Photoscopic characterization of green synthesized silver nanoparticles from Trichosanthes tricuspidata and its antibacterial potential

The present study focused on the finding of reducing agents for the formation of silver nanoparticles (AgNPs) from the plant, Trichosanthes tricuspidata. The synthesized AgNPs were characterized using UV-Visible spectroscopy, particle size analyzer (PSA), X-ray diffraction (XRD), scanning electron microscopy (SEM) and atomic force microscopy (AFM) analyses. The UV-Visible spectrum resulted a sharp peak (at 430 nm) represents the strong plasmon resonance of silver. The average size distributions of AgNPs were found to be 78.49 nm, through (PSA), and the silver ion with its crystalline nature was confirmed using intensity (2 theta) peak value of 38.22 degrees, 44.66 degrees, 64.61 degrees, and 77.49 degrees. The SEM micrograph revealed that the synthesized AgNPs have a spherical morphology with the size ranges from 20 to 28 nm. AFM showed the presence of polydispersed AgNPs with its size (20 to 60 nm in height). The gas chromatography-mass spectroscopy (GC-MS) study analyzed the responsible compounds present in the methanolic extracts for the bio-reduction of AgNPs and their antibacterial effect was studied. AgNPs exhibited preponderant activity than the methanolic extracts on clinical pathogens. Thus, the synthesized AgNPs might act as an effective antibacterial agent. Further studies are required to isolate the specific compound responsible for the reduction capability and its their inhibitory mechanisms for target bacterial strains. (C) 2015 Elsevier B.V. All rights reserved.