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. 2020 Jul 12;187(8):441. doi: 10.1007/s00604-020-04415-3

Fig. 9.

Fig. 9

Schematic operation procedure of the COVID-19 FET using graphene as channel material, modified by 1-pyrenebutyric acid N-hydroxysuccinimide ester via π-stacking, coupling the SARS-CoV-2 spike antibody. Reprinted with permission from [110]. Copyright (2020) American Chemical Society