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TEM images of AuNPs synthesized using 1 mL OH extract (A), 0.5 mL OH extract (B), 0.25 mL OH extract (C) and 1 mL OF extract (D).
Note: The insets in (D) are higher magnification images of the NPs synthesized using 1 mL OF extract.
Abbreviations: TEM, transmission electron microscopy; AuNP, gold nanoparticle; OH, Origanum herba; OF, Origanum folium; NP, nanoparticle.
