Figure 8.

Cytotoxicity and cell migration evaluation. (a) Proliferation of L929 cells co-cultured with different groups (blank, PLLA, CN/PLLA, and CN-MnO₂/PLLA) for 1, 2, and 3 days. (b) Live/dead fluorescence staining images of L929 cells co-cultured with different groups (blank, PLLA, CN/PLLA, and CN-MnO₂/PLLA) at 3 days. Scale bar: 200 μm. (c) Infrared thermal images of L929 cells in different groups (blank, PLLA, CN/PLLA, and CN-MnO₂/PLLA) after irradiation with NIR light for 30 min. Scale bar: 700 mm. Optical images of the wound healing of L929 cells (d) without or (e) with NIR light irradiation after incubation with different groups (blank, PLLA, CN/PLLA, and CN-MnO₂/PLLA) for 0 and 24 h. Scale bar: 200 μm. The relative wound area of L929 cells (f) without or (g) with NIR light irradiation after incubation with different groups (blank, PLLA, CN/PLLA, and CN-MnO₂/PLLA) for 0 and 24 h. The significant difference represent ^*p < 0.05 compare with Blank+NIR at 24 h. NIR near-infrared, OD optical density, PLLA poly-L-lactic acid, CN graphitic phase carbon nitride, MnO₂ manganese dioxide