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• W3167409797 abstract "Influenza A virus (IAV) poses a significant threat to human health, which calls for the development of efficient detection methods. The present study constructed a fluorescence resonance energy transfer (FRET) system based on novel fluorescent probes and graphene oxide (GO) for detecting H5N1 IAV hemagglutinin (HA). Here, we synthesized small (sub-20 nm) sandwich-structured upconversion nanoparticles (UCNPs) (SWUCNPs for short) with a high energy transfer efficiency, which allows for controlling the emitter in a thin shell. The π–π stacking interaction between the aptamer and GO shortens the distance between the fluorescent probe and the receptor, thereby realizing fluorescence resonance energy transfer (FRET). When HA is present, the aptamer enables changes in their conformations and move away from GO surface. Fluorescence signals display a linear relationship between HA quantitation in the range of 0.1–15 ng mL–1 and a limit of detection (LOD) of 60.9 pg mL–1. The aptasensor was also applicable in human serum samples with a linear range from 0.2 to 12 ng mL–1 and a limit of detection of 114.7 pg mL–1. This strategy suggested the promising prospect of the aptasensor in clinical applications because of the excellent sensing performance and sensitivity. This strategy may be promising for vitro diagnostics and provides new insights into the functioning of the SWUCNPs system." @default.
• W3167409797 created "2021-06-22" @default.
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• W3167409797 date "2021-06-04" @default.
• W3167409797 modified "2023-10-02" @default.
• W3167409797 title "Upconversion Fluorescence Resonance Energy Transfer Aptasensors for H5N1 Influenza Virus Detection" @default.
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• W3167409797 doi "https://doi.org/10.1021/acsomega.1c01491" @default.
• W3167409797 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/8210407" @default.
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• W3167409797 hasPublicationYear "2021" @default.
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