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• W2020465500 abstract "This study demonstrated that redox hydrogel-modified carbon nanotube (CNT) electrodes can be developed as an amperometric sensor that are sensitive, specific and fast and do not require auxiliary enzymes. A redox polymer, poly(vinylimidazole) complexed with Os(4,4'-dimethylbpy)(2)Cl (PVI-dmeOs) was electrodeposited on Ta-supported multi-walled CNTs. The resulted PVI-dmeOs thin film did not change the surface morphology of the CNTs, but turned the CNT surface from hydrophobic to hydrophilic, as studied by scanning electron microscopy (SEM) and static water contact angle measurements. Cyclic voltammetry measurements in a Fe(CN)(6)(3-) solution and electrochemical impedance measurements in an equimolar Fe(CN)(6)(3-/4-) solution demonstrated that the PVI-dmeOs hydrogel thin film was electronic conductive with a resistance of about 15Omega. The PVI-dmeOs/CNT electrodes sensed rapidly, sensitively and specifically to model redox enzymes (glucose oxidase (GOD) and lactate oxidase (LOD)) in amperometric experiments in electrolyte solutions containing the substrates of the measured redox enzymes. Both the CNT substrate and the thin PVI-dmeOs film enhanced the sensing sensitivities. Exploration of the mechanisms suggests that the PVI-dmeOs film may enhance the sensing sensitivities by wiring the enzyme molecules through the redox centers tethered on the mobile redox polymer backbones to the CNT electrodes." @default.
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• W2020465500 date "2009-02-01" @default.
• W2020465500 modified "2023-09-27" @default.
• W2020465500 title "Modification of carbon nanotubes with redox hydrogel: Improvement of amperometric sensing sensitivity for redox enzymes" @default.
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• W2020465500 doi "https://doi.org/10.1016/j.bios.2008.09.002" @default.
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