Evaluation of the Effect of the Size of Ramalina fraxinea Based Ag NPs on the Antimicrobial Activity

For the first time in this study, effect of nanoparticles (NP) sizes on antimicrobial activity Ag NPs different obtained by reaction Ramalina fraxinea(R. fraxinea) extract and silver nitrate (AgNO3) at concentrations was evaluated. purpose, characteristic light absorption points, charge surface were determined ultraviolet-visible spectroscopy (UV-Vis), zeta potential, hydrodynamic diameters dynamic scattering (DLS) analysis, morphology, scanning electron microscope (SEM) analysis. The crystal structures confirmed X-ray diffraction (XRD) analysis map. functional groups R. fraxinea extract, which plays an active role synthesis NP, revealed peaks Fourier transform infrared (FT-IR) As a result characterization tests, average diameter increased from 14 nm to 48 with increase NO3 concentration used NP (from 10-3 M 5*10-2 M). against Staphylococcus aureus, Escherichia coli, Candida albicans strains evaluated depending size NPs. small-sized studied quite effective compared large-sized result, it is seen that synthesized using biologically inexpensive eco friendly method exhibit size. It thought study data will be guide for nanotechnology biomedical field studies.