Sensitivity optimization of epitaxial graphene-based gas sensors

Sergey Novikov, Alexandre Satrapinski, Natalia Lebedeva, Ilkka Iisakka

    Research output: Contribution to journalArticleScientificpeer-review

    13 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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