Influence of the activation growth methods and electric potential sweep rate on the morphology and electrical properties of polyaniline films

  • Vanesa Alzate Restrepo Universidad Nacional de Colombia
  • Diego Andrés Vasco Calle Universidad Nacional de Colombia https://orcid.org/0000-0001-7456-4683
  • Javier González Ocampo Universidad Nacional de Colombia
Keywords: Polyaniline, conductive polymers, electropolymerization, morphology, electrical properties

Abstract

The effect of the potential sweep rate and some growth activation methods on the morphology and conductivity of electropolymerized polyaniline was evaluated; these properties were studied via scanning electron microscopy (SEM) and faradaic impedance. At potential sweep rates higher than150 mV/s the films suffered important changes on their growth voltamograms and on their morphological properties. As concerns the growth activation methods, it was found that the potentiostatic step and broader potential scans form open morphology films, while those activated with a slower scan showed a compact morphology. It was found a close relationship between morphology, capacitance and conductivity. Also, films with branched structure showed higher conductivity and capacitance.

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Author Biographies

Vanesa Alzate Restrepo, Universidad Nacional de Colombia

Escuela de Procesos y Energía

Diego Andrés Vasco Calle, Universidad Nacional de Colombia

Escuela de Procesos y Energía

Javier González Ocampo, Universidad Nacional de Colombia

Escuela de Procesos y Energía

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Published
2005-07-23
How to Cite
Alzate Restrepo V., Vasco Calle D. A., & González Ocampo J. (2005). Influence of the activation growth methods and electric potential sweep rate on the morphology and electrical properties of polyaniline films. Revista Facultad De Ingeniería Universidad De Antioquia, (34), 9-22. Retrieved from https://revistas.udea.edu.co/index.php/ingenieria/article/view/343144