Fig. 2: Characterization of ICG@CCM-AuNC-PO2-Hb.

TEM images of a AgNC, b Ag-AuNC, c AuNC, d AuNC-PO₂-Hb, e, f ICG@CCM-AuNC-PO₂-Hb. g UV-vis spectra of ICG@CCM-AuNC-PO₂-Hb. h Sizes and i zeta potentials of ICG@CCM-AuNC-PO₂-Hb (n  =  3 independent samples). Data are presented as means ± SD. j Fluorescent spectra of ICG@CCM-AuNC-PO₂-Hb under the excitation of 750 nm. k SEM image of ICG@CCM-AuNC-PO₂-Hb (inset: atomic percentage of the corresponding nanoparticles). l EDX mapping of ICG@CCM-AuNC-PO₂-Hb. (1. AuNC, 2. AuNC-PO₂-Hb, 3. ICG@CCM-AuNC-PO₂-Hb, 4. ICG@CCM, 5. ICG, 6. CCM, 7. Hb). The inside abbreviations [Au] = Gold, [C] = Carbon, [N] = Nitrogen, [O] = Oxygen. Experiments were performed three times (a–f) or twice (k, l), with similar results. Source data are provided as a Source Data file.