Fig. 5

A Bio scaffold arrays of cicada wings as 3D templates for the fabrication of biomimetic SERS substrate: schematic of the fabrication process and virus detection, SEM images of the resulting 3D biomimetic Ag-decorated substrates and SERS spectra of PCV2, PRV, and H5N1 illustrating the Raman enhancement. B Schematic illustration in the fabrication of 3D Cu plasmonic structures photonic structures using butterfly wings, SEM characterization of the substrate, and SERS spectra of DNA base molecules, (adenine and guanine), acquired using the Cu decorated butterfly wings substrates. Reprinted with permission from ref. [157] (A) and [158] (B)