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Stability of the PT effect and PA properties of these SP@NPs. (A) Temperature elevation of SP@NPs (30.0 µg/mL) over four laser on/off cycles of NIR irradiation (808 nm, 2.0 W/cm2, 15 min). (B) Thermal images of SP@NPs as a function of time upon exposure to the NIR laser (808 nm, 2.0 W/cm2). (C) PA amplitudes of SP@NPs solution excited by pulsed laser at 808 nm as a function of irradiation time.
