Figure 1From: Tunability and stability of gold nanoparticles obtained from chloroauric acid and sodium thiosulfate reactionGNP samples after mixing Na 2 S 2 O 3 and HAuCl 4 solutions. The GNP solutions after mixing 2.2, 2.0, 1.8, 1.6, 1.4, 1.2, 1.0, 0.8, and 4.0 mL (samples 1 through 9, respectively) of 3.0 mM Na2S2O3 with 5 mL of 1.71 mM HAuCl4 at 1 h and 1 day, respectively. Photos were taken after the samples were diluted five times with water.Back to article page