ELECTRICAL EXPLOSION OF WIRES FOR MANUFACTURING BIMETALLIC ANTIBACTERIAL Ti-Ag AND Fe-Ag NANOPARTICLES

摘要

Using a simultaneous electrical explosion of two twisted wires, bimetallic Ti-Ag and Fe-Ag nanoparticles are synthesized, where the component ratios are 76-24 and 75-25, respectively. The resulting nanoparticles are characterized by the methods of X-ray diffraction analysis, transmission electron microscopy, thermal desorption of nitrogen, and microelectrophoresis. It is found out that the synthesized nanoparticles are mainly structured as Janus-nanoparticles, and in nanopowders they form weakly-bonded aggregates and hard agglomerates, where the particles are connected by silver 'necks'. The negative charge of the particles and their ability towards degassing under ultrasonic action make it possible for the Ti-Ag and Fe-Ag to be used as effective antimicrobial modifiers of water-soluble polymers forming stable gel-like compositions. These compositions possess significant antimicrobial activity against methicillin-resistant Staphylococcus aureus (MRSA) bacteria, which exceeds that of similar compositions containing silver nanoparticles only.