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(a) Photodynamic activities of 10-nm GaHb–AuNPs (blue) and 40-nm GaHb–AgNPs (purple) on a per weight basis against S. aureus, following 15-min exposure to a 20-W CFL (λmax = 406 nm). Activities for 10-nm GaHb–AgNPs (red) and GaHb–NPs without light (open symbols) included for comparison. (b) Photodynamic activities of various species (red bars) at equal loadings of GaPpIX (78 ng/mL). Dark toxicities (grey bars) included for comparison.
