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(A) Viability of Saos-2 cells incubated with different concentrations of Cu-TCPP MOF nanosheets for 24 h. (B) Cancer cell apoptosis after the indicated treatment with Cu-TCPP MOF nanosheets (1 mg/mL). P values: ***p < 0.001, **p < 0.01, or *p < 0.05. (C) Confocal images of calcein AM (green, live cells) and propidium iodide (red, dead cells) co-stained cells after incubation with Cu-TCPP MOF nanosheets for phototherapy. Scale bar: 20 μm.
