<i>In vitro</i> antioxidant, antimicrobial, cytotoxic potential of gold and silver nanoparticles prepared using <i>Embelia ribes</i>

<p>In recent years, the green synthesis of gold (GNPs) and silver (SNPs) nanoparticles has gained great interest among chemists and researchers. The present study reports an eco-friendly, cost-effective, rapid and easy method for the synthesis of gold and silver nanoparticles using the seed extract of <i>Embelia ribes</i> (SEEr) as capping and reducing agent. The synthesised GNPs and SNPs were characterised using the following techniques: UV–vis spectroscopy, DLS, HR-TEM, FT-IR and XRD. The free radical scavenging potential of GNPs and SNPs was measured by DPPH assay and Phosphomolybdenum assay. Further, the antimicrobial activity against two micro-organisms were tested using disc diffusion method and cytotoxicity of GNPs and SNPs was determined against MCF-7 cell lines at different concentrations by MTT assay. Both the GNPs and SNPs prepared from <i>E. ribes</i> comparatively showed promising results thereby proving their clinical importance.</p