Fig. 2. In vitro evaluation of MB release, O₂ generation, photodynamic and photothermal performance of PMCZ. (A) Time-dependent release profiles of MB from PMCZ (50 μg mL^–1) at different external pH stimuli. (B) ¹O₂ production efficiency of the different samples with different treatments. (1) DPBF; (2) DPBF and 660 nm photoirradiation (100 mW cm^–2); (3) DPBF and H₂O₂ (100 μM); (4) DPBF, H₂O₂ (100 μM) and 660 nm photoirradiation (100 mW cm^–2); (5) DPBF and PMCZ (50 μg mL^–1) at pH 7.4; (6) DPBF and PMCZ (50 μg mL^–1) at pH 5.0; (7) DPBF, PMCZ (50 μg mL^–1) and H₂O₂ (100 μM) at pH 5.0. (C) O₂ generation of these different samples after being incubated with RDPP under different conditions. (1) H₂O₂ (100 μM); (2) H₂O₂ (100 μM) and PDAs (50 μg mL^–1); (3) H₂O₂ (100 μM) and PZ (50 μg mL^–1); (4) H₂O₂ (100 μM) and PMZ (50 μg mL^–1); (5) H₂O₂ (100 μM) and PMCZ (50 μg mL^–1); (6) H₂O₂ (500 μM) and PMCZ (50 μg mL^–1); (7) H₂O₂ (1000 μM) and PMCZ (50 μg mL^–1). (D) Heating curves of PMCZ with different concentrations upon 808 nm photoirradiation (2 W cm^–2).