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. Author manuscript; available in PMC: 2023 Sep 6.
Published in final edited form as: J Phys Chem Lett. 2021 Feb 25;12(8):2166–2171. doi: 10.1021/acs.jpclett.0c03570

Figure 2:

Figure 2:

A) Fluorescence spectra from Rh-6G conjugated spike protein specific DNA aptamer attached GNS in the absence of antigen and presence of SARS-CoV-2 spike recombinant antigen (10 pg/mL), flu virus antigen (100 pg/mL) and rotavirus antigen (100 pg/mL). The ratio of DNA aptamer and COVID-19 antigen was kept as 1: 1. B) Figure shows how SERS intensity from Rh-6G conjugated DNA aptamer attached GNS varies with the addition of antigen. The ratio of DNA aptamer and COVID-19 antigen was kept as 1: 1. C) Fluorescence spectra from Rh-6G conjugated spike protein specific DNA aptamer attached GNS in the presence of SARS-CoV-2 spike recombinant antigen (10 pg/mL), flu virus antigen (100 pg/mL) and rotavirus antigen (100 pg/mL). C) Plot indicates the variation of log of (NSET intensity change due to the addition of spike recombinant antigen) with the log of (amount of spike recombinant antigen).