Fig. 2

Physical and chemical properties. (a) The CAT-like activity of LZ NPs under different H₂O₂ concentrations (1, 5, 10 and 20 mM). (b) The net difference of oxygen production about a). (c) Fluorescence intensity of DCF in PBS under different treatments. (d) The peak fluorescence intensity of DCF in PBS under different treatments. (e) The fluorescence images of ROS production at the cellular level. (f) The fluorescence images of oxygen generation at the cellular level. (g) The fluorescence images of CD44 targeting performance