Anionic responses of electrochemically synthesized polypyrrole films.
Conducting polypyrrole films with thickness of about 8 mum were prepared on platinum by continuous scanning in 0.1M pyrrole and 0.1M electrolyte (LiCl, LiBF(4) or NaBF(4)). Scan-rates of 10, 20 and 50 mV/sec with scan-times of 30, 45 and 60 min were used. The potentiometric response of the films was tested over a range of anions. Films were found to be anion-sensitive but very non-selective. The influence of the doping cation was also investigated.
Cadogan
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Laboratory of Analytical Chemistry, Abo Akademi University, SF-20500 Turku-Abo, Finland.
Lewenstam
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Ivaska
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