Microstructural characterization of the In2Se3. (a) HAADF image of In2Se3 flake transferred onto a TEM grid. (b, c) EDS maps of In and Se for this In2Se3 flake. (d) An EDS spectrum of the sample, which shows an atomic ratio of 2:3 (In:Se). (e, f) Optical microscope (e) and HRTEM (f) images of a In2Se3 flake transferred onto a TEM grid. (g–l) SEAD patterns obtained from the six positions labeled 1–6 on the transferred sample in (e).