Green Synthesis of Silver Nanoparticles ‎and Its Antibacterial Activity using the ‎Flower Extract of Senna Siamea

In recent science Nanotechnology is a major concern for the researchers. Nanotechnology deals with the nanoparticles having a size of 1-100 nm in one dimension due to its unique size, orientation, physical and chemical properties, which are reportedly shown to change the performance of any other material which is in contact with these particles. These particles can be synthesized by chemical, biological and physical methods. But the biological approach is the most prominent approach of preparation because this method is safer than the other methods, eco-friendly, rapid and less toxic. The green synthesis was done by using the solutions of flower extract of Senna Siamea and AgNO3. Silver was chosen for this research due to its remarkable properties. A fixed ratio of plant extract to metal ion was prepared, the solution was then heated at 800W for 10 minutes, using microwave and the colour change was observed which proved the formation of nanoparticles. The nanoparticles were visualized by UV-vis spectrophotometer, which indicated that the maximum absorbance of Silver nanoparticles (AgNPs) was at 443.2 nm. Also, AgNPs were characterized by Fourier transform infrared spectroscopy (FTIR) and scanning electron microscope (SEM) and the nanoparticles obtained are spherical in shape. The synthesized silver nanoparticle has a strong bactericidal effect against Staphylococcus aurues and Eschericia coli.