Green Ultrasound-Assisted Synthesis of Surface-Decorated Nanoparticles of FeO with Au and Ag: Study of the Antifungal and Antibacterial Activity.

This work proposes a sonochemical biosynthesis of magnetoplasmonic nanostructures of FeO decorated with Au and Ag. The magnetoplasmonic systems, such as FeO and FeO-Ag, were characterized structurally and magnetically. The structural characterizations reveal the magnetite structures as the primary phase. Noble metals, such as Au and Ag, are present in the sample, resulting in a structure-decorated type. The magnetic measurements indicate the superparamagnetic behavior of the FeO-Ag and FeO-Au nanostructures. The characterizations were carried out by X-ray diffraction and scanning electron microscopy. Complementarily, antibacterial and antifungal assays were carried out to evaluate the potential properties and future applications in biomedicine.