Dense coating of surface mounted Cu2O nanoparticles upon silk fibers under ultrasound irradiation with antibacterial activity

The growth of Cu2O nanoparticles on silk fibers was achieved under ultrasound irradiation. The effect of temperature, reaction time, ultrasound irradiation and solvent in growth of the Cu2O nanoparticles upon fiber has been studied. These systems depicted a decrease in the size accompanying a decrease in the reaction time. Particle sizes and morphology of nanoparticle depend on power of ultrasound irradiation. Results show that in presence of ultrasound radiation, particle sizes are in a very low range. The susceptibility of the microorganisms to Cu2O upon fiber was determined by minimum inhibitory concentration (MIC) using micro dilution method and disk diffusion method. Results suggest that the Cu2O nanoparticles on silk fibers have antibacterial activity. The Cu2O nanoparticles upon fibers were characterized with X-ray powder diffraction (XRPD) and scanning electron microscopy (SEM). XRPD analyses indicated that the prepared Cu2O nanoparticles on silk fibers were crystalline.