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TEM images of gold nanoparticles synthesized with 1 mg/ml biosurfactant and 2 mM HAuCl4, incubated at 90°C. Images of nanoparticles at various resolutions are shown: (A) 100 nm, (B) 20 nm, (C) 10 nm and (D) 5 nm scale. Inset in (C): Corresponding SAED pattern
