Fig. 2. (A) UV-vis spectrum and corresponding digital photographs (right inset) of the as-prepared citrated-seed, and seed-growth colloidal solution stirred for different times from 5, 10, 15, 20, to 25 minutes. TEM image of citrate-stabilized seed particles stirred in the growth solution for (B) 10 minutes, and (C) 20 minutes.
