Fluorescence and photothermal conversion mediated by near-infrared radiation (NIR) is reported for carbonized polydopamine nanoparticles. Carbonized polydopamine demonstrated excitation-dependent fluorescence emission, together with NIR-responsive photothermal conversion properties. The concentration-dependent photothermal heating from carbonized fluorescent carbon nanoparticlespolydopamine (FNP-pDA) induces hyperthermal killing of both cancer cell lines and bacteria in vitro. Although most of the dopamine mo…
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