Figure 4.

Confocal images of a fibroblast-DS Red E. coli biofilm co-culture model incubated with switchable nanozyme NZ1 (400 nM) and alloc-rhodamine (non-fluorescent, 100 μM) for 1 h. a) DS Red b) Rhodamine 110 and c) merged channels d) Quantitative analysis of fluorescence intensity observed in the images of non-infected cells (cells only) and cells infected with biofilm (co-culture). Scale bar is 20 μm.