Neeraj R Prasad
Shivaji University, India
Title: Extracellular bio-mimetic green synthesis of multi-applicative silver nanoparticles using Nicotiana tabacum leaf extract
Biography
Biography: Neeraj R Prasad
Abstract
The development of rapid method for green synthesis of nanomaterials is day by day becoming popular among nanotechnologists. In the present study the author has reported synthesis of silver nanoparticles at room temperature using N. Tabacum leaf extract. The synthesized nanoparticles have been found to be stable for several months. UV- Visible spectroscopic analysis carried out revealed the formation of silver nanoparticles in reaction mixture. Similarly, the X-ray diffraction analysis confirmed the formation of silver nanoparticles. SEM, and TEM imaging unveiled the structural morphology of synthesised nanoparticles to be spherical, non-uniform, and polydispersed. EDX analysis of nanoparticles indicated the presence of elemental silver. The synthesized nanoparticle is multi-applicative and showing potential activity against gram negative bacterium Salmonella typhimorium. Synthesized AgNPs can be used for variety of applications such as Antifungal, Wound Healing, Textile Nanocoating, efficient catalyst for organic transformation and dye degradation etc. In near future, silver nanoparticles synthesized using green methods may be used in treatment of infections caused by highly antibiotic resistant microorganisms. The main mechanism considered for green synthesis is plant assisted reduction due to presence of phytochemicals. The major phytochemicals involved are terpenoids, flavones, ketones, aldehydes, amides and carboxylic acids. Flavones, organic acids and quinones are water soluble phytochemicals that are responsible for the immediate reduction of the ions. Studies have revealed that xerophytes contain emodin, an anthroquinone that undergoes tautomerization, leading to formation of the silver nanoparticles. The major mechanism involved is phyto-chemical assisted reduction of the ions.