Fig. 2

A At different concentrations (0.25, 0.5, 0.75, 1.0 and 1.25 mg/mL), photothermal curves of FTCPNPs aqueous solution with 808 nm laser irradiation (2.0 W/cm²). B FTCPNPs aqueous solution photothermal curves at increased power densities (0.5, 1.0, 1.5, and 2.0 W/cm²). C Different components of FTCPNPs and their photothermal performance. D Infrared thermal images of FTCPNPs irradiated with an 808 nm laser at different concentrations (0.25, 0.5, 0.75, 1.0, and 1.25 mg/mL). E FTCPNPs aqueous solution photothermal curves for 5 heating/cooling cycles. F FTCPNPs aqueous solution (1.0 mg/mL) was exposed to 808 nm laser irradiation (2.0 W/cm²) for 600 s followed by cooling. G Based on the cooling period, the time constant for heat transfer was calculated. H, I Intracellular uptake of FTCPNPs as observed by CLSM and quantified by flow cytometry analysis. Scale bar: 50 μm