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An ultrasensitive aptasensor of SARS-CoV-2 N protein based on ion current rectification with nanopipettes
Ma, Wenhao1; Xie, Wanyi2,4; Tian, Rong2,4; Zeng, Xiaoqing; Liang, Liyuan2,4; Hou, Changjun1,3; Huo, Danqun1; Wang, Deqiang2,4
2023-02-15
摘要Since the outbreak of COVID-19 in the world, it has spread rapidly all over the world. Rapid and effective detection methods have been a focus of research. The SARS-CoV-2 N protein (NP) detection methods currently in use focus on specific recognition of antibodies, but the reagents are expensive and difficult to be produced. Here, aptamer-functionalized nanopipettes utilize the unique ion current rectification (ICR) of nanopipette to achieve rapid and highly sensitive detection of trace NP, and can significantly reduce the cost of NP detection. In the presence of NP, the surface charge at the tip of the nanopipette changes, which affects ion transport and changes the degree of rectification. Quantitative detection of NP is achieved through quantitative analysis. Relying on the high sensitivity of nanopipettes to charge fluctuations, this sensor platform achieves excellent sensing performance. The sensor platform exhibited a dynamic working range from 102-106 pg/mL with a detection limit of 73.204 pg/mL, which showed great potential as a tool for rapidly detecting SARS-CoV-2. As parallel and serial testing are widely used in the clinic to avoid missed diagnosis or misdiagnosis, we hope this platform can play a role in controlling the spread and prevention of COVID-19.
关键词Nanopipette Aptamer Ion current rectification N protein
DOI10.1016/j.snb.2022.133075
发表期刊SENSORS AND ACTUATORS B-CHEMICAL
卷号377页码:7
通讯作者Hou, Changjun(houcj@cqu.edu.cn) ; Huo, Danqun(huodq23@163.com) ; Wang, Deqiang(dqwang@cigit.ac.cn)
收录类别SCI
WOS记录号WOS:000904895500006
语种英语