Characterization of Biologically Synthesised Silver Nanoparticles from Euphorbia hirta

Nanotechnology is the design, characterization, production and application of structures, devices and systems by controlling shape and size at the nanoscale. It involves the production, manipulation and use of materials ranging in size from less than a micron to that of individual atoms from not only chemical approaches but also biological materials. Silver nanoparticles were successfully synthesized from AgNo3 through a simple green and natural route using the aqueous extract of shade dried leaves of Euphorbia hirta (L). Nano particle synthesis is proved under UVVis absorption spectroscopy. By using plant extract, silver nano particles synthesized which are quite stable and no visible changes are observed even after a month or so, if the nanoparticle solutions are kept in light proof condition. As nanoparticles have great application in medical world like gene therapy, cancer therapy, drug delivery etc. So medical world also easily accept the plant world for nanoparticle synthesis and welcome the higher plants for their potentiality of synthesis of non polluted, environmentally acceptable, safety for human health nanoparticles. Physical evolutions by Field Emission Scanning Electron Microscopy (FESEM) were used to differentiate the Ag nanoparticles shape and structures. FESEM image divulges that silver nanoparticles are quite poly dispersed, the size ranging from 5.1642d.nm to 98.65d.nm measured by Diffuse Light Scattering (DLS) method. That is smaller than the nanometer. To that the plant E. hirta having the silver nanoparticles in the globular in shape .The move towards extracellular synthesis of Ag nanoparticles using dried biomass appears to be cost effective, ecological to that of conservative methods of green nanoparticles synthesis.