Fig. 9
(a) PL excitation (black line) and emission (red line) spectra of Cr
3+
-doped zinc gallium oxide (ZGO). (b) Persistent luminescence decay curves from Cr
3
+
-doped ZGO obtained at 2 min excitations either by UV light or LED array source. (c) The detection of persistent luminescence nanoparticles after in vivo
activation. Here, the animals intravenously injected with ZGO-OH were irradiated with an orange/red LED source for 2 min, and images were acquired for 3 min
with the photon counting system. The inset shows a persistent luminescence decay curve from the liver. (d) The biodistribution of persistent luminescence
nanoparticles in a tumor-bearing mouse. Images were acquired 4 h after the injection of ZGO-PEG nanoparticles following visible activation of persistent
luminescence with orange/red LED illuminations, which clearly showed the enhanced tumor uptakes as well as the accumulation kinetics. (e) ZGO-NH
2
persistent luminescence NPs used for labelling of RAW cells in vitro (left images) and cells tracking in vivo (right images). Adapted from Maldiney et al. [88]
with permission
Inorganic Fluorescent Nanomaterials
71
(a) PL excitation (black line) and emission (red line) spectra of Cr
3+
-doped zinc gallium oxide (ZGO). (b) Persistent luminescence decay curves from Cr
3
+
-doped ZGO obtained at 2 min excitations either by UV light or LED array source. (c) The detection of persistent luminescence nanoparticles after in vivo
activation. Here, the animals intravenously injected with ZGO-OH were irradiated with an orange/red LED source for 2 min, and images were acquired for 3 min
with the photon counting system. The inset shows a persistent luminescence decay curve from the liver. (d) The biodistribution of persistent luminescence
nanoparticles in a tumor-bearing mouse. Images were acquired 4 h after the injection of ZGO-PEG nanoparticles following visible activation of persistent
luminescence with orange/red LED illuminations, which clearly showed the enhanced tumor uptakes as well as the accumulation kinetics. (e) ZGO-NH
2
persistent luminescence NPs used for labelling of RAW cells in vitro (left images) and cells tracking in vivo (right images). Adapted from Maldiney et al. [88]
with permission
Inorganic Fluorescent Nanomaterials
71