An e-nose concept based on semiconductor-assisted field ionization and gaseous discharge on arrays of whiskered nanowires

Ramin Banan Sadeghian

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    1 Citation (Scopus)

    Abstract

    Electronic nose systems employ an array of gas detectors each tailored to respond differently to a range of odors. In the presence of a particular gaseous compound, the responses of sensors form a signature that is analyzed in the signal transduction process. The gas sensing cells operate by a variety of different mechanisms, but generally, catalyst based sensors suffer from issues such as poor specificity, slow response time, and irreversibility. This work introduces a novel approach towards instantaneous and selective discrimination of gases based on their unique ionization properties: electric breakdown voltage and field ionization current-voltage characteristic. Synthesized gold and silicon nanowires, covered with sharp nanoscale whiskers, exhibited anomalously strong discharge and field ionization characteristics at very low bias voltages. The anomalous field ionization phenomenon was attributed to the combination of geometric field enhancement and the presence of localized surface states at the surface of the emitters.

    Original languageEnglish
    Title of host publication2013 35th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBC 2013
    Pages5650-5653
    Number of pages4
    DOIs
    Publication statusPublished - 2013 Oct 31
    Event2013 35th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBC 2013 - Osaka, Japan
    Duration: 2013 Jul 32013 Jul 7

    Publication series

    NameProceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS
    ISSN (Print)1557-170X

    Other

    Other2013 35th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBC 2013
    CountryJapan
    CityOsaka
    Period13/7/313/7/7

    Keywords

    • Electronic nose
    • electric breakdown
    • field ionization
    • field-enhancement
    • gas sensor
    • nanowires

    ASJC Scopus subject areas

    • Signal Processing
    • Biomedical Engineering
    • Computer Vision and Pattern Recognition
    • Health Informatics

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  • Cite this

    Sadeghian, R. B. (2013). An e-nose concept based on semiconductor-assisted field ionization and gaseous discharge on arrays of whiskered nanowires. In 2013 35th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBC 2013 (pp. 5650-5653). [6610832] (Proceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS). https://doi.org/10.1109/EMBC.2013.6610832