Green Ultrasound-Assisted Synthesis of Surface-Decorated Nanoparticles of Fe(3)O(4) with Au and Ag: Study of the Antifungal and Antibacterial Activity

This work proposes a sonochemical biosynthesis of magnetoplasmonic nanostructures of Fe(3)O(4) decorated with Au and Ag. The magnetoplasmonic systems, such as Fe(3)O(4) and Fe(3)O(4)-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 Fe(3)O(4)-Ag and Fe(3)O(4)-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.