Sensitivity optimization of epitaxial graphene-based gas sensors

Sergey Novikov, Alexandre Satrapinski, Natalia Lebedeva, Ilkka Iisakka

Research output: Contribution to journalArticleScientificpeer-review

11 Citations (Scopus)

Abstract

Epitaxial 4H-SiC graphene films for use in ambient gas sensing are fabricated and tested. The sensitivity response to nitrogen dioxide is optimized by varying both operation temperatures and humidity. A relative resistance change response of -45% is obtained upon application of elevated temperatures and a gas mixture containing NO2 at a concentration of 10 parts per billion (10 ppb). The sensitivity response increased linearly with NO2 concentration, reaching -60% at a concentration of 250 ppb, followed by saturation at 1 part per million (ppm) level.
Original languageEnglish
Pages (from-to)1859-1864
Number of pages5
JournalIEEE Transactions on Instrumentation and Measurement
Volume62
Issue number6
DOIs
Publication statusPublished - 2013
MoE publication typeA1 Journal article-refereed

Keywords

  • epitaxial graphene
  • gas sensors
  • graphene fabrication
  • measurement techniques
  • sensitivity measurements

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