Fig. 4From: A polydopamine nanomedicine used in photothermal therapy for liver cancer knocks down the anti-cancer target NEDD8-E3 ligase ROC1 (RBX1)Characterizations of PDA NPs. a Transmission electron microscopy (TEM) image, scale bar: 100Â nm. b Particle size distribution analysis performed with dynamic light scattering (DLS). c Ultraviolet absorption spectrum of siRNA/PEI. d Infrared (FTIR) spectrum of siRNA/PEI@PDA and FA modified siRNA/PEI@PDABack to article page