title: Green synthesis and spectral characterization of silver nanoparticles from Lakshmi tulasi (Ocimum sanctum) leaf extract.
abstract: A simple method for the green synthesis of silver nanoparticles (AgNPs) using aqueous extract of Lakshmi tulasi (Ocimum sanctum) leaf as a reducing and stabilizing agent. AgNPs were rapidly synthesized using aqueous extract of tulasi leaf with AgNO(3) solution within 15 min. The green synthesized AgNPs were characterized using physic-chemical techniques viz., UV-Vis, X-ray diffraction (XRD), scanning electron microscope (SEM) coupled with X-ray energy dispersive spectroscopy (EDX) and Fourier transform-infrared spectroscopy (FT-IR). Characterization data reveals that the particles were crystalline in nature and triangle shaped with an average size of 42 nm. The zeta potential of AgNPs were found to be -55.0 mV. This large negative zeta potential value indicates repulsion among AgNPs and their dispersion stability.
authors.affiliation: DST-PURSE Centre, Sri Venkateswara University, Tirupati 517 502, AP, India. subbaraophd@gmail.com
authors.forename: Y
authors.initials: Y
authors.lastname: Subba Rao
authors.forename: Venkata S
authors.initials: VS
authors.lastname: Kotakadi
authors.forename: T N V K V
authors.initials: TN
authors.lastname: Prasad
authors.forename: A V
authors.initials: AV
authors.lastname: Reddy
authors.forename: D V R
authors.initials: DV
authors.lastname: Sai Gopal
mesh_terms: D055772:Green Chemistry Technology / Q000191:economics / Q000379:methods*; D053768:Metal Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D031339:Ocimum / Q000737:chemistry*; D010084:Oxidation-Reduction; D010936:Plant Extracts / Q000737:chemistry*; D018515:Plant Leaves / Q000737:chemistry*; D012834:Silver / Q000737:chemistry*; D013052:Spectrometry, X-Ray Emission; D013056:Spectrophotometry, Ultraviolet; D017550:Spectroscopy, Fourier Transform Infrared; D014961:X-Ray Diffraction
chemical_list: D010936:Plant Extracts; D012834:Silver