Fig. 4
A The thermographic images of AZGL (50 μg/mL) at different times under 1.0 W/cm2 980 nm laser irradiation. B The photothermal performance of the AZGL with different concentrations irradiated for 10 min by 1.0 W/cm2 980 nm laser and the same mass of AuNS (30 μg/mL) as in AZGL as a comparison. C The temperature-increasing curves of AZGL (50 μg/mL) exposed to 980 nm laser irradiation for 10 min at varied power densities. D Heating and cooling circles for testing the stability of AZGL (50 μg/mL) exposed to 1.0 W/cm2 980 nm laser irradiation. E Linear time data versus − ln(θ) obtained from the cooling period of AZGL