Fig. 1From: Polydopamine nanoparticles attenuate retina ganglion cell degeneration and restore visual function after optic nerve injuryCharacterization of PDA nanoparticles. A, B TEM images of PDA nanoparticles. C Hydrodynamic size distribution and D zeta-potential of PDA nanoparticles. E–G ROS scavenging activities of PDA nanoparticles, including E superoxide anion (O2•−), F hydroxyl radicals (•OH), G DPPH radicalBack to article page