Fig. 2From: Metal complexation-mediated stable and biocompatible nanoformulation of clinically approved near-infrared absorber for improved tumor targeting and photonic theranosticsCharacterization of the ICG-Fe complex. a Photograph of the ICG-Fe complex in water as a function of the ICG:Fe3+ molar ratio ranging from 1:0 to 1:10, and b, c their spectra in methanol: b UV/Vis absorption and c fluorescence emission (λex = 720 nm)Back to article page