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(a) Photothermal properties of P-PPor NPs at various concentrations upon 808 nm laser (1.5 W/cm2) irradiation; (b) Photothermal properties of P-PPor NPs upon laser with different power densities; (c) Photothermal properties of P-PPor NPs after five on/off irradiation cycles; (d) Linear cooling time data versus ln(θ) of P-PPor NPs in the cooling period; Absorption spectra before and after radiation of ICG (e) and P-PPor NPs (f).
