cap.2009.12.024

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title = "Graphene-based nitrogen dioxide gas sensors",

abstract = "In this study, we demonstrated that graphene could selectively absorb/desorb NOx molecules at room temperature. Chemical doping with NO2 molecules changed the conductivity of the graphene layers, which was quantified by monitoring the current-voltage characteristics at various NO2 gas concentrations. The adsorption rate was found to be more rapid than the desorption rate, which can be attributed to the reaction occurred on the surface of the graphene layer. The sensitivity was 9% when an ambient of 100 ppm NO2 was used. Graphene-based gas sensors showed fast response, good reversibility, selectivity and high sensitivity. Optimization of the sensor design and integration with UV-LEDs and Silicon microelectronics will open the door for the development of nano-sized gas sensors that are extremely sensitive.",

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AU - Ko, G.

AU - Kim, H. Y.

AU - Ahn, J.

AU - Park, Y. M.

AU - Lee, K. Y.

AU - Kim, J.

PY - 2010/7

Y1 - 2010/7

N2 - In this study, we demonstrated that graphene could selectively absorb/desorb NOx molecules at room temperature. Chemical doping with NO2 molecules changed the conductivity of the graphene layers, which was quantified by monitoring the current-voltage characteristics at various NO2 gas concentrations. The adsorption rate was found to be more rapid than the desorption rate, which can be attributed to the reaction occurred on the surface of the graphene layer. The sensitivity was 9% when an ambient of 100 ppm NO2 was used. Graphene-based gas sensors showed fast response, good reversibility, selectivity and high sensitivity. Optimization of the sensor design and integration with UV-LEDs and Silicon microelectronics will open the door for the development of nano-sized gas sensors that are extremely sensitive.

AB - In this study, we demonstrated that graphene could selectively absorb/desorb NOx molecules at room temperature. Chemical doping with NO2 molecules changed the conductivity of the graphene layers, which was quantified by monitoring the current-voltage characteristics at various NO2 gas concentrations. The adsorption rate was found to be more rapid than the desorption rate, which can be attributed to the reaction occurred on the surface of the graphene layer. The sensitivity was 9% when an ambient of 100 ppm NO2 was used. Graphene-based gas sensors showed fast response, good reversibility, selectivity and high sensitivity. Optimization of the sensor design and integration with UV-LEDs and Silicon microelectronics will open the door for the development of nano-sized gas sensors that are extremely sensitive.

KW - Gas sensors

KW - Graphene

KW - Nitrogen dioxide

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Graphene-based nitrogen dioxide gas sensors

Abstract

Keywords

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