Abstract
Polypyrrole (pPy) thin films were synthesized electrochemically by a pulse method on platinum electrodes in N-butyl-N-methyl-pyrrolidinium bis(trifluoromethanesulfonyl)imide ionic liquid (PYR14TFSI). The pulse deposition method allowed the synthesis of well adherent pPy layers on Pt that are attractive for the realization of sensors and biosensors because of their good selectivity with respect to the most common interferents. The EIS (Electrochemical Impedance Spectroscopy) response to hydrogen peroxide and biological interferents indicated pPy as a highly sensitive electrochemical platform for the impedimetric sensing of H2O2. The polymer was overoxidated (opPy) before the characterization to prevent its electrochemical contribution when working in aqueous solution. opPy was then functionalized by glucose oxidase enzyme and the device so assembled was tested as a impedimetric biosensor. This technique showed to have great chances to substitute classic detection methods.
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