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

Figure 3

Effect of different irradiation times: A 5 min, B 10 min, C 20 min, and D 30 min (AgNO₃ : RB extract 1 : 12.5, pH 2.5) 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.

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