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(a, b) Low-magnification HAADF-STEM images of the out-of-plane WS2 and in-plane MoS2 cross sections, respectively. The inset in part a displays the magnification of the rectangular area marked by a white box. (c) Magnified area from part b. The scale bars in parts a and b correspond to 1 μm, and that in part c corresponds to 200 nm.
