The Antimicrobial Activity of Cu/CuxO Composites Synthesized by Thermal Oxidation of Copper Tablets

The utilization of nanoparticles (NPs) as an alternative to conventional methods to protect surfaces from bacteria is becoming increasingly popular. Nanotechnology has shown promise in providing long-lasting protection. This study focused on synthesizing Cu/CuxO composites on copper surfaces through thermal oxidation at varying temperatures. Optical reflectivity spectra of the composites were measured, and the plasma edges were observed in the range of 526-600 nm. To test the antibacterial properties of the composites, inhibition zone tests were conducted for Staphylococcus aureus. Results showed that the largest zone of inhibition was found in the sample treated at 100ο C. Furthermore, it was discovered that thermal oxidation decreased the ability of copper nanoparticles to inhibit bacteria.