Green Synthesis of Gold and Silver Nanoparticles Using Opuntia dillenii Aqueous Extracts: Characterization and Their Antimicrobial Assessment

Figure 9

Visual effect of pH on AgNPs (a) and AuNPs (c) and UV-visible data of pH effect on AgNPs (b) and AuNPs (d).

(a)

(b)

(c)

(d)