Electrochemistry and ion sensing properties of conducting hydrogel layers based on polypyrrole and alkoxysulfonated poly(3,4-ethylenedioxythiophene) (PEDOT-S)

Marek Sobkowiak, Tomasz Sokalski, Andrzej Lewenstam, Roger Gabrielsson, Olle Inganäs, Grzegorz Milczarek

    Research output: Contribution to journalArticleScientificpeer-review

    1 Citation (Scopus)


    Acidic aqueous solutions containing pyrrole and alkoxysulfonated PEDOT derivative (PEDOT-S) were found to undergo polymerization in the absence of an external oxidizing agent. The product was a nearly black-colored conducting hydrogel that after separation could be dispersed in water or acetone. The suspensions could be used to deposit cast films on a polycrystalline gold electrode. The polymer modified electrode showed a nearly Nernstian potentiometric response to Ag+ cations in the concentration range of 10−5–10−1 M with the slope of 54 mV/decade. The response was specific to Ag+ compared to a series of alkali and transition-metal cations (pKAg/M>3.7).
    Original languageUndefined/Unknown
    Pages (from-to)739–747
    Issue number4
    Publication statusPublished - 2014
    MoE publication typeA1 Journal article-refereed

    Cite this