Figure 5.

(a) The schematic diagram of the colorimetric and SERS dual-mode detection of SARS-CoV-2 based on LFIA. Reprinted with permission from ref. [57]. Copyright 2022, American Chemical Society. (b) the preparation process of AuNPs and the tri-mode detection of target RNA. Reprinted with permission from ref. [58]. Copyright 2021, Elsevier. (c) Dual-mode LFIA for the simultaneous detection of the S and NP of SARS-CoV-2 by Fe₃O₄ nanocomposites with a multilayer QD-Shell. Reprinted with permission from ref. [60]. Copyright 2021, American Chemical Society.