Fig. 3From: Investigations into the antibacterial behavior of copper nanoparticles against Escherichia coli Optical density as a function of time in the solution studies with varying concentrations of copper nanoparticles (µg Cu0/mL): ■ 0, ● 20, ▲ 40, ▼ 60, ♦ 80, ◄ 100Back to article page