Extended Data Fig. 3: Binary AlB2-type superlattices.
From: Perovskite-type superlattices from lead halide perovskite nanocubes
a, AlB2 unit cell, along with crystallographic models of [001]- and [120]-oriented AlB2 lattices. Fe3O4 is shown as grey spheres and CsPbBr3 as blue cubes. b–d, 5.3-nm CsPbBr3 nanocrystals combined with 12.5-nm Fe3O4 nanocrystals (γ = 0.353). e, f, 8.6-nm CsPbBr3 nanocrystals combined with 19.8-nm Fe3O4 nanocrystals (γ = 0.414). b, TEM image of a superlattice domain in the [001]SL orientation. c–f, TEM images (c, e) of superlattice domains in the [120]SL orientation, along with the corresponding ED patterns (d, f). The inset in c shows a HAADF-STEM image. The presence of orthogonal reflections from the (110) and (111) lattice planes of CsPbBr3 indicates alignment of nanocubes in the superlattice such that the [111] and [110] crystallographic directions of CsPbBr3 orient along [001]SL and [100]SL, respectively.
