Figure 2
MR relaxometry, X-ray attenuation property, photoacoustic property and photothermal performance of the Fe3O4 @ Au-PEI.Ac-PEG-FA NSs.
(a) T2-weighted MR images and (b) linear fitting of 1/T2 of the Fe3O4 @ Au-PEI.Ac-PEG-FA NSs as a function of Fe concentration. (c) CT images and (d) linear fitting of CT values (HU) of the Fe3O4 @ Au-PEI.Ac-PEG-FA NSs at an Au concentration of 4, 8, 16, 32 and 64 mM, respectively. (e) PA images and (f) linear fitting of PA values of the Fe3O4 @ Au-PEI.Ac-PEG-FA NSs at an Au concentration of 0, 0.25, 0.5, 1.0 and 2.0 mM, respectively. (g) Temperature change of water and water containing the Fe3O4 @ Au-PEI.Ac-PEG-FA NSs at varying Au concentrations (1, 2, 4, 10 and 20 mM, respectively) under an 808 nm laser irradiation with the same power density of 1.0 W/cm2 as a function of irradiation time. (h) Temperature change of a water solution containing the Fe3O4 @ Au-PEI.Ac-PEG-FA NSs at an Au concentration of 10 mM under an 808 nm laser irradiation with different power densities (0.25, 0.5, 1.0 and 1.5 W/cm2, respectively) as a function of irradiation time.
