Fig. 6From: Near Infrared-Emitting Cr3+/Eu3+ Co-doped Zinc Gallogermanate Persistence Luminescent Nanoparticles for Cell ImagingNIR persistent luminescence decay curves of ZGGO:Cr3+ and ZGGO:Cr3+,Eu3+ powders monitored at 697 nm after 254 nm UV light illumination for 5 minBack to article page