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基于 Ag-MOF 的 COVID-19 电化学免疫传感器:用于有效检测的快速高选择性鼻腔拭子测试。

COVID-19 electrochemical immunosensor with Ag-MOF: Rapid and high-selectivity nasal swab testing for effective detection.

机构信息

Center of Excellence in Electrochemistry, School of Chemistry, College of Science, University of Tehran, Tehran, 1439817435, Iran.

Nanobiosensors Lab, Department of Life Science Engineering, Faculty of New Sciences & Technologies, University of Tehran, Tehran, 1439817435, Iran.

出版信息

Anal Biochem. 2024 Jun;689:115500. doi: 10.1016/j.ab.2024.115500. Epub 2024 Feb 29.

Abstract

Early detection of the coronavirus is acknowledged as a crucial measure to mitigate the spread of the pandemic, facilitating timely isolation of infected individuals, and disrupting the transmission chain. In this study, we leveraged the properties of synthesized Ag-MOF, including high porosity and increased flow intensity. Electrochemical techniques such as cyclic voltammetry (CV) and differential pulse voltammetry (DPV) were employed to develop an economical and portable sensor with exceptional selectivity for COVID-19 detection. The methodology involves the deposition of Ag-MOF onto the surface of a Glassy Carbon Electrode (GCE), which resulted in a progressive augmentation of electric current. Subsequently, the targeted antibodies were applied, and relevant tests were conducted. The sensor demonstrated the capacity to detect the virus within a linear range of 100 fM to 10 nM, boasting a noteworthy Limit of Detection (LOD) of 60 fM. The entire detection process could be completed in a brief duration of 20 min, exhibiting high levels of accuracy and precision, outperforming comparable techniques in terms of speed and efficacy.

摘要

早期发现冠状病毒被认为是减轻大流行传播的关键措施,可以及时隔离感染者,并打断传播链。在这项研究中,我们利用合成的 Ag-MOF 的特性,包括高孔隙率和增强的流动强度。我们采用电化学技术,如循环伏安法 (CV) 和差分脉冲伏安法 (DPV),开发了一种经济且便携的传感器,该传感器对 COVID-19 的检测具有出色的选择性。该方法包括将 Ag-MOF 沉积在玻碳电极 (GCE) 的表面上,这导致电流逐渐增加。随后,应用靶向抗体并进行相关测试。该传感器能够在 100 fM 至 10 nM 的线性范围内检测到病毒,具有 60 fM 的显著检测限 (LOD)。整个检测过程可以在 20 分钟的短时间内完成,具有高度的准确性和精密度,在速度和效果方面优于可比技术。

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