TL;DR: Using brown alga (Bifurcaria bifurcata) from the biosynthesis of copper oxide nanoparticles of Proportions 5–45 nm is reported for The very first time and these nanoparticles ended up uncovered to exhibit substantial antibacterial activity against two different strains of micro organism. All content articles printed by MDPI are made https://www.directivepublications.org/journal-of-applied-nanoscience/