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Issue 47, 2010
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Nanostructured conducting polymer for dopamine detection

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Abstract

In this work, we demonstrate the ability of poly(N-methylpyrrole) to form nanostructures and to detect very low concentrations of dopamine, an important neurotransmitter. Poly(N-methylpyrrole) hollow particles of controlled thickness have been prepared using the layer-by-layer assembly technique and polystyrene core-shell particles as templates, which are subsequently eliminated to yield free-standing hollow microspheres with a layer thickness of 30 nm. The morphology and composition of these structures have been evaluated by scanning electron microscopy, transmission electron microscopy, FTIR, Raman and X-ray photoelectron spectroscopies. Results demonstrate that intact hollow spheres can be obtained controlling the number of polymer deposition cycles. Furthermore, two kind of sensors were constructed by immobilizing poly(N-methylpyrrole)/Au nanocomposites and poly(N-methylpyrrole) nanomembranes on the surface of a glassy carbon electrode. Electrochemical techniques were employed to evaluate the ability of poly(N-methylpyrrole) to absorb/immobilize dopamine molecules. It was found that systems based on this conducting polymer are highly sensitive to the neurotransmitter concentration, presenting a very fast response even when the concentration of the dopamine is very low.

Graphical abstract: Nanostructured conducting polymer for dopamine detection

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Article information


Submitted
07 May 2010
Accepted
30 Jul 2010
First published
24 Sep 2010

J. Mater. Chem., 2010,20, 10652-10660
Article type
Paper

Nanostructured conducting polymer for dopamine detection

M. Martí, G. Fabregat, F. Estrany, C. Alemán and E. Armelin, J. Mater. Chem., 2010, 20, 10652
DOI: 10.1039/C0JM01364A

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