Comparison of multi-walled carbon nanotubes and poly(3-octylthiophene) as ion-to-electron transducers in all-solid-state potassium ion-selective electrodes

A1 Journal article (refereed)


Internal Authors/Editors


Publication Details

List of Authors: Zekra Mousavi, Agnieszka Teter, Andrzej Lewenstam, Magdalena Maj-Zurawska, Ari Ivaska, Johan Bobacka
Publisher: WILEY-BLACKWELL
Publication year: 2011
Journal: Electroanalysis
Journal acronym: ELECTROANAL
Volume number: 23
Issue number: 6
Start page: 1352
End page: 1358
Number of pages: 7
ISSN: 1040-0397
eISSN: 1521-4109


Abstract

Multi-walled carbon nanotubes (MWCNTs) were compared with poly(3-octylthiophene) (POT) as ion-to-electron transducer in all-solid-state potassium ion-selective electrodes with valinomycin-based ion-selective membranes. MWCNTs and POT were mixed with the other components of the potassium ion-selective membrane cocktail (valinomycin, KTpClPB, o-NPOE, PVC, THF) which was then applied on a glassy carbon (GC) substrate to prepare single-piece ion-selective electrodes (SPISEs). Results from potentiometric and impedance measurements showed that the MWCNT-based electrodes have a more reproducuible standard potential and a lower overall impedance than the electrodes based on POT. Both types of electrodes showed similar sensitivity to potassium ions and no redox sensitivity.


Keywords

All-solid-state potassium-selective electrodes, Impedance spectroscopy, Multi-walled carbon nanotubes, Poly(3-octylthiophene), Potentiometry

Last updated on 2020-01-04 at 04:12