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A photoelectrochemical glucose sensor based on gold nanoparticles as a mimic enzyme of glucose oxidase

机译：基于金纳米颗粒作为葡萄糖氧化酶模拟酶的光电化学葡萄糖传感器

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摘要

This work reports the first construction of the ternary layers of ITO/PbS/SiO2/AuNPs nanostructure for development of photoelectrochemical (PEC) glucose sensor. Herein, the thioglycolic acid-capped PbS quantum dots was employed as a PEC active probe, which is very sensitive to oxygen. The small gold nanoparticles (AuNPs) were act as nanozyme (mimic enzyme of glucose oxidase) to catalytically oxidize glucose in the presence of oxygen, meanwhile consumed oxygen and then resulted in the decrease of cathodic photocurrent. The insertion layer of SiO2 nanoparticles between PbS and AuNPs could reduce efficiently the base current due to its low electroconductivity, which improved the detection limit. The proposed PEC sensor exhibited high sensitivity and gold selectivity towards glucose. The linear response of glucose concentrations ranged from 1.0 M to 1.0 mM with detection limit of 0.46 M (S/N = 3). The results suggest the potential of design and development of numerous nanozyme-based PEC biosensors with the advantage of the simplicity, stability, and efficiency.
机译：该工作报告了第一层的ITO / PBS / SiO2 / AUNPS纳米结构的第一次构建，用于光电化学（PEC）葡萄糖传感器的开发。在此，使用巯基乙酸封端的PBS量子点作为PEC活性探针，其对氧气非常敏感。小金纳米颗粒（AUNP）作为纳米沸点（葡萄糖氧化酶的模拟酶）起到含氧在氧气存在下催化氧化葡萄糖，同时消耗氧气，然后导致阴极光电流降低。由于其低导电性，PBS和AUNP之间的SiO2纳米颗粒的插入层可以有效地减少基本电流，这改善了检测限。所提出的PEC传感器对葡萄糖具有高灵敏度和金色选择性。葡萄糖浓度的线性响应范围为1.0μm至1.0mm，检出限为0.46μm（s / n = 3）。结果表明，具有众多基于纳佐的PEC生物传感器的设计和开发的潜力，其具有简单性，稳定性和效率的优势。

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  • 来源
    《RSC Advances》 |2019年第27期|共7页
  • 作者

    Cao Ling; Wang Panpan; Chen Li; Wu Ying; Di Junwei;

  • 作者单位

    Soochow Univ Coll Chem Chem Engn &

    Mat Sci Suzhou 215123 Peoples R China;

    Soochow Univ Coll Chem Chem Engn &

    Mat Sci Suzhou 215123 Peoples R China;

    Soochow Univ Coll Chem Chem Engn &

    Mat Sci Suzhou 215123 Peoples R China;

    Soochow Univ Coll Chem Chem Engn &

    Mat Sci Suzhou 215123 Peoples R China;

    Soochow Univ Coll Chem Chem Engn &

    Mat Sci Suzhou 215123 Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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