Fig. 3. Photothermal heating profiles of BP@PDA–Ce6&TPP NSs in aqueous solution at (a) different concentrations (660 nm, 1.0 W cm^–2, 10 min) and (b) different power densities (50 μg mL^–1). (c) Photothermal response of BP@PDA NSs, BP@PDA–Ce6 NSs, BP@PDA–Ce6&TPP NSs, and Ce6 upon laser illumination (660 nm, 1.0 W cm^–2, 10 min). (d) The absorbance decay of ABDA at 380 nm in the solutions of BP@PDA NSs, BP@PDA–Ce6 NSs, BP@PDA–Ce6&TPP NSs, and Ce6 upon laser illumination (660 nm, 0.10 W cm^–2).