Publication details

ELECTROCHEMICAL PROPERTIES OF CNT'S MODIFIED MICROELECTRODES

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Authors

PRASEK Jan PEKAREK Jan JAŠEK Ondřej HRDY Radim BUSINOVA Petra CHOMOUCKA Jana DRBOHLAVOVA Jana GAJDOS Libor HUBALEK Jaromír

Year of publication 2011
Type Article in Proceedings
Conference NANOCON 2011
MU Faculty or unit

Faculty of Science

Citation
web http://konsys-t.tanger.cz/files/proceedings/nanocon_11/lists/papers/1315.pdf
Keywords sensor; electrode; carbon nanotubes; MWCNTs; thermal CVD; growth
Description This paper deals with the problematic of microsensors for electrochemical detection of species in aqueous solutions, where the main problem is reduction of geometrical size of the electrodes in comparison to standard electrodes resulting in lower current response. In this paper there was fabricated thin film substrate of working microelectrode on silicon substrate. Direct grown deposition of multiwalled carbon nanotubes (MWCNTs) over microelectrode substrate was done using thermal CVD to increase the active size of the electrode. Electrode surface was characterized optically using scanning electron microscopy resulting in relative good and homogenous surface. Then the electrode was tested as a working electrode of three-electrode electrochemical system against standard reference and auxiliary electrode. Heavy metal ions of lead were used as analysed species for electrochemical properties characterization using differential pulse voltammetry and compared to commercial carbon based working electrode. Obtained results confirmed our presumption that direct grown MWCNTs based working electrode could be used for electrochemical analysis. The main advantage of this solution is in future possibilities of MWCNTs functionalization for bioanalysis of proteins, thiols, etc.
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