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Thin films of buckminsterfullerene(C_(60)) formed by solution drop casting on Pt foil electrode surfaces were studied by cyclic voltammetry(CV) in acetonitrile(MeCN) containing quaternary ammonium or alkali-metal salts as supporting electrolyte. The electrochemical behaviors of C_(60) films are found to be strongly dependent on the nature of the supporting electrolytes, especially with tetrabutyl ammonium perchlorate (TBAP, NBu₄ClO₄), and tetrabutyl ammonium tetrafluoroborate (TBABF₄, NBu₄BF₄). Reasonably stable films are formed into which electrons can be injected. The interaction of C_(60) film with the quaternary ammonium cation may produce the fulleride salts (TBA+)(C_(60)-) and <TBA')₂(C_(60)^(2-)). The bulk electroreduction with a controlled potential to generate the soluble C_(60)^(3-) anions(dark red-brown color) is followed by electrooxidative deposition to produce a neutral C_(60) film on the surface. The peak currents(Ipc and Ipa) of these thin film were dramatically decreased with repetitive potential scanning. These results could be explained by the adsorption-desorption phenomena and ion pairing interaction of reduced species(C_(60)-, and C_(60)^(2-)) onto the electrode surface. The peak current changes and peak potential shifts of the thin C_(60) film in cyclic voltammograms formed from solution were observed by varying scan rates.
목차
Abstract
1. Introduction
2. Experimental
3. Results and Discussion
Conclusion
Acknowkedgement
References
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