Core-shell hyperbranched chitosan nanostructure as a novel electrode modifier.
The present study reports, for the first time, the development and use of core-shell amino-terminated chitosan (Cs) hyperbranched nanoparticles (HBCs-NH2NPs) as a novel natural polymer-based electrode modifier for efficient electrochemical systems. The electrochemical activity of the developed HBCs-NH2NPs 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.
Nanomaterials Laboratory, Center for Materials Science, Zewail City of Science and Technology, 6th October City, 12588 Giza, Egypt.
Mohammed
M
Sedki
Nanomaterials Laboratory, Center for Materials Science, Zewail City of Science and Technology, 6th October City, 12588 Giza, Egypt.
Amr
A
Hefnawy
Nanomaterials Laboratory, Center for Materials Science, Zewail City of Science and Technology, 6th October City, 12588 Giza, Egypt,; Microanalysis Laboratory, Applied Organic Chemistry Department, National Research Centre (NRC), Dokki, 12622, Giza, Egypt.
Rabeay Y A
RY
Hassan
Nanomaterials Laboratory, Center for Materials Science, Zewail City of Science and Technology, 6th October City, 12588 Giza, Egypt,. Electronic address: ielsherbiny@zewailcity.edu.eg.
Ibrahim M
IM
El-Sherbiny
D048271:Chitosan / Q000737:chemistry*; D004553:Electric Conductivity; D004563:Electrochemistry / Q000295:instrumentation*; D004566:Electrodes; D009243:NAD / Q000737:chemistry; D049329:Nanostructures / Q000737:chemistry*; D010084:Oxidation-Reduction
D009243:NAD; D048271:Chitosan
Chemically modified electrodes; Chitosan nanoparticles; Electrochemical characterizations; Hyperbranched