Fig. 2
Photothermal and photoacoustic properties of P-IDI. a Photothermal conversion curves of P-IDI at concentrations 0–200 μg IDI/mL and laser irradiation (1 W/cm2) of 1064 nm and 808 nm. b Photothermal conversion curves of P-IDI (100 μg IDI/mL) under laser irradiation of 1064 nm and 808 nm (0.25–1.5 W/cm2). c Photothermal efficacy of P-IDI (100 μg IDI/mL) under 1064 nm and 808 nm laser irradiation. d Thermal stability of P-IDI (100 μg IDI/mL) upon 1064 nm (1 W/cm2) and 808 nm (1 W/cm2) laser irradiation. e Simulated deep-tissue penetration and photothermal efficacy of P-IDI (200 μg IDI/mL) using chicken breast under 1064 nm (1 W/cm2) and 808 nm (1 W/cm2) laser irradiation. f Temperature increase of P-IDI (200 μg IDI/mL) upon the laser irradiation from (e). g PA phantom images and PA amplitudes of P-IDI upon 808 nm laser irradiation