葡萄糖氧化酶
聚电解质
电极
安培法
材料科学
循环伏安法
电子转移
石墨烯
生物传感器
化学工程
电化学
无机化学
纳米技术
化学
聚合物
有机化学
复合材料
物理化学
工程类
作者
Zhiping Jiang,Yonggang Shangguan,Qiang Zheng
出处
期刊:Polymers
[MDPI AG]
日期:2019-03-22
卷期号:11 (3): 551-551
被引量:13
标识
DOI:10.3390/polym11030551
摘要
A polyelectrolyte film-coated electrode for the quantitative detection of glucose was reported. Carbon nanotubes, graphene oxide and polyelectrolyte with a ferrocenyl group were used to modify an enzyme electrode to facilitate the electron transfer between glucose oxidase and the electrode. Cyclic voltammetry and amperometric methods were adopted to investigate the effects of different polyelectrolytes and carbon nanomaterials on the electrochemical properties of enzyme electrodes. The results indicate that the ferrocenyl groups on a polyelectrolyte skeleton act as a mediator between the redox center of glucose oxidase and the electrode, which efficiently enhances the electron transfer between a glassy carbon electrode and glucose oxidase. The calibration curve of the sensor shows a linear range from 0.2 to 5 mM for glucose response. The sensor can achieve 95% of the steady-state current within 10 s. The electrodes also present high operational stability and long-term storage stability.
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