Resumen de Copper at silica core – shell nanoparticles as antibacterial agents by sol-gel chemical methods
Alaa F. Hashim Al-Ajeeli, Khalid Hamdi Razeg, Fuad Tariq Ibrahim
Core-shell Cu@sio2 nanoparticles were created by a chemical reaction in a sol gel, and their ability to inhibit S. aureus and E. coli bacteria was tested, when synthesized and characterized using ultraviolet-visible spectroscopy, a copper band could be seen before and after encapsulation at wavelengths of 625 nanometers and 635 nanometers, which are surface plasmonic resonant frequency bands, respectively. The production of Cu @Sio2 core shell nanoparticles was further confirmed using field emission scanning electron microscope (FESEM) pictures. The core shell nanoparticles have a mean size of 66 nanometers and a spherical shape, as shown in TEM. The X-ray diffraction patterns for the nanoparticles, which show face-centered cubic (FCC) of copper, match the crystal structure of Cu@sio2 we discovered using fourier transform infrared (FT-IR) spectroscopy, the fourier transform infrared interaction between the silica and the synthesized copper NPs was investigated. This revealed the capping of the CuNPs by SiO2. The inhibition zone was evident as a result of the activities of these compounds (14, 14, 16, and 20) and (24, 24, 28, and 30) against Escherichia coli bacteria and Staphylococcus aureus bacteria, respectively.
