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. 2020 Dec 15;15:10199–10213. doi: 10.2147/IJN.S284520

Figure 3.

Figure 3

The photothermal capacity of MNPH2 solution. (A) Concentration-dependent thermal infrared images of MNPH2 solutions within 5 min under 808 nm laser irradiation (0.5 W/cm2). (B) Temperature change curves of a series of MNPH2 solutions with different concentrations recorded with 808 nm laser irradiation (0.5 W/cm2). (C) Temperature variation curves of MNPH2 solutions under different laser power densities (808 nm, 0.25, 0.5, 0.75, and 1.0 W/cm2) at 100 μg/mL. (D) The heating and cooling curves of MNPH2 aqueous solution (100 μg/mL) measured with irradiation of 808 nm laser (0.5 W/cm2). (E) The linear time data and –lnθ acquired from the cooling period of Figure 3D. The time constant for heat transfer of the MNPH2 was calculated to be 243 s. (F) Photothermal stability of MNPH2 (100 μg/mL) in DI water upon irradiation for six cycles (808 nm, 0.5 W/cm2).