RFID passive gas sensor integrating carbon nanotubes

C. Occhiuzzi, A. Rida, G. Marrocco, M. Tentzeris

    Research output: Contribution to journalArticleScientificpeer-review

    75 Citations (Scopus)

    Abstract

    Carbon nanotube (CNT) composites are sensitive to the presence of gases due to their high surface-to-volume ratio and hollow structure that are well suited for gas molecule absorption and storage. Such sensing capability is here integrated with UHF RF identification (RFID) technology to achieve passive and low-cost sensors, remotely readable. CNT film (buckypaper) is used as a localized variable resistive load integrated into a tag antenna, which becomes able to transduce the presence of hazardous gas in the environment, ammonia in this case, into a change of its electromagnetic features. The dynamic range and the hysteresis of the radio sensor are investigated by simulations, equivalent circuits, and articulated experimentations within a true RFID link, providing the proof of concept and some guidelines for tag design.

    Original languageEnglish
    Article number6003806
    Pages (from-to)2674-2684
    Number of pages11
    JournalIEEE Transactions on Microwave Theory and Techniques
    Volume59
    Issue number10 PART 2
    DOIs
    Publication statusPublished - 2011
    Publication typeA1 Journal article-refereed

    Keywords

    • Nanotube
    • Passive gas sensor
    • RF identification (RFID)

    ASJC Scopus subject areas

    • Radiation
    • Condensed Matter Physics
    • Electrical and Electronic Engineering

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