Pterocladiella capillacea–Stabilized Silver Nanoparticles as a Green Approach toward Antibacterial Biomaterials

Silver nanoparticles (AgNPs) synthesized with aqueous extracts of Pterocladiella capillacea presented antibacterial activity against Staphylococcus aureus. AgNP preparation was optimized, leading to elongated spheres with a mean diameter of 17.42 nm. The minimum inhibitory concentration (MIC) was 0.74 μgAg mL−1, the lowest reported up to date for algae-stabilized AgNPs.