Fig. 2
Photothermal effect of biomimetic PB nanotherapeutics. a Temperature profiles of different concentrations of PB NPs under 785-nm laser irradiation (1 W/cm2) for 5 min. b Temperature profiles of different concentrations of PB@M NPs under 785-nm laser irradiation (1 W/cm2) for 5 min. c Photostability of PB@M NPs (150 µg/mL) under 785-nm laser irradiation (1 W/cm2) for 5 cycles. d Representative photothermal images of 45 µg/mL PB NPs and 37 µg/mL PB@M NPs under 785-nm laser irradiation (1 W/cm2) at various irradiation time points. e DOX release from PB@D@M NPs at pH 7.4 and 5.0 without or with 785-nm laser irradiation (1 W/cm2) for 5 min. f Fluorescent images of intracellular DOX release from PB@D@M NPs without or with 785-nm laser irradiation (1 W/cm2) for 5 min. Scale bar: 50 μm