Glucose nanosensors based on redox polymer/glucose oxidase modified carbon fiber nanoelectrodes.
This paper describes glucose nanosensors based on the co-electrodeposition of a poly(vinylimidazole) complex of [Os(bpy)(2)Cl](+/2+) and glucose oxidase (GOD) on a low-noise carbon fiber nanoelectrodes (CFNE). The SEM image shows that the osmium redox polymer/enzyme composite film is uniform. The film modified CFNE exhibits the classical features of a kinetically fast redox couple bound to the electrode surface. A strong and stable electrocatalytic current is observed in the presence of glucose. Under the optimal experimental conditions, the nanosensor offers a highly sensitive and rapid response to glucose at an operating potential of 0.22V. A wide linear dynamic rang of 0.01-15mM range was achieved with a detection limit of 0.004mM. Compared with the conventional gold electrode, the nanosensor possessed higher sensitivity and longer stability. Successful attempts were made in real time monitoring rabbit blood glucose levels.
Fei
Junjie
J
Department of Chemistry, Wuhan University, Wuhan 430072, P.R. China; College of Chemistry, Xiangtan University, Xiangtan, 411105, P.R. China.
Wu
Kangbing
K
Wang
Fang
F
Hu
Shengshui
S