Extended Data Fig. 1: Structural characterization of a binary ABO3-type superlattice (SL) of 8.6-nm CsPbBr3 and 14.5-nm Fe3O4 nanocrystals (γ = 0.541).
From: Perovskite-type superlattices from lead halide perovskite nanocubes
a, Low-magnification TEM image showing the large size of superlattice domains and homogeneous coverage over the carbon-coated TEM grid. b, TEM image of the area indicated by the box in a; upper inset is a higher-magnification TEM image; bottom inset is a small-angle ED pattern from a single superlattice domain in [001]SL projection. c, HAADF-STEM image of a [001]SL-oriented domain. d, EDX elemental maps of a [001]SL-oriented domain for Fe (grey, K line) and Pb (blue, L line). e, EDX line scans along the arrow in d. f, 2D GISAXS pattern showing long-range order. The superlattice reflections can be indexed using a tetragonal (P4/mmm) lattice: white markers correspond to the theoretical diffraction peak positions of a unit cell with a = b = 20.5 nm and c = 19.0 nm (red markers show the corresponding diffraction set for transmission channels, while white markers are for reflection channels; L defines the out-of-plane diffraction order).
