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Feasibility of this method for the SARS-CoV-2 RNA detection. (A) AFM phase image of DNA nanoscaffold. (B) The agarose gel electrophoresis of the synthesized DNA nanoscaffolds and the DNHCR response to the target. (C) Left: fluorescence spectra of the DNHCR and HCR in the absence and presence of the target (Excitation, 494 nm). Right: UV imaging of the DNHCR and HCR in the absence and presence of the target.
