Fig. 3
From: Enhanced MRI T 2 Relaxivity in Contrast-Probed Anchor-Free PEGylated Iron Oxide Nanoparticles
a Bright field HRTEM images of bare Fe3O4 nanoparticles (SPION). The top left and right and bottom left insets show the average crystal size distribution, close-up and the SAED pattern of SPION, respectively. b Bright field HRTEM images of PEGylated Fe3O4 nanoparticles (PEG-SPION). The top left and right and bottom left insets show the average crystal size distribution, close-up, and the SAED pattern of PEG-SPION, respectively