ELECTROCHEMICAL PROPERTIES OF CNT'S MODIFIED MICROELECTRODES

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Publikace nespadá pod Ekonomicko-správní fakultu, ale pod Přírodovědeckou fakultu. Oficiální stránka publikace je na webu muni.cz.
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PRASEK Jan PEKAREK Jan JAŠEK Ondřej HRDY Radim BUSINOVA Petra CHOMOUCKA Jana DRBOHLAVOVA Jana GAJDOS Libor HUBALEK Jaromír

Rok publikování 2011
Druh Článek ve sborníku
Konference NANOCON 2011
Fakulta / Pracoviště MU

Přírodovědecká fakulta

Citace
www http://konsys-t.tanger.cz/files/proceedings/nanocon_11/lists/papers/1315.pdf
Klíčová slova sensor; electrode; carbon nanotubes; MWCNTs; thermal CVD; growth
Popis 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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