Fig. 3.

Photothermal characterizations of PC₁₀A/DOX/HAuNS hydrogels. a Temperature changes of PC₁₀A/DOX/HAuNS nanogels (PC₁₀A: 0.1% w/w, DOX: 0.8 mg mL⁻¹) containing different concentrations of HAuNS (25, 20, 15, 10, 5, and 0 μg mL⁻¹) under irradiation with an 808 nm laser for 9 min (2.0 W cm⁻²); b photothermal stability of the HAuNS under six irradiation on/off cycles (808 nm, 2.0 W cm⁻²); c temperature changes of the PC₁₀A hydrogel, PC₁₀A/HAuNS hydrogel, and PC₁₀A/DOX/HAuNS hydrogel (PC₁₀A: 3% w/w, DOX: 0.8 mg mL⁻¹, HAuNS: 20 μg mL⁻¹) under irradiation (2.0 W cm⁻²) with an 808 nm laser for 9 min; d temperature changes of the PC₁₀A/DOX/HAuNS nanogel (PC₁₀A: 0.1% w/w, DOX: 0.8 mg mL⁻¹, HAuNS: 20 μg mL⁻¹) under laser irradiation (808 nm, 2.0 W cm⁻²) for 9 min and cooling for 16 min. n = 3