Fig. 5

A–C Colony-Forming Unit (CFU) counts of bacteria approximately 24 h after addition of the scaffolds composed of bacterial growth substrate (“control “), bimetallic NPs (“Au–Ag “), AuNP synthesized at pH9, at pH3, and of a scaffold without NPs (“pristine scaffold “). The graphs present results acquired with and without laser irradiation (“treated “ and untreated “, repectively), performed on E. coli (A), S. epidermidis (B) and P. aeruginosa (C) assays. D CFU analysis of P. aeruginosa biofilm. All samples that contained NPs showed destruction of the BFs underneath them and bacterial death compared to the controls