Electrochromism and Swelling of Polypyrrole Membranes: An Electrochemical and Ellipsometric Study

The growth of polypyrrole (Ppy) layers on gold electrodes in nearly neutral pH solutions is analysed using “in situ” voltametric and ellipsometric techniques. Different film structures are obtained depending on the potentiodynamic programme and the composition of the electrolyte. More compact dodecy...

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Autores principales: Zerbino, Jorge Omar, Sustersic, M. G., Falivene, Claudio, Avaca, N. E., Maltz, Alberto Leonardo
Formato: Articulo
Lenguaje:Inglés
Publicado: 2011
Materias:
Química
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/124343
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-124343
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Química
spellingShingle Química
Zerbino, Jorge Omar
Sustersic, M. G.
Falivene, Claudio
Avaca, N. E.
Maltz, Alberto Leonardo
Electrochromism and Swelling of Polypyrrole Membranes: An Electrochemical and Ellipsometric Study
topic_facet Química
description The growth of polypyrrole (Ppy) layers on gold electrodes in nearly neutral pH solutions is analysed using “in situ” voltametric and ellipsometric techniques. Different film structures are obtained depending on the potentiodynamic programme and the composition of the electrolyte. More compact dodecylsulphate-(DS) doped Ppy layers were grown at 1.2 V versus RHE than those obtained by applying a higher potential. The more compact layers correspond to the growth of an oxidised Ppy/DS layer that shows low pseudo capacity behaviour. After dipping, the doped Ppy/DS film in KCl solution-significant variations in optical indices and thickness are detected as a function of the applied potential. Higher electrochromism as well as decrease in film thickness after cathodisation is achieved. The optical indices and the thickness of the Ppy layer formed under different applied potential/time programmes are estimated.
format Articulo
Articulo
author Zerbino, Jorge Omar
Sustersic, M. G.
Falivene, Claudio
Avaca, N. E.
Maltz, Alberto Leonardo
author_facet Zerbino, Jorge Omar
Sustersic, M. G.
Falivene, Claudio
Avaca, N. E.
Maltz, Alberto Leonardo
author_sort Zerbino, Jorge Omar
title Electrochromism and Swelling of Polypyrrole Membranes: An Electrochemical and Ellipsometric Study
title_short Electrochromism and Swelling of Polypyrrole Membranes: An Electrochemical and Ellipsometric Study
title_full Electrochromism and Swelling of Polypyrrole Membranes: An Electrochemical and Ellipsometric Study
title_fullStr Electrochromism and Swelling of Polypyrrole Membranes: An Electrochemical and Ellipsometric Study
title_full_unstemmed Electrochromism and Swelling of Polypyrrole Membranes: An Electrochemical and Ellipsometric Study
title_sort electrochromism and swelling of polypyrrole membranes: an electrochemical and ellipsometric study
publishDate 2011
url http://sedici.unlp.edu.ar/handle/10915/124343
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