Biosynthesis, characterization and antimicrobial studies of green synthesized silver nanoparticles from fruit extract of Syzygium alternifolium (Wt.) Walp. an endemic, endangered medicinal tree taxon

Abstract

In nanotechnology, the plant mediated synthesis of nanoparticles has terrific application in biomedicine due to its novel properties and its eco-friendly nature. The present study deals with the biosynthesis of stable silver nanoparticles (SNPs) from aqueous fruit extract of S. alternifolium an endemic medicinal plant to Eastern Ghats. The synthesized nanoparticles are characterized by UV-VIS spectroscopy, FTIR, XRD, AFM, SEM with EDAX and TEM. Colour change from brown to grey indicates the formation of nanoparticles and UV-VIS surface plasmon resonance spectroscopy observed at 442 nm further confirms the synthesized nanoparticles are SNPs. FTIR studies reveal that the phenols and primary amines of proteins are main responsible for reduction, stabilization and capping agents towards these SNPs. The XRD data show crystalline nature of nanoparticles and EDAX measurements reveal the (12.74 %) percentage presence of Ag metal. AFM, SEM and TEM microscopic analyses revealed that the size of synthesized SNPs ranging from 5 to 68 nm has spherical shape and they are in polydispersed condition. Further, the antimicrobial studies of synthesized SNPs show high toxicity towards different bacterial and fungal isolates. This is the first report on fruit mediated synthesis of silver nanoparticles from S. alternifolium.

Enhanced antibacterial activity of streptomycin against some human pathogens using green synthesized silver nanoparticles

“…It is observed that reflections are sharp and high in intensity, indicating that the prepared silver nanoparticles are highly crystalline in nature. Similar results were found by Yugandhar et al [41] using Syzygium alternifolium stem extracts mediated synthesis of silver nanoparticles.…”

“…However, the overuse of silver agents has decreased their efficiency as antimicrobial agent [41]. The results of present investigation revealed a considerable antibacterial activity of synthesized silver nanoparticles for all bacteria.…”

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

“…In our previous studies, synthesis of silver nanopatricles from fruit extract of S. alternifolium shows spherical shaped nanoparticles with the size up to 68 nm [40]. In this study, the nanoparticles are spherical in shape having size range up to 44 nm.…”

Green-Synthesized Mosquito Oviposition Attractants and Ovicides: Towards a Nanoparticle-Based “Lure and Kill” Approach?

“…Overall, the rapid reduction of silver ions might be linked with the presence of water-soluble phytochemicals such as flavones, quinones, and organic acids present in the leaf extract of A. cymosa. AFM is a primary tool for analyzing size, shape, and agglomeration pattern [33]. It offers visualizations of three-dimensional views of the nanoparticles unlike the electron microscopes.…”