Fig. 5

a UV-vis spectra of PDA and PDA@PMAA aqueous dispersion at a concentration of 100 μg mL⁻¹. b Photothermal effect of PDA and PDA@PMAA aqueous dispersion at a concentration of 100 μg mL⁻¹ were measured by laser irradiation (λ = 808 nm, 5 W cm⁻²)