Electrochemical characteristics of facile prepared carbon nanotubes-ionic liquid gel modified microelectrode and application in bioelectrochemistry
Electrochemical characteristics of facile prepared carbon nanotubes-ionic liquid gel modified microelectrode and application in bioelectrochemistry
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简易制备碳纳米管-离子液体凝胶修饰微电极的电化学特性及其在生物电化学中的应用
DOI：
10.1016/j.elecom.2006.06.024
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发表时间：
2006-09-01
影响因子：
5.4
通讯作者：
Dong, Shaojun
中科院分区：
文献类型：
--
作者：
Liu, Ying;Zou, Xiangqin;Dong, Shaojun
将碳纳米管（CNTs）-室温离子液体（IL）凝胶修饰在碳纤维微电极（CFME）上，制备了CNTs基微电极（ME），其循环伏安曲线为S形，具有良好的稳定性、高电导率、电流响应大、尺寸可调等特点。葡萄糖氧化酶的直接电子转移被大大促进，即使在高扫描速率下也表现出可逆的电化学行为。此外，碳纳米管微电解液对生物分子如多巴胺（DA）、抗坏血酸（AA）和二氢烟酰胺腺嘌呤二核苷酸也表现出有效的电催化氧化能力。DA和AA的氧化峰电位明显分离，使在AA存在下选择性测定DA成为可能。这些现象表明，基于碳纳米管的微电极具有很好的潜力，在体内和体外检测各种物种。(c)2006 Elsevier B. V.保留所有权利。
The carbon nanotubes (CNTs) based microelectrode (ME) by modifying CNTs-room temperature ionic liquid (IL) gel at carbon fiber microelectrode (CFME) is easily prepared, which exhibits the typical cyclic voltammogram of ME with sigmoid shape and possesses good stability, high conductivity and enlarged current response and tunable dimension. The direct electron transfer of glucose oxidase has been greatly promoted showing reversible electrochemical behavior even at high scan rate. In addition, the CNTs based ME also exhibits effectively electrocatalytic oxidized ability to biomolecules, e.g. dopamine (DA), ascorbic acid (AA) and dihydronicotinamide adenine dinucleotide. The obvious separation of oxidized peak potential for DA and AA makes it possible to selectively determine DA in presence of AA. These phenomena show that the CNTs based ME has promising potential to detect various species in vivo and in vitro. (c) 2006 Elsevier B.V. All rights reserved.