Fig. 2. Morphological evolution of AgNDs at various AgNO₃ concentrations: (a) 5 mM (0.8 μg μL⁻¹); (b) 10 mM (1.6 μg μL⁻¹); (c) 15 mM (2.5 μg μL⁻¹); (d) 20 mM (3.3 μg μL⁻¹); (e) 25 mM (4.2 μg μL⁻¹); (f) 30 mM (5.09 μg μL⁻¹); (g) 35 mM (5.94 μg μL⁻¹); (h) 40 mM (6.79 μg μL⁻¹). (i) Corresponding EDS spectrum.