Figure 9From: Tunability and stability of gold nanoparticles obtained from chloroauric acid and sodium thiosulfate reactionTEM images of the growth progress of gold nanoparticles. After mixing 5 mL 1.71 mM HAuCl4 with 0.8 ml of 3.0 mM Na2S2O3. (a) Product at 40 min, (b) 2 h, (c) 4 h, and (d) 1 day. (e, f, g, and h) show the gain sizes on the gold crystal surface of the products at 40 min, 2 h, 4 h, and 1 day, respectively.Back to article page