Fig. 4.
Maghemite nanocube superlattices formed by slow drying of dilute and concentrated toluene-based dispersion of maghemite nanocubes under a constant magnetic field. (A) Low-magnification TEM image of superlattices formed from a concentrated (4.2 × 1014 particles per milliliter) nanocube dispersion. (Scale bar: 1 μm.) (B) Enlargement of a superlattice and selected area diffraction patterns on atomic scale (Inset in upper right) and mesoscale (Inset in lower left). (Scale bar: 500 nm.) (C) TEM image of the small nanocube arrays formed from a dilute (1.0 × 1014 particles per milliliter) toluene-based dispersion of maghemite nanocubes. (Scale bar: 100 nm.)