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首页> 外文期刊>Biosensors & Bioelectronics: The International Journal for the Professional Involved with Research, Technology and Applications of Biosensers and Related Devices >Electrochemical sensor based on gold nanoparticles fabricated molecularly imprinted polymer film at chitosan-platinum nanoparticles/graphene-gold nanoparticles double nanocomposites modified electrode for detection of erythromycin
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Electrochemical sensor based on gold nanoparticles fabricated molecularly imprinted polymer film at chitosan-platinum nanoparticles/graphene-gold nanoparticles double nanocomposites modified electrode for detection of erythromycin

机译：基于金纳米粒子的电化学传感器在壳聚糖-铂纳米粒子/石墨烯-金纳米粒子双纳米复合修饰电极上制备分子印迹聚合物膜，用于检测红霉素

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A molecularly imprinted electrochemical sensor was fabricated based on gold electrode decorated by chitosan-platinum nanoparticles (CS-PtNPs) and graphene-gold nanoparticles (GR-AuNPs) nanocomposites for convenient and sensitive determination of erythromycin. The synergistic effects of CS-PtNPs and GR-AuNPs nanocomposites improved the electrochemical response and the sensitivity of the sensor. The molecularly imprinted polymers (MIPs) were prepared by HAuCl _4, 2-mercaptonicotinic acid (MNA) and erythromycin. Erythromycin and MNA were used as template molecule and functional monomer, respectively. They were first assembled on the surface of GR-AuNPs/CS-PtNPs/gold electrode by the formation of Au-S bonds and hydrogen-bonding interactions. Then the MIPs were formed by electropolymerization of HAuCl _4, MNA and erythromycin. The sensor was characterized by cyclic voltammetry (CV), scanning electron microscope (SEM), UV-visible (UV-vis) absorption speactra and amperometry. The linear range of the sensor was from 7.0×10 ~(-8)mol/L-9.0×10 ~(-5)mol/L, with the limit of detection (LOD) of 2.3×10 ~(-8)mol/L (S/N=3). The sensor showed high selectivity, excellent stability and good reproducibility for the determination of erythromycin, and it was successfully applied to the detection of erythromycin in real spiked samples.
机译：基于壳聚糖-铂纳米颗粒（CS-PtNPs）和石墨烯-金纳米颗粒（GR-AuNPs）纳米复合材料修饰的金电极，制备了分子印迹电化学传感器，用于方便，灵敏地测定红霉素。 CS-PtNPs和GR-AuNPs纳米复合材料的协同作用改善了电化学响应和传感器的灵敏度。分子印迹聚合物（MIP）由HAuC1 _4、2-巯基烟碱酸（MNA）和红霉素制备。红霉素和MNA分别用作模板分子和功能单体。它们首先通过形成Au-S键和氢键相互作用而组装在GR-AuNPs / CS-PtNPs /金电极的表面上。然后，通过HAuC1_4，MNA和红霉素的电聚合形成MIP。该传感器的特征在于循环伏安法（CV），扫描电子显微镜（SEM），紫外可见（UV-vis）吸收光谱和安培法。传感器的线性范围为7.0×10〜（-8）mol / L-9.0×10〜（-5）mol / L，检出限（LOD）为2.3×10〜（-8）mol / L / L（S / N = 3）。该传感器对红霉素的测定具有很高的选择性，极好的稳定性和良好的重现性，已成功应用于实际加标样品中的红霉素检测。

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