Fig. 3. (A) Photoacoustic images (PAI) of aqueous OctaNPs solutions (0.1 mg mL−1) across various pH values recorded at different time points. (B and C) Hemolytic rate of OctaNPs and (C and D) HE staining images of the major organs (including heart, liver, spleen, lung, kidney) and stomach from mice treated with neutral aqueous solutions of OctaNPs (5 mg kg−1) through oral and tail vein injection for 7 days, respectively. Magnification × 400.
