Fig. 2
(A) Schematic illustration of the preperation and functionality of MP-MENP. (B) TEM image and (C) HAADF-STEM-EDX mapping of MP-MENP. (D) Size distribution and (E) UV-vis-NIR − vis spectra of MENP or MP-MENP in deionized water. (F) The temperature variation and (G) thermographic images of MP-MENP upon 808 nm laser irradiation (2 W/cm2, 5 min). (H) PA imaging signals of MP-MENP with different concentrations. The inset shows the corresponding PA images of MP-MENP. The linear relationship for the (I) r1 and (J) r2 relaxivities of MP-MENP as a function of Mn concentration