A Swiss research team announced on 2 1 that they have developed a biosensor, which can detect COVID-19 in the air sensitively and reliably. It can not only be used as an alternative method for clinical diagnosis of COVID-19 infection, but also be used for real-time monitoring whether there is COVID-19 in the air of railway stations, hospitals and other crowded places.
The Swiss Federal Laboratory for Materials Science and Technology 2 1 issued a communique saying that this new biosensor was developed by the institute in cooperation with the Federal Institute of Technology in Zurich and the University Hospital of Zurich. It is based on a gold nanostructure named "Gold Nanoisland" prepared on a glass substrate. Researchers "grafted" a synthetic DNA receptor matched with COVID-19 RNA sequence to the gold nanostructure, enabling it to recognize COVID-19.
According to reports, this new sensor uses two different effects of "local surface plasma vibration" and "plasma photothermal" in the process of detecting viruses, which increases the reliability of detection. Experiments show that the sensor can accurately identify two viruses with similar gene sequences, COVID-19 and SARS coronavirus, and get the detection results in a few minutes.
Related papers have been published in Nano Journal of American Chemical Society.
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