Fig. 5. (a) Schematic illustration of in vivo antitumor study. (b) Relative tumor volume of mice with various treatments. (c) Representative photographs of the corresponding excised tumor (from left to right were given PBS, 808 nm light, Mito-Au₂₅@MnO₂, Au₂₅NCs + 808 nm light and Mito-Au₂₅@MnO₂ + 808 nm light, respectively). (d) Images of H&E and TUNEL stained tumor tissues. Scale bar: 100 μm.