%0 Journal Article
%T Electrical Characterization and Hydrogen Peroxide Sensing Properties of Gold/Nafion:Polypyrrole/MWCNTs Electrochemical Devices
%A Graziella Scandurra
%A Antonella Arena
%A Carmine Ciofi
%A Gaetano Saitta
%J Sensors
%D 2013
%I MDPI AG
%R 10.3390/s130303878
%X Electrochemical devices using as substrates copier grade transparency sheets are developed by using ion conducting Nafion:polypyrrole mixtures, deposited between gold bottom electrodes and upper electrodes based on Multi Walled Carbon Nanotubes (MWCNTs). The electrical properties of the Nafion:polypyrrole blends and of the gold/Nafion:polypyrrole/MWCNTs devices are investigated under dry conditions and in deionized water by means of frequency dependent impedance measurements and time domain electrical characterization. According to current-voltage measurements carried out in deionized water, the steady state current forms cycles characterized by redox peaks, the intensity and position of which reversibly change in response to H 2O 2, with a lower detection limit in the micromolar range. The sensitivity that is obtained is comparable with that of other electrochemical sensors that however, unlike our devices, require supporting electrolytes.
%K H2O2 sensor
%K MWCNTs dispersions
%K Nafion:polypyrrole
%U http://www.mdpi.com/1424-8220/13/3/3878