Journal
SYNTHETIC METALS
Volume 158, Issue 11, Pages 453-461Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.synthmet.2008.03.010
Keywords
polypyrrole; electrochemical oxidation; polymer-modified electrodes; scanning electron microscopy; atomic force microscopy; pH sensors
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Electrochemical and morphological characteristics of polypyrrole (PPy) films electro-deposited from three different electrolyte solutions (acetonitrile, water and acetonitrile + water) have been investigated using atomic force microscopy and scanning electron microscopy. Experimental parameters including the electrolyte and the deposition time were shown to affect the morphologies of polypyrrole films. After characterization of the polypyrrole film morphologies, these polymer films were successfully tested as sensitive layers in pH sensors since the pH sensor responses were fast, linear and sensitive to pH changes. More, these responses of the pH sensors were dependent on the experimental conditions of the electro-deposition (thickness and solvent). (C) 2008 Elsevier B.V. All rights reserved.
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