(A) SEM images of Ag NPs and Au NPs synthesized from aqueous extract of oyster mushroom P. sajor-caju. (a) Aqueous extract of oyster mushroom P. sajor-caju; (b) P. sajor-caju mediated synthesized Ag NPs and (c) Au NPs. (B) TEM images and size distribution histogram of biosynthesized Ag NPs (a to f) in which the scale bar represents at 100 nm (a), 50 nm (b), particle size histogram analysis of Ag NPs (c), 10 nm (d), and at 5 nm high-resolution TEM (HR-TEM) image of a single Ag NPs respectively with lattice fringes (e) and SAED pattern (f).; (C) TEM images and size distribution histogram of biosynthesized Au NPs (a to f) at 100 nm (a), at 50 nm (b), particle size histogram analysis of Au NPs (c), at 10 nm (d), at 5 nm HR-TEM image of an Au NPs respectively with lattice fringes (e) and SAED pattern (f).