Fig. 5
From: Persistent luminescence nanoparticles for cancer theranostics application
(Reproduced with permission [64]. Copyright 2014 Nature Publishing Group)
a A scheme for in vivo rechargeable PersL imaging based on LED-activated ZnGa2O4:Cr3+. b Optical image of a 3-tumor-bearing mouse at preinjection, 2Â h post-injection of pre-excited ZGO-PEG, and 4Â h post-injection but re-excited with LED. b PersL intensities of liver and tumors measured from the whole mice at different time points.