Sedki M, Hefnawy A, Hassan RYA, El-Sherbiny IM. Core-shell hyperbranched chitosan nanostructure as a novel electrode modifier.
Int J Biol Macromol 2016;
93:543-546. [PMID:
27612643 DOI:
10.1016/j.ijbiomac.2016.09.016]
[Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2016] [Revised: 08/11/2016] [Accepted: 09/05/2016] [Indexed: 01/05/2023]
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 805mV to 635mV vs Ag/AgCl). Eventually, a diffusion-controlled process was confirmed from the scan rate effect.
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