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

A1 Journal article (refereed)

Internal Authors/Editors

Publication Details

List of Authors: Marek Sobkowiak, Tomasz Sokalski, Andrzej Lewenstam, Roger Gabrielsson, Olle Inganäs, Grzegorz Milczarek
Publication year: 2014
Journal: Electroanalysis
Volume number: 26
Issue number: 4
Start page: 739
End page: 747
eISSN: 1521-4109


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).

Last updated on 2020-27-01 at 04:43