Fig. 1
a Elemental mappings of Cu and Gd elements for HMON@CuS/Gd NPs. b TEM images of biodegradable HMON@CuS/Gd NPs immersed in 10 mM GSH aqueous solution for 7 days and 14 days. c, d T1-weighted MRI images of HMON@CuS/Gd at various concentrations (left) and the relative MR signal intensities (right). e, f The temperature increase curve induced by different concentrations of HMON@CuS/Gd aqueous solutions and PBS under NIR irradiation (0.8 W/cm2, 5 min). g PTT stability of HMON@CuS/Gd NPs under NIR laser irradiation (0.8 W/cm2, 5 min). h The production of singlet oxygen by the HMON@CuS/Gd NPs with or without NIR irradiation (0.8 W/cm2, 5 min). Data are shown as mean ± SD, n = 3