Characterization of Silver Nanoparticles Prepared by Cold Plasma Reaction

Abstract

In this study, varied exposure period of an atmospheric pressure non-thermal plasma technique were used to prepare silver nanoparticles (Ag NPs). The structural, morphological and spectroscopic characteristics of the Ag nanoparticles were examined. Surface plasmon resonance (SPR) centers at 416, 417, 421, 428 and 433nm were observed in the synthesized Ag nanoparticles. These nanoparticles were face-centered cubic crystals with crystalline composition. The average crystallite size of the Ag nanoparticles was 30.9 nm. Additionally, the formation of spherical Ag particles with sizes within 17-55nm was confirmed. The plasma exposure period, according to the results, is a key factor in changing the attributes of silver nanoparticles such as surface area, grain size, and optical stability. The well diffusion method and the MIC method were used to examine the biological activity of synthetic Ag nanoparticles against various harmful bacteria (Staphylococcus aureus, E. coli). When using the well diffusion approach to combat both Gram-positive and Gram-negative bacteria, the Ag nanoparticles demonstrated greater antibacterial activity.