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3D Pyramidal Micropool Array Electrode for Amperometric Microsensor

机译:用于电流微传感器的3D金字塔形微池阵列电极

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摘要

This paper reports a novel three-dimensional (3D) microelectrode to enhance the sensitivity and current output of the amperometric microsensor. Based on silicon bulk micromachining technology and the introduction of nanomaterials, the 3D microelectrodes (3DME) are fabricated as working electrodes of the amperometric sensor. It comprises both sensitive microstructures and platinum (Pt) nanoparticles. The 3D micro structure can enlarge the effective surface area of working electrode and make more analyte to approach electrode surface more easily. This design provides a better microenvironment for electrodeposition of platinum nanoparticales. It further improves the enhancement effect of catalytic efficiency and electroactivity for the microelectrode. The sensor has been successfully used to detect H_2O_2, which is a vital target analyte in glucose detection and enzyme-linked immunodetection. Compared with amperometric biosensor based on planar microelectrode (PME), this sensor has advantages of lower detection limit, higher current signal and higher sensitivity.
机译:本文报道了一种新颖的三维(3D)微电极,可提高电流型微传感器的灵敏度和电流输出。基于硅体微加工技术和纳米材料的引入,将3D微电极(3DME)制作为安培传感器的工作电极。它包含敏感的微结构和铂(Pt)纳米颗粒。 3D微观结构可以扩大工作电极的有效表面积,并使更多的分析物更容易接近电极表面。该设计为电沉积铂纳米粒子提供了更好的微环境。它进一步提高了微电极的催化效率和电活性的增强效果。该传感器已成功用于检测H_2O_2,这是葡萄糖检测和酶联免疫检测中的重要目标分析物。与基于平面微电极(PME)的安培生物传感器相比,该传感器具有检测限低,电流信号高,灵敏度高的优点。

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