Single-walled carbon nanotube networks for ethanol vapor sensing applications

Ilya V. Anoshkin, Albert Nasibulin, Prasantha R. Mudimela, Maoshuai He, Vladimir Ermolov, Esko Kauppinen (Supervisor)

    Research output: Contribution to journalArticlepeer-review

    Abstract

    Networks of pristine high quality single walled carbon nanotubes (SWNTs), the
    SWNTs after Ar-plasma treatment (from 2 to 12 min) and carbon nanobuds
    (CNBs) have been tested for ethanol vapor sensing. It was found that the
    pristine high quality SWNTs do not exhibit any ethanol sensitivity, while the
    introduction of defects in the tubes results in the appearance of the ethanol
    sensitivity. The CNB network showed ethanol sensitivity without plasma
    treatment. Both CNB and low defect (after 3 min treatment) SWNT networks
    exhibit significant drift in the resistance baseline, while heavily plasma-treated
    (9 min) SWNTs exhibited high ethanol vapor sensitivity without the baseline
    change. The mechanisms of the ethanol sensitivity and stability after the plasma
    irradiation are attributed to the formation of sensitive dangling bonds in the
    SWNTs and formation of defect channels facilitating access of the ethanol vapor
    to all parts of the bundled nanotubes.
    Original languageEnglish
    Pages (from-to)77-86
    Number of pages10
    JournalNano Research
    Volume6
    Issue number2
    DOIs
    Publication statusPublished - 1 Feb 2013

    Keywords

    • single walled carbon nanotubes
    • carbon nanobuds
    • Ar-plasma
    • ethanol vapor sensor

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