Fig. 2
(a) UV − vis absorption spectra for CR (dispersed in DMSO, 12.5 µg/mL) and CR@E8-EVs (dispersed in water, 12.5 µg/mL). Insets are photographs of CR and CR@E8-EVs dispersion taken under bright light. (b) IR thermal images of the CR@E8-EVs (50 µg/mL based on CR) under 808 nm laser irradiation (0.8 W/cm2) for different durations. (c) Temperature variation of CR@E8-EVs with different laser power density (50 µg/mL dose). (d) Temperature variation of CR@E8-EVs with different concentrations treated with 808 nm, 0.8 W/cm2. (e) Photothermal curves for CR and CR@E8-EVs subjected to 808 nm laser irradiation on/off cycles at 0.8 W/cm2. (f) Absorption spectra and photos (insets) of CR@E8-EVs before and after 808 nm laser irradiation cycles (0.8 W/cm2)