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首页> 外文期刊>Electroanalysis >Glassy carbon electrodes modified with multiwall carbon nanotubes dispersed in polylysine
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Glassy carbon electrodes modified with multiwall carbon nanotubes dispersed in polylysine

机译：用分散在赖氨酸中的多壁碳纳米管修饰的玻碳电极

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摘要

We report the analytical performance of glassy carbon electrodes (GCE) modified with a dispersion of multiwall carbon nanotubes (MWCNT) in polylysine (Plys) (GCE/MWCNT-Plys). The resulting electrodes show an excellent electrocatalytic activity towards different bioanalytes like ascorbic acid, uric acid and hydrogen peroxide. with important decrease in their oxidation overvoltages. The dispersion of 1.0 mg/mL MWCNT in 1.0 mg/mL polylysine is highly stable, since after 2 weeks the sensitivity for hydrogen peroxide at GCE modified with this dispersion remained in a 90%, of the original value. The MWCNT-Plys layer immobilized oil glassy carbon electrodes has been also used as a platform to build supramolecular architectures by self-assembling of polyelectrolytes based on the polycationic nature Of the polylysine used to disperse the nanotubes. The self-assembling of glucose oxidase has allowed LIS to obtain a supramolecular multistructure for glucose biosensing. The influence Of glucose oxidase concentration and adsorption time as well as the effect of using polylysine or MWCNT-Plys as polycationic layers for further adsorption of GOx is also evaluated.
机译：我们报告了修饰的玻碳电极（GCE）的分析性能，其中多壁碳纳米管（MWCNT）在聚赖氨酸（Plys）（GCE / MWCNT-Plys）中分散。所得电极对不同的生物分析物（如抗坏血酸，尿酸和过氧化氢）显示出优异的电催化活性。大大降低了它们的氧化过电压。 1.0 mg / mL MWCNT在1.0 mg / mL聚赖氨酸中的分散体是高度稳定的，因为经过2周后，用该分散体改性的GCE对过氧化氢的敏感性保持在原始值的90％。 MWCNT-Plys层固定的油状玻璃碳电极也已被用作基于用于分散纳米管的聚赖氨酸的聚阳离子性质通过自组装聚电解质来构建超分子体系结构的平台。葡萄糖氧化酶的自组装已使LIS获得用于葡萄糖生物传感的超分子多结构。还评估了葡萄糖氧化酶浓度和吸附时间的影响，以及使用聚赖氨酸或MWCNT-Plys作为聚阳离子层进一步吸附GOx的效果。

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