Issue 3, 2005
From the journal:

Physical Chemistry Chemical Physics

Localized electrosynthesis of polypyrrole by application of short voltage pulses

Marcia T. Giacominia  and  Rolf Schuster*ab  

* Corresponding authors

a Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, Berlin, Germany

b Technical University of Darmstadt, Petersenstraβe 20, Darmstadt, Germany
E-mail: schuster@chemie.tu-darmstadt.de
Fax: +49 6151 16 4995
Tel: +49 6151 16 4925

Abstract

By the application of short voltage pulses to a tool electrode in close proximity to a substrate electrode, the electro-polymerization of pyrrole in aqueous solution was locally confined with down to micrometer precision. Depending on the pulse parameters polypyrrole towers with up to 100 μm height and about 50 μm diameter were fabricated on the substrate. The spatial confinement of the electro-polymerization reaction is explained by the local charging behavior of the double layer capacitance during voltage pulses of only 100 ns to 10 μs duration. Additionally, the 3D morphology of the polymer patterns is influenced by the diffusion of the educts and intermediate reaction products in the gap between the tool electrode and the substrate. Proper choice of the tool substrate distance and the pulse to pause ratio of the pulse trains allows the deposition of structures whose morphologies vary from fiber-like to cauliflower-like and compact.

Graphical abstract: Localized electrosynthesis of polypyrrole by application of short voltage pulses

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Article information

DOI
https://doi.org/10.1039/B411516C
Article type
Paper
Submitted
27 Jul 2004
Accepted
01 Dec 2004
First published
22 Dec 2004

Phys. Chem. Chem. Phys., 2005,7, 518-523

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Localized electrosynthesis of polypyrrole by application of short voltage pulses

M. T. Giacomini and R. Schuster, Phys. Chem. Chem. Phys., 2005, 7, 518 DOI: 10.1039/B411516C

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