| Autor: |
Yung-Chang Lin, Sungwoo Lee, Yueh-Chiang Yang, Po-Wen Chiu, Gun-Do Lee, Kazu Suenaga |
| Jazyk: |
angličtina |
| Rok vydání: |
2021 |
| Předmět: |
|
| Zdroj: |
npj 2D Materials and Applications, Vol 5, Iss 1, Pp 1-6 (2021) |
| Druh dokumentu: |
article |
| ISSN: |
2397-7132 |
| DOI: |
10.1038/s41699-021-00201-8 |
| Popis: |
Abstract Interhalogen compounds (IHCs) are extremely reactive molecules used for halogenation, catalyst, selective etchant, and surface modification. Most of the IHCs are unstable at room temperature especially for the iodine-monofluoride (IF) whose structure is still unknown. Here we demonstrate an unambiguous observation of two-dimensional (2D) IF bilayer grown on the surface of WSe2 by using scanning transmission electron microscopy and electron energy loss spectroscopy. The bilayer IF shows a clear hexagonal lattice and robust epitaxial relationship with the WSe2 substrate. Despite the IF is known to sublimate at −14 °C and has never found as a solid form in the ambient condition, but surprisingly it is found stabilized on a suitable substrate and the stabilized structure is supported by a density functional theory. This 2D form of IHC is actually a byproduct during a chemical vapor deposition growth of WSe2 in the presence of alkali metal halides as a growth promoter and requires immediate surface passivation to sustain. This work points out a great possibility to produce 2D structures that are unexpected to be crystallized or cannot be obtained by a simple exfoliation but can be grown only on a certain substrate. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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