Fig. 6. (a–d) TEM images of four SNC samples with different particle sizes obtained by controlling the amount of Na₂PdCl₄ in the reaction: (a) 14.5 mg, (b) 29 mg, (c) 57 mg, and (d) 114 mg. The inset in each panel shows the size distribution of the SNCs. (e–f) Corresponding products after 3 days of ripening.