Fig. 3.

DLS showing size distributions of the synthesized AuNPs a with × 1 cell-free filtrate, 1 mM HAuCl4 at 28 °C in dark, b under light, c with × 0.5 cell-free filtrate, d with × 2 cell-free filtrate, e at 0 °C, f at 15 °C, g at 75 °C, h at 100 °C, i with 0.5 mM HAuCl₄ and j with 2 mM HAuCl₄