Abstract
Simple conducting polymer–polyaniline-based sensors/biosensors, working either in potentiometric or UV/Vis spectrophotometric mode, are proposed. Disposable sensors were produced by coating polyaniline layers, cast from aqueous dispersion of the polymer nanoparticles, on a transparent plastic polyacetate foil. In the potentiometric mode, polyaniline layers are sensitive to a number of metal cations, while in UV/Vis mode, changes of absorbance were recorded only in case of a chemical reaction of cations with the polymer. Pronounced sensitivity of tested sensors to ammonia was used for potentiometric/spectrophotometric biosensing purposes studied on a model example of urease-based sensors of urea. The highest sensitivity and reproducibility of such sensors were observed in urea concentration ranging from 1 to 10 mM.
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A financial support from scientific research funds (Poland) within the research project N204 242234 for years 2008–2011 is gratefully acknowledged.
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Malinowski, P., Grzegrzółka, I., Michalska, A. et al. Dual potentiometric and UV/Vis spectrophotometric disposable sensors with dispersion cast polyaniline. J Solid State Electrochem 14, 2027–2037 (2010). https://doi.org/10.1007/s10008-010-1073-1
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DOI: https://doi.org/10.1007/s10008-010-1073-1