Cadmium Selenide Quantum Dots - MWCNTs Nanocomposite Modified Electrode for the Determination of Epinephrine

Arumugam Kalaivani; Sangilimuthu Sriman Narayanan

doi:10.4028/www.scientific.net/AMR.938.176

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Cadmium Selenide Quantum Dots - MWCNTs Nanocomposite Modified Electrode for the Determination of Epinephrine

Abstract:

A novel Cadmium selenide Quantum dots MWCNTs nanocomposite modified electrode was achieved by simple drop casting method and its application towards the quantitative determination of epinephrine. The Cadmium selenide Quantum Dots was characterized by transmission electron microscopy and MWCNT was characterized by scanning electron microscopy. The electrochemical characteristics of the modified electrode were studied using cyclic voltammetry. The voltammetric response of the modified electrode was higher than that of the MWCNT and bare electrodes. The modified electrode exhibits excellent electrocatalytic activity towards the oxidation of epinephrine by enhancing its oxidation current in 0.1M phosphate buffer solution. The determination range of epinephrine is from 0.16 μM to 14 μM and the detection limit was 0.05 μM (S/N = 3). The proposed modified electrode exhibited good stability and reproducibility.