Green synthesis of silver nanoparticles using Allium cepa extract and their antimicrobial activity evaluation

Ahmed Naseer, Munawar Iqbal, Salman Ali, Arif Nazir, Mazhar Abbas and Naveed Ahmad

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Nanoparticles synthesis route is one important aspect for practical application and easy, eco-friendly, non-toxic and low-cost methods are preferred in this regard. In this study, we described the fabrication of silver nanoparticles utilizing Allium cepa (Onion) extract, which were characterized by SEM, EDX, and XRD technique. The biosynthesized Ag NPs was face-centered, spherical in shape, and particle size was in nanometer range of 30-100 nm (with average size of 84.8 nm), which were in aggregated form. The EDX analysis revealed the formation of highly pure form of the silver nanoparticles. The antibacterial activity was assessed against E. coli and S. aureus microbes and results revealed that the silver nanoparticles are highly active against the selected microbes and silver nanoparticles have potential for application in biomedical field.