The effect of silver nanoparticles toward properties and antibacterial activity of silver-alginate nanocomposite films

Preparation of silver-alginate nanocomposite films as an antibacterial material has been carried out through the casting method colloidal silver-alginate. Colloidal was made by chemical reduction AgNO 3 precursor salts using microwave irradiation with alginate a stabilizer and reducing agent NaOH accelerator. The appearance brownish yellow color, due to addition variation , localized surface plasmon resonance (LSPR) phenomenon were identified UV-Vis spectrophotometer, indicating that silver nanoparticles have formed. properties obtained then examined. shape size distribution particles determined based on image transmission electron microscopy (TEM), (FTIR), mechanical, crystallinity (XRD), morphology (SEM). Testing activity performed diffusion for gram-positive ( S. aureus MRSA) gram-negative E. coli ESBL) bacteria. results showed spectrophotometer characterization results, LSPR appeared at absorption peak 401.01–409.00 nm, denoting spherical 3–22 nm Further, presence affected mechanical film, where tensile strength film tended decrease increase in concentration while increased. Next, SEM had rough porous structure. against coli, ESBL, MRSA. nanoparticles.