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(a) Photothermal pictures of the treatment with TCPR NPs (50 µg mL−1, 200 µL), which were irradiated with 1060 nm laser (1 W cm−2) at the tumor sites for 10 min. (b) Corresponding temperature change in (a). (c) Copper red acid staining of tumor tissues. (d) PA images of mice at various time points after the intravenous injection of TCPR NPs. (e) Corresponding PA signal intensities in (d) (***p < 0.001).
