Two-dimensional iodine-monofluoride epitaxy on WSe2

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...

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Autores principales:	Yung-Chang Lin, Sungwoo Lee, Yueh-Chiang Yang, Po-Wen Chiu, Gun-Do Lee, Kazu Suenaga
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Materials of engineering and construction. Mechanics of materials TA401-492 Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/7dadcde784f04a59ae0ecdd56eb26539
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spelling	oai:doaj.org-article:7dadcde784f04a59ae0ecdd56eb265392021-12-02T13:50:57ZTwo-dimensional iodine-monofluoride epitaxy on WSe210.1038/s41699-021-00201-82397-7132https://doaj.org/article/7dadcde784f04a59ae0ecdd56eb265392021-02-01T00:00:00Zhttps://doi.org/10.1038/s41699-021-00201-8https://doaj.org/toc/2397-7132Abstract 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.Yung-Chang LinSungwoo LeeYueh-Chiang YangPo-Wen ChiuGun-Do LeeKazu SuenagaNature PortfolioarticleMaterials of engineering and construction. Mechanics of materialsTA401-492ChemistryQD1-999ENnpj 2D Materials and Applications, Vol 5, Iss 1, Pp 1-6 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Materials of engineering and construction. Mechanics of materials TA401-492 Chemistry QD1-999
spellingShingle	Materials of engineering and construction. Mechanics of materials TA401-492 Chemistry QD1-999 Yung-Chang Lin Sungwoo Lee Yueh-Chiang Yang Po-Wen Chiu Gun-Do Lee Kazu Suenaga Two-dimensional iodine-monofluoride epitaxy on WSe2
description	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.
format	article
author	Yung-Chang Lin Sungwoo Lee Yueh-Chiang Yang Po-Wen Chiu Gun-Do Lee Kazu Suenaga
author_facet	Yung-Chang Lin Sungwoo Lee Yueh-Chiang Yang Po-Wen Chiu Gun-Do Lee Kazu Suenaga
author_sort	Yung-Chang Lin
title	Two-dimensional iodine-monofluoride epitaxy on WSe2
title_short	Two-dimensional iodine-monofluoride epitaxy on WSe2
title_full	Two-dimensional iodine-monofluoride epitaxy on WSe2
title_fullStr	Two-dimensional iodine-monofluoride epitaxy on WSe2
title_full_unstemmed	Two-dimensional iodine-monofluoride epitaxy on WSe2
title_sort	two-dimensional iodine-monofluoride epitaxy on wse2
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/7dadcde784f04a59ae0ecdd56eb26539
work_keys_str_mv	AT yungchanglin twodimensionaliodinemonofluorideepitaxyonwse2 AT sungwoolee twodimensionaliodinemonofluorideepitaxyonwse2 AT yuehchiangyang twodimensionaliodinemonofluorideepitaxyonwse2 AT powenchiu twodimensionaliodinemonofluorideepitaxyonwse2 AT gundolee twodimensionaliodinemonofluorideepitaxyonwse2 AT kazusuenaga twodimensionaliodinemonofluorideepitaxyonwse2
_version_	1718392447067750400

Two-dimensional iodine-monofluoride epitaxy on WSe2

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