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.
Highlights
In the recent past, nanoparticles are gaining much importance in the fields of biology, medicine, and electronics owing to their unique physical and biological properties (Morones et al 2005)
Atomic force microscopy (AFM), Scanning electron microscopy (SEM) and TEM microscopic analyses revealed that the size of synthesized silver nanoparticles (SNPs) ranging from 5 to 68 nm has spherical shape and they are in polydispersed condition
The results indicated that the reaction product has high purity of SNPs
Summary
Nanoparticles are gaining much importance in the fields of biology, medicine, and electronics owing to their unique physical and biological properties (Morones et al 2005). Different types of nanoparticles are synthesized using plant materials like Indium oxide nanoparticles from Aloe vera (Maensiria et al 2008), Iron oxide nanoparticles from Medicago sativa (Herrera-Becerra et al 2008), Palladium nanoparticles from Cinnamomum camphora (Yang et al 2009), Copper nanoparticles from Magnolia kobus (Lee et al 2013), Cadmium Oxide Nanoparticles from Achillea wilhelmsii (Javad and Sasan 2013). Among the metal nanoparticles, SNPs synthesized from medicinal plants have received much attention in various biological activities like antibacterial (Savithramma et al 2011a), antifungal (Savithramma et al 2011b), anthelmintic (Seema and Amrish 2012), antilarvicidic (Sundaravadivelan et al 2013), antioxidant (Swamy et al 2014), anticancer (Vasanth et al 2014), antiinflammatory (Rafie and Hamed 2014), hepatoprotective (Bhuvaneswari et al 2014) and wound healing (Seema et al 2014) activities
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