  We discuss about the antibacterial activities of copper nanoparticles on both
Gram negative and Gram positive bacteria in this investigation. First time, we
increase its antibacterial activities by using electrical power while on
electrolysis synthesis and it is confirmed from its more antibacterial
activities (For Escherichia coli bacteria). We investigate the changes of
surface area to volume ratio of copper nanoparticles prepared in two different
methods and its effects on antibacterial activities. We note that slight change
of surface area to volume ratio results in the enhancement of its antibacterial
activities.
