Durable PEDOT:PSS films obtained from modified water-based inks for electrochemical sensors

Michal Wagner, Grzegorz Lisak, Ari Ivaska, Johan Bobacka

    Research output: Contribution to journalArticleScientificpeer-review

    36 Citations (Scopus)

    Abstract

    Printing of conducting polymer films from water-based inks is a powerful method that can facilitate the fabrication of various types of electrochemical sensors. This paper reports on the use of ethylene glycol and quaternary ammonium salts as additives to water-based poly(3,4-ethylenedioxythiophene) poly(styrenesulfonate) (PEDOT:PSS) inks in order to obtain conducting polymer films with improved adhesion to a carbon-based electrode substrate in aqueous environment. The modified PEDOT:PSS films deposited on glassy carbon were studied in aqueous solutions by cyclic voltammetry, electrochemical impedance spectroscopy, and potentiometry. It was found that PEDOT:PSS films modified with ethylene glycol and quaternary ammonium salts exhibit excellent adhesion to glassy carbon even after immersion in aqueous solutions for more than two months. The modified PEDOT:PSS films were electroactive, showed relatively fast ion transport properties, and were successfully applied as solid-contact material in lead(II)-selective electrodes.
    Original languageUndefined/Unknown
    Pages (from-to)694–701
    Number of pages8
    JournalSensors and Actuators B: Chemical
    Volume181
    DOIs
    Publication statusPublished - 2013
    MoE publication typeA1 Journal article-refereed

    Keywords

    • Adhesion
    • Chemical sensor
    • Conducting polymer ink
    • Ion crosslinking
    • PEDOT:PSS

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