Electrostatically immobilized hexacyanoferrate ions as redox mediators in biochemical sensing: controlled release and cyclic voltammetric behavior

Harak, Dale W.; Mottola, Horacio A.

doi:10.1016/0956-5663(91)80024-r

Cited by 3 publications

(1 citation statement)

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“…Therefore electron mediators other than oxygen for glucose oxidase are required to establish an electric connection between the redox center of enzyme and the electrode. Many mediators have been employed previously including hexacyanoferrate(III), [6][7][8] organic dyes, [9][10][11] Ru-complexes, 12 Os-complexes, [13][14][15] and other electrochemically active substrates. 16 Among the mediators, ferrocene (Fc) and its derivatives 17,18 were shown to be efficient electron acceptors in their oxidized ferricinium ion forms for soluble glucose oxidase.…”

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confidence: 99%

Improvement of amperometric glucose biosensor by the immobilization of FcCD inclusive complex and carbon nanotube

Zheng

et al. 2010

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A novel glucose biosensor was constructed by using ferrocene-carbonyl-beta-cyclodextrin (FcCD) inclusive complex as electron-transfer mediator and carbon nanotubes (CNTs) as electron-transfer promoter. FcCD inclusive complex and glucose oxidase (GOx) were covalently bonded to CNTs by poly-l-lysine (PLL) to fabricate a glucose biosensor. The electrocatalytic oxidation of glucose at the biosensor occurred at low potential below 200 mV, avoiding the interference of the main interfering substances in real samples containing a 5-times higher concentration of l-cysteine, ascorbic acid, and uric acid. The biosensor showed fast response for glucose. A broad linear range of glucose concentration from 1.0 x 10(-5) to 2.90 x 10(-3) M was obtained and the detection limit was 2.2 x 10(-6) M.

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