Abstract
ABSTRACTWe report on the electrochemical properties of ultra long aligned multiwalled carbon nanotube (MWNT) bundles synthesized using water-assisted chemical vapor deposition process. Cyclic voltammogram with diffusion-controlled-reversible reaction obtained at MWNT electrodes in 10 mM K3(Fe(CN)6) /0.1 M KCl solution with varying scan rates indicates that radial diffusion mass transport is dominant at these electrodes. We further show that these electrodes can detect very low concentrations of ascorbic acid (AA) and dopamine (DA) (0.7 μM for AA and 1.87 μM for DA ). The excellent electrochemical properties along with nice performance for single species detection suggest that these MWNTs are promising electrode materials for developing high sensitive chemical and/or biological sensors.
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