Fig. 3
Photothermal performance of Au nanoparticles. a Temperature curve of Au@PDA-PEG-Ab solution (50 μg/mL, 2 mL) irradiated with a 1064-nm laser at a power density of 1.5 W/cm2. The laser was shut off after 30 min of irradiation. b Temperature curves of aqueous dispersion (100 μL) of Au@PDA-PEG-Ab at different concentrations from 10, 25, and 50 to 100 μg/mL under NIR-II laser irradiation (1.0 W/cm2). c Temperature curves of Au@PDA-PEG-Ab solution (50 μg/mL) under NIR-II laser irradiation at different power densities (0.5, 1.0, and 1.5 W/cm2). d Infrared thermal images of aqueous dispersion of Au@PDA, Au@PDA-PEG, and Au@PDA-PEG-Ab (50 μg/mL) upon NIR-II irradiation for 4 min. e Temperature curves of solutions in d. f Photothermal stability of Au@PDA, Au@PDA-PEG, and Au@PDA-PEG-Ab after 5 on/off cycles of laser irradiation (1.0 W/cm2). The concentration of nanoparticle dispersion was 50 μg/mL