MECHANISM OF IONIC AND REDOX SENSITIVITY OF P-TYPE CONDUCTING POLYMERS .2. EXPERIMENTAL-STUDY OF POLYPYRROLE

Johan Bobacka, ZQ GAO, Ari Ivaska, Andrzej Lewenstam

Forskningsoutput: TidskriftsbidragArtikelVetenskapligPeer review

116 Citeringar (Scopus)

Sammanfattning

The potentiometric response of polypyrrole films is studied. The films are electrochemically deposited on platinum. The effects of film thickness, counter-anions and film conditioning on the response are studied. It is demonstrated that the response can vary from anionic to cationic, depending on the charge-compensating counter-anion (doping anion) incorporated during electropolymerization. Furthermore, the ionic response may be altered by redox couples in the solution, and under some conditions polypyrrole may also act as a pure redox electrode. The mixed ionic and redox sensitivities of polypyrrole are explained by considering both ion and electron transfer at the polymersolution interface. The experimental results are related to a theoretical model developed for p-type conducting polymers
OriginalspråkOdefinierat/okänt
Sidor (från-till)33–41
Antal sidor9
TidskriftJournal of Electroanalytical Chemistry
Volym368
Utgåva1-2
DOI
StatusPublicerad - 1994
MoE-publikationstypA1 Tidskriftsartikel-refererad

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