Extended Data Fig. 7: HAADF–STEM images of the underlying TMD templates in MCs/TMD heterostructures. | Nature Nanotechnology

Extended Data Fig. 7: HAADF–STEM images of the underlying TMD templates in MCs/TMD heterostructures.

From: Epitaxial substitution of metal iodides for low-temperature growth of two-dimensional metal chalcogenides

Extended Data Fig. 7

Schematic illustration of individual TMD (a), MCs/TMD heterostructures before (b) and after (c) sliding MCs by AFM. OM images of individual monolayer WS2 (d), MC/TMD heterostructures before (e) and after (f) sliding the MC by AFM. In-situ AFM images of MC/TMD heterostructures before (g) and after (h) sliding the MC. The area marked in panel h is corresponding to the location in panel g. (i) STEM image of individual monolayer WS2. (j) STEM image of In2S3/WS2 after sliding away the MCs by AFM. The enlargement of the highlighted area is shown in Fig. 3b. (k) STEM image of SnSe2/WS2 after sliding away the SnSe2 by AFM. (l) Enlargement of the monolayer WS2 area marked in panel i. The underlying TMD templates were exposed by sliding the MCs by AFM. The HAADF–STEM images of individual monolayer WS2 (i), underlying monolayer WS2 in In2S3/WS2 (Fig. 3b) and SnSe2/WS2 (l) show the perfect WS2 crystal structure (Fig. 3c). The grown MCs domains usually with varying shapes on TMD templates due to the kinetically controlled MIs domain shape at low temperatures.

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