Fig. 2: The properties evaluation of YHM.

a Fluorescence spectra of YHM in water and simulated TME (the inset shows the corresponding NIR-II images). b Oxygen production capacity curve of H2O2 and YHM + H2O2. c Mn release curves of YHM under simulated TME and pH=7.4 PBS. d 1O2 generation capacity curve (SOSG probe) of YHM + US and YHM + H2O2 + US groups. e Detection of 1O2 generation under different conditions by ESR spectra. f Cytotoxicity of L929 cells and C6 cells under different concentrations of YHM