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    New innovations in ionic liquid–based miniaturised amperometric gas sensors

    Access Status
    Fulltext not available
    Embargo Lift Date
    2021-03-15
    Authors
    Silvester-Dean, Debbie
    Date
    2019
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Silvester, D.S. 2019. New innovations in ionic liquid–based miniaturised amperometric gas sensors. Current Opinion in Electrochemistry. 15: pp. 7-17.
    Source Title
    Current Opinion in Electrochemistry
    DOI
    10.1016/j.coelec.2019.03.001
    ISSN
    2451-9103
    Faculty
    Faculty of Science and Engineering
    School
    School of Molecular and Life Sciences (MLS)
    Funding and Sponsorship
    http://purl.org/au-research/grants/arc/FT170100315
    URI
    http://hdl.handle.net/20.500.11937/79837
    Collection
    • Curtin Research Publications
    Abstract

    © 2019 Elsevier B.V.

    Gas detection is an essential part of everyday life; for some applications, using sensors for toxic and hazardous gases can literally mean the difference between life and death. In this minireview, recent progress in amperometric gas sensing using miniaturised electrodes and devices is described. The focus is on the use of nonvolatile room-temperature ionic liquids (RTILs) as electrolytes, which possess inherent advantages such as wide electrochemical windows, high thermal and chemical stability, intrinsic conductivity and good solvating properties. Various different gases, electrodes and RTILs have been investigated in the strive towards new materials for improved gas sensors. The most recent developments using porous membrane electrodes, planar devices (e.g. screen-printed, thin-film, microarray and interdigitated electrodes) and the modification of these surfaces for improved sensitivity are described. RTILs have great potential to be used as electrolytes in amperometric gas sensors, with improved lifespan of the sensor in hot/dry environments and allowing miniaturisation of devices. However, it is clear that more understanding of their long-term operation and utility in real environments (e.g. background air, varying temperatures and humidity levels) is needed before their realisation in successful commercial devices.

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