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ROS and photothermal detection for P-IR890. (A) The ROS detection with DPBF for PBS group under irradiation of a 850 nm laser. (B) The ROS detection with DPBF for P-IR890 group under irradiation of a 850 nm laser. (C) The variation of relative absorbance at 420 nm for PBS group, IR890 group and P-IR890 group. (D) Thermal images recorded from P-IR890 with different concentrations. (E) The corresponding heating curve for D.
