ELECTROCHEMICAL-BEHAVIOR OF POLYPYRROLE FILM POLYMERIZED IN INDIGO CARMINE SOLUTION

A1 Originalartikel i en vetenskaplig tidskrift (referentgranskad)


Interna författare/redaktörer


Publikationens författare: GAO Z, BOBACKA J, LEWENSTAM A, IVASKA A
Förläggare: PERGAMON-ELSEVIER SCIENCE LTD
Publiceringsår: 1994
Tidskrift: Electrochimica Acta
Tidskriftsakronym: ELECTROCHIM ACTA
Volym: 39
Nummer: 5
Artikelns första sida, sidnummer: 755
Artikelns sista sida, sidnummer: 762
Antal sidor: 8
ISSN: 0013-4686


Abstrakt

Electrochemical studies have been conducted to characterize polypyrrole film prepared in indigo carmine solution, PPy(IC). The PPy(IC) film was found to be formed via an adsorbed layer of IC on the substrate electrode surface. No obvious nucleation process was observed during the film deposition. The electrochemical processes of PPy(IC) are mediated by the entrapped IC in the film. It was found that the redox potential of the PPy(IC) film is dependent on the pH of the solution in the pH range of 0-9, and a stable cyclic voltammogram was obtained at pH values lower than 7. In an alkaline medium, however, the film loses its redox response quickly upon potential cycling resulting in a cation permselective membrane. The PPy(IC) membrane with the bulky and multi-charged dopant was found to have cationic sensitivity but the film was nevertheless rather non-selective to cations.


Nyckelord

INDIGO CARMINE, POLYMERIZATION, VOLTAMMETRY

Senast uppdaterad 2019-10-12 vid 04:06