Fig. 2From: Discrimination and isolation of the virus from free RNA fragments for the highly sensitive measurement of SARS-CoV-2 abundance on surfaces using a graphene oxide nano surfaceAnalysis of the GO-coated surface by a FTIR spectra, and b XPS spectrum of the carbon region. AFM image of c bare glass surface, d GO-coated surface treated with 90 kJ, and e GO-coated surface treated with 180 kJ. (Scale bar = 1 µm)Back to article page