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. 2023 Jun 8;9(6):e17124. doi: 10.1016/j.heliyon.2023.e17124

Fig. 1.

Fig. 1

Observed colour change during the biosynthesis of AuNPs using Nymphaea lotus. The HAuCl4 solution before the addition of N. lotus (A), the formation of NL-AuNPs after the addition of N. lotus to the HAuCl4 solution (B).