Fig. 3: Structural analysis of selected three as-synthesized 2D AMX2 compounds.
From: General synthesis of ionic-electronic coupled two-dimensional materials
a, d, g High-resolution transmission electron microscopy (HRTEM) images of AgCrS2, AgBiSe2, and CuInS2 along the direction out of the plane of the as-grown nanosheets, scale bar: 0.5 nm. The insets display the top view of atomic structure models and selected area electron diffraction (SAED) patterns. b, e, h Cross-sectional high-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM) images of AgCrS2, AgBiSe2, and CuInS2, scale bar: 0.5 nm. The insets display the side view of the atomic structure models and the fast Fourier transform (FFT) patterns. The blue and red polygons represent the octahedral and tetrahedron sites. c, f, i Intensity profiles of the orange dash lines in (b), (e), and (h).
