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Fig. 4 | Nanoscale Research Letters

Fig. 4

From: Magnetic-Field-Assisted Assembly of Anisotropic Superstructures by Iron Oxide Nanoparticles and Their Enhanced Magnetism

Fig. 4

SEM images of the assembled structures prepared with spherical IONPs. a SEM image of the homogeneous film. b SEM image of the rod-shaped superstructures, with an inset of microscopic image. c Enlarged SEM image revealing the monolayer and superstructure. d Close-up SEM image and FFT pattern (inset) of the delineated region revealing the hexagonal packing of the nanoparticles

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