Fig. 3From: Hyaluronic acid modified covalent organic polymers for efficient targeted and oxygen-evolved phototherapya The oxygen content of different samples measured by digital oxygen meter. b Confocal laser scanning microscopy (CLSM) images of PC-3 cells after stained with RDDP for 2 h and incubated with or without FeDH for another 2 h. c UV–vis spectra of DPBF solutions mixed with (c) ICG@FeDH plus hydrogen peroxide and d ICG@FeDH under 808 nm laser irradiation for different time points. e The calculated degradation rate of DPBF based on the absorbance values at 419 nm in c, dBack to article page