Fig. 4

A CLSM images of HepG2 cells treated with Pd@MOF-525@HA (100 µg/mL) and detect the generation of ¹O₂ using SOSG (Laser: 800 nm, 1 W cm^− 2; US: 1.2 W cm^− 2; H₂O₂: 100 µM; Scale bar: 25 μm). B CLSM images of HepG2 cells treated with Pd@MOF-525@HA (100 µg/mL) and detect the generation of ∙OH using APF (AA: ascorbic acid, an inhibitor of ∙OH, 25 µM; H₂O₂: 100 µM; scale bar: 25 μm). C One-photon (458 nm, 0.2 W cm^− 2) and D Two-photon (800 nm, 0.2 W cm^− 2) 3D fluorescence images of tissue section