Leaf Assisted Green Synthesis of Silver Nanoparticles from Syzygium Alternifolium (Wt.) Walp. Characterization and Antimicrobial Studies

Development of environmentally benign methods for synthesis of nanoparticles is an evolvingimportant branch of nanotechnology. In the present study we report a green method for synthesis ofstable silver nanoparticles (SNPs) from aqueous leaf extract of Syzygium alternifolium an endemicmedicinal plant to Southern Eastern Ghats. These green synthesized nanoparticles are characterized byusing UV-VIS spectroscopy, FTIR, XRD, AFM, SEM with EDAX and TEM. The colour change fromyellow to grey is observed upon synthesis and 448 nm peak was obtained from UV-VIS spectroscopicanalysis. FTIR spectroscopic studies confirms that phenols and proteins of leaf extract is mainresponsible for capping and stabilization of these SNPs. Crystallographic studies from XRD indicatedthe SNPs are crystalline in nature and owing 44 nm size. High resolution and magnification studieswith AFM, SEM and TEM analysis revealed that the nanoparticles are spherical in shape having thesize range from 7 to 44 nm. EDAX pattern of synthesized SNPs showed 47.28 weight percentageof Ag metal in the sample indicate the purity of sample. Further, the antimicrobial studies of thesegreen synthesized SNPs show high toxicity towards different bacterial and fungal isolates. The resultsrevealed that the selected medicinal plant possess the potentiality towards the synthesis of narrowrange nanoparticles also combat with the pathogens.