Figure 3From: Effect of both protective and reducing agents in the synthesis of multicolor silver nanoparticlesEvolution of UV–vis maxima absorption bands of the silver sols in regions 1 and 2. Absorption bands in regions 1 and 2 are 400 to 500 nm and 600 to 700 nm, respectively. They are prepared with different PAA concentrations at a constant molar DMAB concentration (0.33 mM).Back to article page