Antibacterial Activity of Partially Oxidized Ag/Au Nanoparticles against the Oral Pathogen Porphyromonas gingivalis W83

Figure 2

Growth curves of P. gingivalis W83 showing the antibacterial activities of anaerobically prepared nanoparticles. Bacterial growth over a 24-hour period was assessed by measuring the absorbance of cultures at 600 nm for specific intervals. P. gingivalis W83 was inoculated with anaerobically prepared (≈0.3 nM, 500 μL) glutathione capped Ag and Ag/Au ((I) Au : Ag = ; (II) Au : Ag = ; (III) Au : Ag = ) nanoparticles in 5 mL total volume. Glutathione capping was done using method II. Error bars represent the standard deviation of three experiments.