Phytosynthesis of Silver and Gold Nanoparticles Using the Hot Water Extract of Mixed Woodchip Powder and Their Antibacterial Efficacy

Figure 4

Effect of alkaline pH on the phytosynthesis of AgNP. UV-Vis spectrum after reaction for 24 h at various pH values (a), blue shift of the SPR band depicted by average values at various pH (b), time-course measurement of UV-Vis spectrum at pH 13 (c), and reaction curve at pH 13 depicted by average as a function of time (d).

(a)

(b)

(c)

(d)