Polymerized ionic liquid-wrapped carbon nanotubes: the promising composites for direct electrochemistry and biosensing of redox protein.
Polymerized ionic liquid-wrapped carbon nanotubes: the promising composites for direct electrochemistry and biosensing of redox protein.
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DOI：
10.1016/j.talanta.2009.10.012
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发表时间：
2010-03
期刊：
影响因子：
6.1
通讯作者：
Chunhui Xiao;X. Chu;Bohua Wu;H. Pang;Xiaohua Zhang;Jinhua Chen
中科院分区：
文献类型：
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作者：
Chunhui Xiao;X. Chu;Bohua Wu;H. Pang;Xiaohua Zhang;Jinhua Chen
聚合离子液体包裹的碳纳米管（PIL-CNT）首先被设计用于氧化还原蛋白的直接电化学和生物传感。经透射电子显微镜（TEM）、热重分析（TGA）和傅里叶变换红外（FT-IR）光谱验证，碳纳米管成功涂覆了聚合离子液体（PIL）层。与原始CNT以及IL单体和CNT的混合物相比，PIL-CNT在水中分散得更好，并且对O2和H2O2表现出优异的电催化作用。以葡萄糖氧化酶（GOD）作为蛋白质模型，在PIL-CNTs修饰的玻碳（GC）电极上研究了氧化还原蛋白的直接电化学，观察到GOD分子优异的直接电化学性能。所提出的生物传感器（GOD/PIL-CNTs/GC电极）对葡萄糖表现出良好的分析性能，线性响应高达6mM，响应灵敏度为0.853μAmM−1，稳定性和选择性良好。
Polymerized ionic liquid-wrapped carbon nanotubes (PIL-CNTs) were firstly designed for direct electrochemistry and biosensing of redox proteins. The CNTs were coated successfully with polymerized ionic liquid (PIL) layer, as verified by transmission electron microscopy (TEM), thermogravimetric analysis (TGA) and Fourier transform infrared (FT-IR) spectroscopy. The PIL-CNTs were dispersed better in water and showed superior electrocatalysis toward O2and H2O2comparing to pristine CNTs and the mixture of IL monomer and CNTs. With glucose oxidase (GOD) as a protein model, the direct electrochemistry of the redox protein was investigated on the PIL-CNTs modified glassy carbon (GC) electrode and excellent direct electrochemical performance of GOD molecules was observed. The proposed biosensor (GOD/PIL-CNTs/GC electrode) displayed good analytical performance for glucose with linear response up to 6mM, response sensitivity of 0.853μAmM−1, good stability and selectivity.