Fig. 4From: Hyaluronic acid modified covalent organic polymers for efficient targeted and oxygen-evolved phototherapyCLSM images of PC-3 cells treated with ICG@FeD, ICG@FeDH and ICG@FeDH with free HA pre-treatment for 2 h. Blue color represents DAPI, red color represents the fluorescence of ICG. Scale bar is 40 μmBack to article page