Fig. 12From: Visible light-regulated cationic polymer coupled with photodynamic inactivation as an effective tool for pathogen and biofilm eliminationa The relative fluorescence emission intensity of NPN for E. coli suspensions treated with Ce6-TPP-PEI, TPP-PEI and free Ce6 light radiation or not. PBS was set as the control group. Data are presented as mean ± SD (n = 3). b TEM images of E. coli cells after being treated with Ce6-TPP-PEI, TPP-PEI and free Ce6 light radiation, Ce6-TPP-PEI (A), TPP-PEI (B), free Ce6 (C) and PBS (D), PBS was set as the control group. The concentration of Ce6 was 12 µg/mL (Scale bar: 500 nm). Arrows indicate the outer membrane and cytoplasmic membrane of E. coliBack to article page