Ultra-sensitive NO2 gas sensor based on epitaxial graphene

Sergey Novikov, Natalia Lebedeva, Alexandre Satrapinski

Research output: Contribution to journalArticleScientificpeer-review

26 Citations (Scopus)

Abstract

We report about technology of fabrication and optimization of a gas sensor based on epitaxial graphene. Optimized graphene/metal contact configuration exhibited low contact resistance. Complementary annealing of graphene sensor after each gas exposure led to significant improvement in the sensing performance. The response of the annealed sensor to the nitrogen dioxide (NO2) was tenfold higher than that of an as-fabricated graphene sensor. NO2 concentration as low as 0.2 parts per billion (ppb) was easily detectable. Devices have high signal-to-noise ratio. The detection limit of the graphene sensor was estimated to be 0.6?ppt (parts per trillion). The present technology with additional annealing improves the performance of the graphene based sensor and makes it suitable for the environmental nitrogen dioxide gas monitoring.
Original languageEnglish
Article number108581
Number of pages7
JournalJournal of Sensors
Volume2015
DOIs
Publication statusPublished - 2015
MoE publication typeA1 Journal article-refereed

Fingerprint

Chemical sensors
Graphene
graphene
sensors
gases
Sensors
nitrogen dioxide
Annealing
Nitrogen
annealing
Contact resistance
contact resistance
Gases
electric contacts
Signal to noise ratio
signal to noise ratios
Fabrication
fabrication
optimization
Monitoring

Keywords

  • gas sensor
  • epitaxial graphene
  • sensitivity

Cite this

Novikov, Sergey ; Lebedeva, Natalia ; Satrapinski, Alexandre. / Ultra-sensitive NO2 gas sensor based on epitaxial graphene. In: Journal of Sensors. 2015 ; Vol. 2015.
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Ultra-sensitive NO2 gas sensor based on epitaxial graphene. / Novikov, Sergey; Lebedeva, Natalia; Satrapinski, Alexandre.

In: Journal of Sensors, Vol. 2015, 108581, 2015.

Research output: Contribution to journalArticleScientificpeer-review

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