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Structure of Restacked MoS2 and WS2 Elucidated by Electron Crystallography
Abstract
There has been a lot of confusion about the nature of restacked MoS 2 and WS 2 . The structure has been proposed to be trigonal TiS 2 type with octahedral M 4+ and called 1T-MoS 2 . The presence of a distortion in the metal plane that gives rise to a superstructure has been suggested. We have performed electron crystallographic studies on small (submicron) single crystal domains of restacked WS 2 and MoS 2 to solve their superstructure. We find that what initially seems to be a trigonal crystal is actually a “triplet” of three individual orthorhombic crystals. Using two-dimensional hk 0 data from films for both “triple” and “single” crystals we calculated corresponding Patterson projections, which reveal a severe distortion in the Mo/W plane, forming infinite zigzag chains. The projection of the structure suggests M−M distances of 2.92 and 2.74 Å for MoS 2 and WS 2, respectively. Least-squares refinement from the single-crystal data gives R 1 = 13.3% for WS 2 and R 1 = 15.3% for MoS 2 . Therefore, we submit that restacked MoS 2 and WS 2 are not 1T form but rather WTe 2 type.
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Metadata
- Authors
- Heising, J., & Kanatzidis, M. G.
- Venue
- Journal of the American Chemical Society
- Publisher
- American Chemical Society (ACS)
- Published
- 1999-01-14
- Volume
- 121
- Issue
- 4
- Pages
- 638-643
- ISSN
- 0002-7863 (ISSN-L)
- 1520-5126
- OpenAlex
- W2003525986
- Cited by
- 281
- References
- 0
- FWCI
- 4.86
- Type
- journal article
- Language
- en
- Open access
- closed
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