Fig. 1From: Triphenyl Phosphine-Functionalized Chitosan Nanoparticles Enhanced Antitumor Efficiency Through Targeted Delivery of Doxorubicin to MitochondriaCharacterization of Dox-loaded TPP-NPs. a TEM image of Dox-loaded TPP-NPs. b DLS analysis of the obtained Dox-loaded TPP-NPs. c In vitro release profile of Dox-loaded TPP-NPs in phosphate-buffered saline with different pH at 37 °C for 48 h. d FT-IR spectra of TPP-NPs and the mixture of TPP and CS NPsBack to article page