Chemically modified field-effect transistors; a sodium ion selective sensor based on calix[4]arene receptor molecules

J.A.J. Brunink, Jan R. Haak, Johan G. Bomer, David Reinhoudt, M. Anthony McKervey, Stephen J. Harris

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    Abstract

    The development of an ion-sensitive field-effect transistor for sodium ions is described. Cahx[4]arene derivatives incorporated in a poly(vinyl chloride)-based membrane provide the selectivity. A poly(2-hydroxyethyl methacrylate) interlayer between the silicon dioxide gate and the sensing membrane is necessary to obtain a Na+-sensitive ISFET with Nernstian behaviour. The potentiometric selectivity coefficients (log Kij pot) for Na+ over K+ and Li+ are ¿1.9 and ¿2.5,
    Original languageEnglish
    Pages (from-to)75-80
    Number of pages6
    JournalAnalytica chimica acta
    Volume0
    Issue number254
    DOIs
    Publication statusPublished - 1991

    Keywords

    • METIS-106724
    • IR-12543

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