Electrochemical studies on doping of polyacetylene
1984; Elsevier BV; Volume: 25; Issue: 8 Linguagem: Inglês
10.1016/0032-3861(84)90348-3
ISSN1873-2291
AutoresC. K. Chiang, Elmo A. Blubaugh, Wai-Sum Yap,
Tópico(s)Electrochemical sensors and biosensors
ResumoThe mechanism for electrochemical doping of polyacetylene was studied using cyclic voltammetry. The I–V curve of a thin (CH)x filme (<1 μm) electrode exhibited a redox peak with a formal redox potential of +0.65 V vs. sodium calomel electrode. Approximately 30% of the total charge that oxidized (CH)x was not reversible when held at the open circuit voltage of the cell. A more negative potential was needed to recover the remaining charge. This large charge-trapping phenomenon was the consequence of the (CH)x film being doped. Using a thick film (≳50 μm) electrode or freestanding film (∼0.1 mm) as an electrode, the I–V curve gave only a broad re-reduction peak at +0.4 V. The disappearance of the well-defined redox peak implies that the redox process revealed by the thin film data may not be the predominate mechanism for the doping process.
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