Photothermal Effect of Superparamagnetic Fe₃O₄ Nanoparticles Irradiated by Near-Infrared Laser

Figure 4

(a) Temperature increase of Fe₃O₄ NP suspensions with different concentrations (laser wavelength: 808 nm, laser power density: 1 W/cm²). (b) Irradiated by a laser with different power densities (concentration: 0.1 mg/mL, laser wavelength: 808 nm) and (c) irradiated by lasers with different wavelengths (concentration: 0.1 mg/mL, laser power density: 1 W/cm²).

(a)

(b)

(c)