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Optical spectra measurement of ICG and OI-NPs.
Notes: Fluorescence (A) and absorption (B) spectra of free ICG and OI-NPs. The optical stability of free ICG (C) and OI-NPs (D) at different time intervals. The results demonstrated that OI-NPs had a higher stability compared to freely dissolved ICG.
Abbreviations: ICG, Indocyanine green; OI-NPs, oxygen and indocyanine green loaded nanoparticles.
