Cu nanoparticles with an average particle diameter of 5.3 nm were studied.
Cu nanoparticles showed excellent antimicrobial activities toward different kinds of microorganisms (E. coli, S. aureus, and C. albicans).
The AFM results demonstrated distinct morphological changes in the cells wall of all tested strains.
Copper (Cu) hydrosol containing small nanoparticles (NPs) (~5 nm) with narrow size distribution were used to investigate antimicrobial activity toward representative microorganisms of public concern (Escherichia coli, Staphylococcus aureus and Candida albicans). Microbial reduction measurements were performed as a function of CuNPs concentration, after 2 h of their contact. Surface and morphological alterations of the strains exposed to the Cu NPs were studied on the cellular level using atomic force microscope (AFM).