Figure 2
From: Scalable Epitaxial Growth of WSe2 Thin Films on SiO2/Si via a Self-Assembled PtSe2 Buffer Layer
The co-existence of 2H and 1T WSe2 structures. (a) Top-view TEM image after a FIB cut of the sample. Two squared regions are enlarged to show the different contrast. (b,c) FFT images for the 2H and 1T phases respectively, and an offset of 30° is shown. (d) High resolution HAADF-STEM image. (e) Enlarged HAADF-STEM image showing 2H hexagonal structure of WSe2. (f) Enlarged HAADF-STEM image showing 1T hexagonal structure of WSe2. (g) XPS spectra of W 4f and (h) Se 3d. Core-level peaks of WSe2 from the 2H and 1T phases are shown in red and green colors, respectively.
