TL;DR: Using Brown alga (Bifurcaria bifurcata) in the biosynthesis of copper oxide nanoparticles of dimensions five–45 nm is claimed for The 1st time and these nanoparticles were found to exhibit high antibacterial exercise against two diverse strains of bacteria. These two service units offer academic establishments and industrial businesses with https://www.directivepublications.org/journal-of-applied-nanoscience/