Fig. 3. Biotoxicity of the PEG@NCPs. (a) Cell viability subjected to the PEG@NCPs at different concentrations for 10 h. (b) The body weight trends of the mice within 3 weeks after injection with saline solution (control) or the PEG@NCPs (20 μmol Gd kg–1). (c) Histological changes of the lung, liver, spleen, kidney, intestine, and heart 1 week after injection with saline solution (control) and the PEG@NCPs. Scale bars: 100 μm.
