Green Synthesis and Characterization of Silver Nano Particles

[摘要] Nanotechnology is getting an incredible drive due to the potential of manipulating metals into their nano-size particles. The synthesis and characterization of nanoparticles using green technology have many applications. The wet chemical techniques used presently in the synthesis of nanoparticles are deleterious along with flammable conditions. Silver nanoparticles have the capability of killing microbes effectively. This paper explains the green technology and pollution-free methodology for synthesizing silver particles at the nanoscale using 1mM silver nitrate solution from the extracts of Carica papaya, Emblica officianalis, Azadirachta indica, and Cocos nucifera. When the silver nanoparticles are synthesized the solution turns to brownish-yellow color. The tools used in the characterization of silver nanoparticles are Ultra Violet - Visible absorption Spectroscopy and Field emission Scanning Electron Microscopy. The solutions with silver nanoparticles showed the maximum absorption at 450 nm with Ultra Violet - Visible spectroscopy. It is found that C. Papaya and E. oficianalis showed the maximum absorbance of 0.578 and 0.59 respectively at 450 nm. The average range of the produced silver nanoparticles is analyzed to be 5 – 70 nm with FESEM and the shape is examined to be spherical.

[学科分类] 数学（综合）

[关键词] Characterization;Green technology;Metal;Nanotechnology;Silver Nanoparticles