Fig. 8From: Green Synthesis and Catalytic Activity of Gold Nanoparticles Synthesized by Artemisia capillaris Water ExtractUV-visible spectra of 4-NP reduction reaction with cf-AC-AuNP catalysts. cf-AC-AuNPs were prepared by centrifugation of AC-AuNPs. The detailed procedure is in the experimental section. a 0.015 %. b 0.025 %. c 0.035 %. d 0.045 %. e 0.055 %Back to article page