Structural and Surface Morphology Transformation of Plant Assisted Silver Nanoparticles and Its Biological Applications

Abstract

Article history: Received 05 February 2019 Accepted 18 February 2019 Available online 25 March 2019 The preparation, optimization and application of biogenic nanomaterials have become the major division of study in nanotechnology. This study reports the single step; eco-friendly synthesis of silver nanoparticles using the aqueous extract of Tridax procumbens plant extracts with different extract concentrations (10 mL to 40 mL). The aqueous extract of Tridax procumbens showed significant potential for the fast reduction of silver ions without using any external agents. XRD pattern of Ag-NPs was indexed to face-centered cubic structure. The structural parameters of silver nanoparticles have been estimated and grain size ranged from 21 nm to 44 nm. The UV-vis absorbance spectrum was observed at 424 nm. The FT-IR analysis confirmed the secondary metabolites bind on surface of the AgNPs. SEM studies concluded morphological transformation of surface of the silver nanoparticles. Silver nanospheres were transformed in to rectangular silver nanosheets by increasing the extract concentration. Elemental silver formations were confirmed by EDAX studies. The antibacterial efficacies of synthesized nanosilver were carried out against different human bacterial pathogens and found to show significant activity. Bio-synthesis of Ag-NPs using Tridax procumbens appears to be cost effective, biodegradable and an alternative to conventional synthesis methods.