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首页> 外文期刊>Electroanalysis >Application of Tetrathiafulvalene-Modified Carbon Nanotubes to Preparation of Integrated Mediating System for Bioelectrocatalytic Oxidation of Glucose
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Application of Tetrathiafulvalene-Modified Carbon Nanotubes to Preparation of Integrated Mediating System for Bioelectrocatalytic Oxidation of Glucose

机译：四硫磷富瓦烯修饰的碳纳米管在葡萄糖生物电催化氧化综合介体体系制备中的应用

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摘要

Multiwalled carbon nanotubes (CNTs), that are modified with ultrathin layers of tetrathiafulvalene (TTF), were demonstrated to form a stable colloidal suspension. Such dispersion was exploited to fabricate an integrated mediating system (utilizing both highly conductive carbon nanostructures, CNTs, and a redox mediator, TTF) capable of facilitating electron transfers between the active sites of the enzyme (glucose oxidase) and the electrode surface. The resulting bioelectrocatalytic system produced sizeable glucose oxidation currents in phosphate buffer solution (pH 7.0). For comparison, the system utilizing TTF-free (bare) CNTs and the glucose oxidase enzyme showed relatively much lower activity towards the glucose oxidation. Formation, electrocatalytic reactivity. durability, and morphology of proposed bioelectrocatalytic systems were examined using cyclic voltammetry, potential step techniques, rotating disk voltammetry and transmission electron microscopy. The whole concept of the preparation of CNT-supported redox mediating systems is of potential utility to bioelectroanalytical chemistry.
机译：用四硫富瓦烯（TTF）的超薄层改性的多壁碳纳米管（CNT）被证明可以形成稳定的胶体悬浮液。利用这种分散体来制造能够促进酶（葡萄糖氧化酶）的活性位点和电极表面之间的电子转移的集成介导系统（利用高导电性碳纳米结构CNT和氧化还原介体TTF）。所得的生物电催化系统在磷酸盐缓冲溶液（pH 7.0）中产生了可观的葡萄糖氧化电流。为了比较，利用无TTF（裸）CNT和葡萄糖氧化酶的系统显示出相对低得多的针对葡萄糖氧化的活性。形成，电催化反应。使用循环伏安法，电位阶跃技术，旋转盘伏安法和透射电子显微镜检查了所提出的生物电催化系统的耐久性和形态。碳纳米管支持的氧化还原介导体系的制备的整个概念对生物电分析化学具有潜在的实用性。

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