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. 2022 Dec 3;12(12):1121. doi: 10.3390/bios12121121

Figure 4.

Figure 4

Viral RNA-target Raman and SERS-based biosensors using plasmonic nanomaterials: (a) Schematics of the point-of-care SERS biosensor using non-enzymatic signal amplification method. This figure is reproduced from [78] (© 2022 Elsevier B.V.); (b) Capture DNA-functionalized Au nanostar for the detection of intracellular viral mutation. This figure is reproduced from [79] (© 2022 American Chemical Society); (c) Plasmonic AuNPs-assisted colorimetric biosensor for detection of SARS-CoV-2 N gene RNA. This figure is reproduced from [81] (© 2022 American Chemical Society); (d) Colorimetric/SERS/fluorescence triple-mode plasmonic biosensor based on DNA-functionalized AuNPs. This figure is reproduced from [83] (© 2022 Elsevier B.V.).