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Anisotropic gold nanoparticles for the highly sensitive colorimetric detection of glucose in human urine

机译：各向异性金纳米颗粒用于人尿中葡萄糖的高灵敏比色检测

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Because of the difference in the surface energies of various crystal facets that arise from a large fraction of edges, corners and vertices, the morphology of nanoparticles has extreme potential for various applications. In this report, using poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS) functionalized anisotropic gold nanoparticles (GNPs) we have demonstrated a simple but robust method for the naked eye colorimetric detection of glucose in human urine with high sensitivity. Glucose oxidase (GOx) was conjugated to the modified anisotropic GNPs. The controlled degree of PEDOT:PSS attached onto the surface of the GNPs was crucial for the detection of glucose. The GNPs were aggregated and the color of the solution changed from pink to blue upon the addition of only 10 mu g mL(-1) of glucose. The detection limit for glucose was found to be 9.8 mu M. Such highly sensitive naked eye detection using PEDOT:PSS will be very useful for low cost homemade sensors.
机译：由于由很大一部分的边缘，拐角和顶点引起的各种晶面的表面能差异，纳米颗粒的形态对于各种应用具有极大的潜力。在此报告中，使用聚（3,4-乙撑二氧噻吩）聚苯乙烯磺酸盐（PEDOT：PSS）功能化的各向异性金纳米颗粒（GNP），我们展示了一种简单而稳定的方法，用于肉眼比色法以高灵敏度检测人尿中的葡萄糖。葡萄糖氧化酶（GOx）与修饰的各向异性GNP偶联。附着在GNP表面上的PEDOT：PSS的受控程度对于检测葡萄糖至关重要。仅添加10μg mL（-1）葡萄糖时，GNP聚集，溶液的颜色从粉红色变为蓝色。葡萄糖的检出限为9.8μM。使用PEDOT：PSS进行的这种高度灵敏的肉眼检测对于低成本的自制传感器将非常有用。

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