葡萄糖氧化酶
纳米片
Nafion公司
生物传感器
电极
电催化剂
电化学
石墨
材料科学
生物电子学
电子转移
化学工程
碳纳米管
复合数
纳米技术
无机化学
化学
有机化学
复合材料
物理化学
工程类
作者
Chenglin Fu,Wensheng Yang,Xu Chen,David G. Evans
标识
DOI:10.1016/j.elecom.2009.02.042
摘要
The direct electrochemistry of glucose oxidase (GOD) immobilized in a modified electrode based on a composite film of exfoliated graphite nanosheets (GNSs) and Nafion has been investigated for the first time. Direct electron communication between GOD and the electrode was achieved with a fast electron transfer rate (12.6 s−1). In addition, the bioactivity of GOD was retained after immobilization in the composite film and glucose could be determined based on the decrease of the electrocatalytic response of the reduced form of GOD to dissolved oxygen. The resulting biosensor exhibited higher sensitivity (3.4 μA mM−1). Considering much lower cost of GNSs and ready preparation from graphite, the GNSs-based modified electrode described here is superior to the carbon nanotubes (CNTs)-based modified electrodes and should have wide applications in third-generation biosensors, bioelectronics and electrocatalysis.
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