Fig. 2.

Degradation, monitor release, and photothermal properties of the materials. (A) TEM images of the MD degraded in PBS at different pH values with or without 10 mM GSH. Scale bar, 50 nm. (B–D) The cumulative release of the Cu₂S nanoparticles from the MD in PBS at different pH values was treated with different concentrations of GSH. (E) Infrared thermographic maps of different materials with various concentrations after 5 min of NIR-II laser irradiation (1 W/cm²). (F) Photothermal heating curves of different materials with various concentrations. (G) Temperature curves of the MCD nanoparticles treated with different power intensities. (H) Temperature variation of the MCD nanoparticles with 5 cycles of irradiation.