Journal
ANALYTICAL SCIENCES
Volume 33, Issue 7, Pages 845-851Publisher
SPRINGERNATURE
DOI: 10.2116/analsci.33.845
Keywords
Amperometry; pseudo-steady-state current; microband electrode; bioelectrocatalysis; glucose sensor; FAD-dependent glucose dehydrogenase
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We performed numerical simulations on an extremely fast, mediated, electron transfer-type bioelectrocatalytic reaction using a microband electrode. The simulations under fast-enzyme-kinetics conditions predicted that the decrement of the current density by increaseing the microband thickness would effectively improve the upper limit of detection. These predictions were accurate for an ultrathin-ring with thickness of 100 nm and gold leaf with thickness of 10 mu m electrodes, acting as novel amperometric glucose sensors with FAD-dependent glucose dehydrogenase. The gold leaf electrode provided pseudo-steady-state currents which were proportional to the glucose concentration up to a concentration of 20 times higher than the mediator concentration.
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