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TEM images of various metallic nanoparticles (NPs). (A) Cadmium sulfide NPs (CdSNPs) by Phormidium tenue [90], (B) copper oxide NPs (CuONPs) by Bifurcaria bifurcata [92], (C) iron oxide NPs (Fe2O3NPs) by Sargassum muticum [94], (D) palladium NPs (PdNPs) by Spirulina platensis [97], (E) zinc oxide NPs (ZnONPs) by Sargassum muticum [99]. (Copyright permission has been granted for each figure).
