Morphological and impedance studies on electropolymerized 3,4-(2,2-dibenzylpropylenedioxy)thiophene nanostructures on micron sized single carbon fiber |
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Authors: | A. Sezai Sarac S. Esra Ozgul Asli Gencturk Burkhard Schulz Hans-Detlev Gilsing Heike Faltz |
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Affiliation: | 1. Department of Chemistry & Polymer Science and Technology, Istanbul Technical University, Maslak, 34469, Istanbul, Turkey;2. University of Potsdam, Institute of Physics und Astronomy, Karl-Liebknecht-Straße 24/25, D-14476 Potsdam, Germany;3. Institute of Thin Film and Microsensoric Technologies Teltow (IDM), Kantstraße 55, D-14513 Teltow, Germany |
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Abstract: | Micron sized single carbon fibers were cyclovoltammetrically coated with poly[3,4-(2,2-dibenzylpropylenedioxy)thiophene] resulting in a nanofiber network at the surface. The method provides conjugated polymer nanostructures covalently and uniformly bound to micron sized substrates. When the electropolymerization is carried out with different electrolytes in acetonitrile the dopant influences the structure of the coating layer what is proved by electrochemical impedance spectroscopy and electron microscopy. Electrodes based on poly[3,4-(2,2-dibenzylpropylenedioxy)thiophene] on single carbon fiber microelectrodes (SCFMEs) prepared in Bu4NPF6/ACN show the best capacitance performance due to their higher surface area. The improvement is attributed to the formed nanofiber network structure which results in a more efficient charge transport and collection. |
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Keywords: | Conductive polymer nanostructures Electrochemical impedance spectroscopy Scanning electron microscopy Electropolymerization Single carbon fiber microelectrode |
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