Nanosensing Platform for the Electrochemical Determination of Dopamine

Abstract

Disposable, selective and low cost carbon nanotubes modified electrodes were fabricated for the electrochemical detection of dopamine (DA). An almost 4-fold increase in the dopamine oxidation signal was obtained by using single walled carbon nanotubes modified pencil graphite electrodes (SWCNTs−PGE) compared to unmodified electrodes. The selectivity of the electrodes was checked in the presence of uric acid (UA) and ascorbic acid (AA). SWCNTs−PGE exhibited high selectivity even in the ternary mixture that contained DA, AA and UA and two different binary mixtures, one containing DA and AA and the other DA and UA.