Photoassisted Synthesis of Silver Nanoparticles Using Riceberry Rice Extract and Their Antibacterial Application

Figure 5

Effect of different pH values: A pH 3, B pH 5, C pH 7, D pH 9, and E pH 11 (AgNO₃ : RB extract 1 : 12.5, 30 min irradiation) on the characteristics of AgNPs: (a) UV–vis spectra, (b) the color of AgNPs dispersed in solution, (c) SEM images, and (d) particle size distribution.

(a)

(b)

(c)

(d)