Fig. 5From: Magnetic-Field-Assisted Assembly of Anisotropic Superstructures by Iron Oxide Nanoparticles and Their Enhanced MagnetismSEM images of the rod-shaped superstructures prepared under different conditions. a SEM image of the superstructures prepared by increasing the tilt angle of the substrate. b SEM image of the superstructures prepared by decreasing the concentration of the nanoparticle solution. c SEM image of the superstructures prepared by reducing the magnitude and gradient of the applied magnetic fieldBack to article page