Fig. 1

a Illustration of cRGD-directed polymersomal doxorubicin (cRGD-PS-Dox) for active targeting chemotherapy of lung tumor xenografts in mice; b DLS measurement and TEM photograph of cRGD-PS; c UV absorbance of cRGD-PS before and after crosslinking; d In vitro Dox release in PB with or without GSH (10 mM) at 37 °C