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首页> 外文期刊>Chemistry: A European journal >Enzyme-Free Amperometric Sensing of Glucose by Using Gold Nanoparticles
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Enzyme-Free Amperometric Sensing of Glucose by Using Gold Nanoparticles

机译：使用金纳米颗粒对葡萄糖的无酶安培感测

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摘要

A nonenzymatic electrochemical method is described for the detection of glucose by using gold(Au)nanoparticles self-assembled on a three-dimensional(3D)silicate network obtained by using sol-gel processes.The nanosized Au particles have been self-assembled on the thiol tail groups of the silicate network and enlarged by hydroxylamine.The Au nanoparticles efficiently catalyze the oxidation of glucose at less-positive potential(0.16 V)in phosphate buffer solution(pH 9.2)in the absence of any enzymes or redox mediators.The Au nanoparticle-modified transducer (MPTS-nAuE)was successfully used for the amperometric sensing of glucose and it showed excellent sensitivity with a detection limit of 50 nM.The common interfering agent ascorbate (AA)does not interfere with the detection of glucose.The MPTS-nAuE transducer showed individual voltam-metric responses for glucose and AA.This transducer responded linearly to glucose in the range of 0-8 mM and the sensitivity of the transducer was found to be 0.179 nAcm~(-2)nM~(-1).Excellent re-producibility,and long-term storage and operational stability was observed for this transducer.
机译：描述了一种非酶电化学方法，通过使用溶胶-凝胶法获得的三维（3D）硅酸盐网络上自组装的金（Au）纳米颗粒来检测葡萄糖。在没有任何酶或氧化还原介体的情况下，Au纳米颗粒可在磷酸盐缓冲液（pH 9.2）中以较低的正电位（0.16 V）有效催化葡萄糖的氧化。纳米修饰传感器（MPTS-nAuE）已成功用于葡萄糖的安培传感，并显示出极好的灵敏度，检测极限为50 nM。普通抗坏血酸（AA）不会干扰葡萄糖的检测。 -nAuE传感器对葡萄糖和AA表现出单独的伏安响应，该传感器对0-8 mM范围内的葡萄糖呈线性响应，并且发现传感器的灵敏度为为0.179 nAcm〜（-2）nM〜（-1）。该换能器具有出色的重现性，并可以长期保存和操作。

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