Ultrasmall, Ligand-Free Ag Nanoparticles with High Antibacterial Activity Prepared by Pulsed Laser Ablation in Liquid

Figure 4

Growth curves of E. coli (ATCC 25922) at different Ag NPs concentrations. The mean diameter of Ag NPs is (a) 3 nm and (b) 20 nm. Growth curves of vancomycin-intermediate resistant S. aureus (ATCC 700699) in the absence and presence of Ag NPs are shown in panel (c) and (d) where the mean diameter of Ag NPs is 3 nm and 20 nm, respectively.

(a)

(b)

(c)

(d)