Fig. 11From: Green synthesis, characterization, antibacterial and photocatalytic activity of black cupric oxide nanoparticlesAntibacterial activity of CuO-NPs against selected Gram-negative and Gram-positive bacteria in a nutrient agar medium depicting zones of inhibition (where T.D. = test drug; S.D. = standard drug; and N.C. = negative control)Back to article page