Marvit Osman Widdatallah Omer
University of Medical Sciences and Technology, Sudan
Title: Silver and gold nanoparticles using green method of synthesis and ealuation of their antibacterial activity
Biography
Biography: Marvit Osman Widdatallah Omer
Abstract
Synthesis of silver nanoparticles and Gold nanoparticles using seeds of Nigella sativa and black tea as a capping agents were evaluated in those studies. Different concentrations of the aqueous extract of plants exrtract with silver nitrate solution and Gold salt solutions were exposed to sunlight; as a force for acceleration of the formulation. Then the nanoparticles were characterized by UV-Vis, scanning electron microscope (SEM) and X-ray diffraction (XRD) techniques. Antibacterial activities of the nanoparticles were investigated against Staphylococcus aureus and Escherichia coli as represent the most common types of pathogenic bacteria by the disc diffusion method. The characterization of nanoparticles were detected by the change in color to yellow-brown in silver NPs and pink-purple in Gold NPs which indicated the formulation of nanoparticles and another techniques according to the different in the capping agents in the plants extracts. Different shapes within range of nanoscale were detected using SEM and XRD techniques. The finding suggests that nanoparticles may be effectively used as antibacterial agent as being a future for many fields espically in area of bacterial resistance toward antibiotics.