期刊
NANOSCALE
卷 13, 期 22, 页码 10133-10142出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d1nr01652k
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资金
- Shenzhen Science and Technology Research Funding [JCYJ20180507182429941, JCYJ20200109115212546, JSGG20180507181549961]
- National Natural Science Foundation of China [11974371, 31971368]
- National Natural Science Foundation of China-The Royal Society of Edinburgh Joint Project [82111530213]
- Shenzhen Engineering Laboratory of Single-Molecule Detection and Instrument Development [XMHT20190204002]
- EPSRC UK [13812]
- EPSRC [EP/M013812/1] Funding Source: UKRI
The study introduces a rapid SARS-CoV-2 detection method based on SEIRA spectroscopy, which is characterized by its simplicity, quick detection, no amplification needed, and cost-effectiveness, potentially useful for monitoring and controlling future pandemics.
Efficient point-of-care diagnosis of severe acute respiratory syndrome-corovavirus-2 (SARS-CoV-2) is crucial for the early control of novel coronavirus infections. At present, polymerase chain reaction (PCR) is primarily used to detect SARS-CoV-2. Despite the high sensitivity, the PCR process is time-consuming and complex which limits its applicability for rapid testing of large-scale outbreaks. Here, we propose a rapid and easy-to-implement approach for SARS-CoV-2 detection based on surface enhanced infrared absorption (SEIRA) spectroscopy. The evaporated gold nano-island films are used as SEIRA substrates which are functionalized with the single-stranded DNA probes for specific binding to selected SARS-CoV-2 genomic sequences. The infrared absorption spectra are analyzed using the principal component analysis method to identify the key characteristic differences between infected and control samples. The SEIRA-based biosensor demonstrates rapid detection of SARS-CoV-2, completing the detection of 1 mu M viral nucleic acids within less than 5 min without any amplification. When combined with the recombinase polymerase amplification treatment, the detection capability of 2.98 copies per mu L (5 aM) can be completed within 30 min. This approach provides a simple and economical alternative for COVID-19 diagnosis, which can be potentially useful in monitoring and controlling future pandemics in a timely manner.
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