The self-assembly, characterization and application of hemoglobin immobilized on Fe3O4@Pt core-shell nanoparticles |
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Authors: | Hong Fan Zhong-Qin Pan Hai-Ying Gu |
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Affiliation: | 1. Institute of Analytical Chemistry for Life Science, School of Public Health, Nantong University, Nantong, 226007, People’s Republic of China
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Abstract: | Direct electron transfer is demonstrated to occur between an electrode and hemoglobin that was immobilized on a film of Fe3O4@Pt-chitosan (Fe3O4@Pt-CS). Magnetic nanoparticles composed of Fe3O4 were prepared by a chemical coprecipitation method, and platinum nanoparticles were deposited on the Fe3O4 surface to form novel core-shell nanocomposites. In phosphate buffer solution of pH 7.0, the hemoglobin-Fe3O4@Pt-CS assembly on a modified glassy carbon electrode exhibited a couple of well-defined and quasi-reversible redox peaks. The formal potential E0′ was about ?0.35 V. The electrode displayed excellent electrocatalytic activity towards oxygen and hydrogen peroxide reduction without the need for an electron mediator. |
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