Study on soluble polypyrrole as a component in all-solid-state ion-sensors

    Tutkimustuotos: LehtiartikkeliArtikkeliTieteellinenvertaisarvioitu

    39 Sitaatiot (Scopus)

    Abstrakti

    Soluble conducting polypyrrole (PPy) was chemically synthesized by using dodecylbenzene sulfonic acid (DBSA) as dopant. Electrodes were prepared by solution casting on glassy carbon (GC) substrates. They were characterized by potentiometric, cyclic voltammetric (CV) and electrochemical impedance spectroscopic (EIS) measurements. PPy(DBSA) modified electrodes showed good reproducible cationic response to Ca with the sensitivity of 27.2 +/- 0.2 mV decade(-1) which remained practically constant over 10 d. The standard potential, however, was found to drift 70 mV over the same time period. The doping process of the PPy(DBSA) film was investigated by cyclic voltammetry and EIS in 0.1 M CaCl2. The most significant change in the impedance spectra of the PPy(DBSA) film takes place between -500 mV and -400 mV which coincides with the beginning of the oxidation wave in the cyclic voltammogram of the film. The impedance spectra were fitted to an equivalent circuit and the redox sensitivity of the PPy(DBSA) film was also studied.
    AlkuperäiskieliEi tiedossa
    Sivut3503–3509
    Sivumäärä7
    JulkaisuElectrochimica Acta
    Vuosikerta43
    Numero23
    DOI - pysyväislinkit
    TilaJulkaistu - 1998
    OKM-julkaisutyyppiA1 Julkaistu artikkeli, soviteltu

    Keywords

    • potentiometric sensor
    • soluble polypyrrole

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