Fig. 6

A In vivo thermal infrared images of mice after different treatments. Mice were treated with PBS or Cu₃SnS₄ NFs followed by NIR laser irradiation for different times. B Corresponding temperature change of wounds of mice after treatment with PBS or Cu₃SnS₄ NFs followed by 808 nm laser irradiation. C Scheme of the photo-activated antibacterial treatment processes. D Representative photographic images of ICR mice with MRSA-infected wounds after different treatments for 8 days: control (treated with PBS), NIR (treated with PBS followed by NIR irradiation), Cu₃SnS₄ (treated with Cu₃SnS₄ NFs), and Cu₃SnS₄ + NIR (treated with Cu₃SnS₄ NFs followed by NIR irradiation). E Corresponding changes of wound size in each group during the 8 days’ treatments. Data are presented as means ± SDs (n = 6). ^*p < 0.05, ^***p < 0.001. F H&E staining of the dermal wound tissues on day 8 after different treatments. For NIR irradiation, 808 nm laser (1.0 W cm⁻², 10 min) were used