Plant-mediated biosynthesis of silver nanoparticles using Prosopis farcta extract and its antibacterial properties

• A “green” method was applied to synthesis of Ag-NPs using Prosopis farcta extract.
• Ag-NPs were biosynthesized at room temperature.
• UV–vis spectrophotometric analysis was shown a SPR peak nearly at 433 nm.
• It was observed that the mean size of spherical shape Ag-NPs is about 8–11 nm.
• The biosynthesized Ag-NPs was shown slight antibacterial activity.

“Green” synthesis of metal nanoparticles has become a promising synthetic strategy in nanoscience and nanotechnology in recent years. In this work, silver nanoparticles (Ag-NPs) were synthesized from extract of Prosopis farcta at room temperature. Formation of Ag-NPs at 1 mM concentration of AgNO3 gave spherical shape nanoparticles with mean diameter about 10.8 nm. The formation of nanoparticle was confirmed by the surface Plasmon resonance (SPR) band illustrated in UV–vis spectrophotometer. The morphology and size of the Ag-NPs were determined using high magnification transmission electron microscopy (TEM). The crystalline structure of obtained nanoparticles was investigated using the powder X-ray diffraction (PXRD) pattern. In addition, these green synthesized Ag-NPs were found to show higher antibacterial activity against multi drug resistant clinical isolates.

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