Green synthesis characterization and biomedical applications of silver and gold nanoparticles

Abstract

The synthesis and characterization of nanomaterials by using plant newlineextracts is an emerging field of nanotechnology with an extensive newlineapplications in the fields of physics chemistry biology and medicine With newlinethe development of several chemical synthesis techniques the concern for newlineenvironmental contamination is also heightened as the chemical synthesis newlineprotocols need some toxic chemicals for synthesis Integrative conventional newlinebiotechnology and hybrid nanotechnology lead to nano biotechnology which newlineutilizes original concepts and natural materials for manufacturing nanoscale newlinedevices under the control of green chemistry principles In general living newlineorganisms traditionally represent a good model for engineers to learn from newlinebiological constituents with the optimal functionality of our interests having newlinebeen used in the creation of nano biotechnology products Synthesis of newlinemetallic nanoparticles by using plant extracts is an attractive one particularly newlineat medicinal applications because of advantage of certain properties such as newlinebiodegradability environmental friendly high biocompatibility with low newlinetoxicity when compared with conventional synthesis methods newlineThe present study is one such attempt with a novel green approach newlinefor the synthesis characterization biomedical applications and thermal newlinedecomposition studies of silver and gold nanoparticles using Senna siamea newlineplant seed aqueous extract under ambient conditions An extensive qualitative newlineand quantitative comparisons of the plant mediated synthesized nanoparticles newlinebetween the different plants were measured The reaction mixture turned newlinebrownish gray color for silver nanoparticles and violet for gold nanoparticles newlineafter 3 hours of incubation period Obtained nanoparticles were confirmed by newlinesurface plasmon spectra using UVvis spectrophotometer around 470 nm for newlinesilver and 520 nm for gold nanoparticles newlineFourier Transform Infrared Spectroscopy FTIR study confirmed newlinethat the synthesized nanoparticles were reduced and capped by the plant seed newlinechemicals only both silver and gold newlinen