Fig. 3. In vivo NIR-II fluorescence imaging. (A) In vivo NIR-II fluorescence images of the C6 subcutaneous tumor at different time points before and after IV injection of Au–Gd NCs. Scale bar = 1 cm. (B) Quantitative analysis of tumor fluorescence at different time points. (C), (D) Ex vivo digital photograph and NIR-II fluorescence images of important organs at the time points of 8 h and 24 h post-injection of Au–Gd NCs. Scale bar = 1 cm. (E) Quantitative analysis in (C, D).
