Core-shell hyperbranched chitosan nanostructure as a novel electrode modifier
By Mohammed Sedki and Amr Hefnawy and Rabeay Y.A. Hassan and Ibrahim M. El-Sherbiny
Published in International Journal of Biological Macromolecules
NULL
2016
Abstract
The present study reports, for the first time, the development and use of core-shell amino-terminated chitosan (Cs) hyperbranched nanoparticles (HBCs-NH2 NPs) as a novel natural polymer-based electrode modifier for efficient electrochemical systems. The electrochemical activity of the developed HBCs-NH2 \NPs\ as compared to Cs \NPs\ was identified by standard oxidation-reduction reactions of ferricyanide. The oxidation-reduction peaks height was about twofold higher than the response of Cs-modified electrode. On the other hand, \NADH\ oxidation at the nanostructured surfaces confirmed the electrocatalytic activity where the oxidation of \NADH\ appeared at a lower overpotential (from 805 mV to 635 mV vs Ag/AgCl). Eventually, a diffusion-controlled process was confirmed from the scan rate effect.
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