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In the present study, the potential of aqueous whole plant extract of Croton sparsiflorus for biosynthesis of silver nanoparticles (AgNPs) was evaluated. The formation of AgNPs was confirmed by color changes and UV- Visible spectroscopy, which showed absorbance maxima peak at 417nm. The scanning electron microscope (SEM) analysis confirmed the particle size and x-ray diffraction (XRD) confirmed the crystalline character of AgNPs. AFM analysis also confirmed the surface morphology of synthesized AgNPs. Fourier transform infrared (FTIR) authorized the presence of alcoholic and phenolic groups played an important reduction role in the synthesis process. It shows the antibacterial efficiency against gram negative bacteria, Klebsiella pneumoniae and Salmonella paratyphi. From the results, it is suggested that green synthesized AgNPs could be used effective in future biomedical engineering. Keywords: Croton sparsiflorus, Green synthesis, Silver nanoparticles, X-ray diffraction, Antibacterial activity.

Croton sparsiflorus whole plant extract mediated biosynthesis of metallic silver nanoparticles and their antibacterial activity