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. 2022 Oct 8;253:123992. doi: 10.1016/j.talanta.2022.123992

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Scheme 1 — (A) Schematic illustration of the proposed PNA-based ePAD with front and back views; (B) the detection principle and procedure for SARS-CoV-2 detection using the PNA-based ePAD sensor connected with a smartphone-based potentiostat.