Graphene-based nitrogen dioxide gas sensors

G. Ko, H. Y. Kim, J. Ahn, Y. M. Park, Kwan Young Lee, Ji Hyun Kim

Research output: Contribution to journalArticle

195 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)1002-1004
Number of pages3
JournalCurrent Applied Physics
Volume10
Issue number4
DOIs
Publication statusPublished - 2010 Jul 1

Fingerprint

Nitrogen Dioxide
nitrogen dioxide
Graphite
Chemical sensors
Graphene
graphene
Nitrogen
sensors
gases
Molecules
sensitivity
Silicon
Current voltage characteristics
microelectronics
Microelectronics
Light emitting diodes
molecules
Desorption
light emitting diodes
Gases

Keywords

  • Gas sensors
  • Graphene
  • Nitrogen dioxide

ASJC Scopus subject areas

  • Materials Science(all)
  • Physics and Astronomy(all)

Cite this

Graphene-based nitrogen dioxide gas sensors. / Ko, G.; Kim, H. Y.; Ahn, J.; Park, Y. M.; Lee, Kwan Young; Kim, Ji Hyun.

In: Current Applied Physics, Vol. 10, No. 4, 01.07.2010, p. 1002-1004.

Research output: Contribution to journalArticle

Ko, G. ; Kim, H. Y. ; Ahn, J. ; Park, Y. M. ; Lee, Kwan Young ; Kim, Ji Hyun. / Graphene-based nitrogen dioxide gas sensors. In: Current Applied Physics. 2010 ; Vol. 10, No. 4. pp. 1002-1004.
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