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Bacterial cell killing of various formulations against S. aureus investigated 0 h (striped bars) and 24 h (solid bars) following treatment: (1) no treatment; (2) 0.4 nM AuNC; (3) 0.4 nM AuNC@PDA; (4) laser irradiation; (5) 0.4 nM AuNC@PDA and laser irradiation. Killing was assessed at 0 h (striped bars) and 24 h (solid bars) post treatment. Black bars indicate non-irradiated groups, and red bars indicate irradiated groups.
