Electrochemical impedance spectroscopy of poly[carbazole-co-N-p-tolylsulfonyl pyrrole] on carbon fiber microelectrodes, equivalent circuits for modelling
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Dosyalar
Tarih
2009
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Elsevier Science Sa
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
Polycarbazole (PCz) and copolymerization of carbazole (Cz) and N-p-tolylsulfonyl pyrrole (pTsp), P(Cz-co-pTsp), thin films have been cyclovoltammetrically coated onto carbon fiber electrodes as an active functionalized microelectrode in sodium perchlorate (NaClO4)/acetonitrile (ACN) medium. The resulting thin films of homopolymer and copolymer were characterised by using Fourier transform infrared reflectance spectroscopy (ATR-FTIR), energy dispersive X-ray (EDX) point analysis, scanning electron microscopy (SEM) and atomic force microscopy (AFM). An electrical impedance study on the prepared electrodes is reported in the present paper under different feed ratios of [pTsp](0)/[Cz](0) during electrochemical impedance spectroscopic (EIS) measurements. Specific capacitance (C,,,) were calculated, P(Cz-co-pTsp) in feed ratio of [pTsp](0)/[Cz](0) = 200 has preserved more capacitive behavior especially at lower frequency (C-sp = similar to 156 mF g(-1)) than polycarbazole (C-sp = similar to 2.1 mF g(-1). The electrochemical impedance data fitted to three different equivalent models were used to find Out numerical values of the proposed components. (C) 2008 Elsevier B.V. All rights reserved.
Açıklama
Anahtar Kelimeler
Poly(carbazole-co-p-tolylsulfonyl pyrrole), Microelectrodes, Electrochemical impedance spectroscopy, Charge-Transport, Thin-Films, Polycarbazole, Carbazole, Energy, Behavior, Pyrrole)
Kaynak
Progress in Organic Coatings
WoS Q Değeri
Q2
Scopus Q Değeri
Q1
Cilt
65
Sayı
2
