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Fabrication of copper nanoparticles decorated multiwalled carbon nanotubes as a high performance electrochemical sensor for the detection of neotame
(Elsevier, 2015) Bathinapatla, Ayyappa; Kanchi, Suvardhan; Singh, Parvesh; Sabela, Myalowenkosi Innocent; Bisetty, Krishna
A highly sensitive and novel electrochemical sensor for the detection of neotame using differential pulse voltammetry with a modiﬁed glassy carbon electrode is presented. The method was further customized by the fabrication of the electrode surface with copper nanoparticles–ammonium piperidine dithiocar-bamate–mutiwalled carbon nanotubes assimilated with β-cyclodextrin. The multiwalled carbon nano-tubes assimilated with β-cyclodextrin/glassy carbon electrode exhibited catalytic activity towards the oxidation of neotame at a potential of 1.3 V at pH 3.0. The transmission electron microscopy, thermogravimetric analysis, frontier transform infrared spectroscopy and cyclic voltammetry were employed to characterize the electrochemical sensor. The sensitivity and detection limits of the electrode increased two-fold in contrast to the β-CD-MWCNTs/GCE sensor. The developed method was successfully applied for the determination of neotame in food samples, with results similar to those achieved by our modiﬁed capillary electrophoresis method with a 96% conﬁdence level.