Publications (2)5.06 Total impact
-
Article: Biosynthesis of Cu, ZVI and Ag nanoparticles using Dodonaea viscosa extract for antibacterial activity against human pathogens
[show abstract] [hide abstract]
ABSTRACT: Biosynthesis of copper, zero valent iron and silver nanoparticles using leaf extract of Dodonaea viscosa has been investigated in this report. There are no additional surfactants / polymers used as capping or reducing agents for these syntheses. The synthesized nanoparticles were characterized by UV-Vis spectroscopy, X-Ray Diffraction, Atomic Force Microscopy and High Resolution Transmission Electron Microscopy. The phase analysis was performed using Selected Area Electron Diffraction (SAED). The pH dependence of Surface Plasmon Resonance (SPR) and subsequent size variation has been determined. The synthesized nanoparticles showed spherical morphology and the average size of 29 nm, 27 nm and 16 nm for Cu, ZVI and Ag nanoparticles respectively. Finally, biosynthesized Cu, ZVI and Ag nanoparticles were tested against human pathogens viz. Gram negative Escherichia coli, Klebsiella pneumonia, Pseudomonas fluorescens and Gram positive Staphylococcus aureus and Bacillus subtilis and showed good antimicrobial activity.Journal of Nanoparticle Research 12/2012; · 3.29 Impact Factor -
Article: Rapid Biosynthesis of Silver Nanoparticles using Eichornia crassipes and its Antibacterial Activity
[show abstract] [hide abstract]
ABSTRACT: In this paper, we have studied the rapid synthesis and antimicrobial activity of silver nanoparticles synthesized using extract of Eichornia crassipes (Water Hyacinth) which is considered as one of the most notorious aquatic weeds present all over the world. The synthesized nanoparticles exhibited absorption maximum at 420 nm which is a characteristic feature of Surface Plasmon Resonance (SPR) peak for silver nanoparticles. The silver nanoparticles were characterized with Atomic Force Microscopy (AFM) and Transmission Electron Microscopy (TEM) and found the size ranges from 10 to 50 nm. Further Fourier Transformation Infrared Spectrum (FTIR) revealed that the phenolic groups present in the plant extract were responsible for the reduction of silver nitrate into silver nanoparticles and stabilization of formed silver nanoparticles. Finally antibacterial activities of the silver nanoparticles were checked against Bacillus subtilis, Pseudomonas fluorescens and Klebsiela pneumonia and significant zones of inhibition were found.Current Nanoscience 01/2012; 8(1):125-129. · 1.78 Impact Factor
