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The absorption and dissipation of light energy at 808 nm by these SP@NPs. (A) Fluorescence spectra of NPTT, NPDPT, NPTVT, and NPPhT ([SP] = 10 µg/mL) upon excitation at 808 nm. (B) Photothermal conversion efficiency of NPTT, NPDPT, NPTVT, and NPPhT. (C) Absorption spectra of these SP@NPs with different A2 units ([SP] = 5.0 μg/mL). (D) Mass extinction coefficient of these SP@NPs at 808 nm.
