Fig. 7: Biocompatible and photothermal antibacterial performance of PMPPF electrical device.

a Cell relative viability of NIH-3T3 cells treated by different samples (Error bars: s. d., n = 6). Typical fluorescence microscopy image of mouse cells (NIH-3T3) after incubation for 1 day on the substrate of b Control, c PMP and d PMPP (Scale bars: 10 μm). Survivability of e S. aureus and g E. coli after treatment with PMPPF under different power densities of IR laser. (Irradiation time = 20 min). Survivability of f S. aureus and h E. coli after treatment with PMPPF under different irradiation times of IR laser. (Power density = 0.27 W·cm−2). i Digital images of agar plates used for the growth of E. coli and S. aureus exposed to PMPPF for 20 min under conditions with or without NIR (808 nm) laser irradiation. SEM images of untreated j E. coli and l S. aureus. SEM images of k E. coli and m S. aureus after treated with PMPPF. (Scale bars: 2 μm).