Journal of Physical Chemistry Letters, volume 10, issue 21, pages 6492-6498
Nonstoichiometric Phases of Two-Dimensional Transition-Metal Dichalcogenides: From Chalcogen Vacancies to Pure Metal Membranes
3
Publication type: Journal Article
Publication date: 2019-10-07
Quartile SCImago
Q1
Quartile WOS
Q1
Impact factor: 5.7
ISSN: 19487185
Physical and Theoretical Chemistry
General Materials Science
Abstract
Two-dimensional (2D) membranes consisting of a single layer of Mo atoms were recently manufactured [Adv. Mater. 30 (2018) 1707281] from MoSe2 sheets by sputtering Se atoms using electron beam in a transmission electron microscope. This is an unexpected result, as formation of Mo clusters should energetically be more favorable. To get microscopic insights into the energetics of realistic Mo membranes and non- stoichiometric phases of transition metal dichalcogenides (TMDs) MaXb, where (M = Mo, W) and (X= S, Se, Te), we carry out first-principles calculations and demonstrate that the membranes, which can be referred to as metallic quantum dots embedded into semiconducting matrix, can be stabilized by charge transfer. We also show that an ideal neutral 2D Mo or W sheet is not flat, but a corrugated structure, with a square lattice being the lowest energy configuration. We further demonstrate that several intermediate non-stoichiometric phases of TMDs are possible, as they have lower formation energies than pure metal membranes. Among them, the orthorhombic metallic 2D M4X4 phase is particularly stable. Finally, we study the properties of this phase in detail and discuss how it can be manufactured by the top-down approaches.
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1
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- We do not take into account publications that without a DOI.
- Statistics recalculated only for publications connected to researchers, organizations and labs registered on the platform.
- Statistics recalculated weekly.
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Joseph T. et al. Nonstoichiometric Phases of Two-Dimensional Transition-Metal Dichalcogenides: From Chalcogen Vacancies to Pure Metal Membranes // Journal of Physical Chemistry Letters. 2019. Vol. 10. No. 21. pp. 6492-6498.
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Joseph T., Ghorbani-Asl M., Kvashnin A. G., Larionov K. V., Popov Z., Sorokin P. B., Krasheninnikov A. V. Nonstoichiometric Phases of Two-Dimensional Transition-Metal Dichalcogenides: From Chalcogen Vacancies to Pure Metal Membranes // Journal of Physical Chemistry Letters. 2019. Vol. 10. No. 21. pp. 6492-6498.
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TY - JOUR
DO - 10.1021/acs.jpclett.9b02529
UR - https://doi.org/10.1021%2Facs.jpclett.9b02529
TI - Nonstoichiometric Phases of Two-Dimensional Transition-Metal Dichalcogenides: From Chalcogen Vacancies to Pure Metal Membranes
T2 - Journal of Physical Chemistry Letters
AU - Joseph, Tinku
AU - Ghorbani-Asl, Mahdi
AU - Kvashnin, Alexander G.
AU - Larionov, Konstantin V.
AU - Sorokin, Pavel B.
AU - Krasheninnikov, Arkady V.
AU - Popov, Zakhar
PY - 2019
DA - 2019/10/07 00:00:00
PB - American Chemical Society (ACS)
SP - 6492-6498
IS - 21
VL - 10
SN - 1948-7185
ER -
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@article{2019_Joseph,
author = {Tinku Joseph and Mahdi Ghorbani-Asl and Alexander G. Kvashnin and Konstantin V. Larionov and Pavel B. Sorokin and Arkady V. Krasheninnikov and Zakhar Popov},
title = {Nonstoichiometric Phases of Two-Dimensional Transition-Metal Dichalcogenides: From Chalcogen Vacancies to Pure Metal Membranes},
journal = {Journal of Physical Chemistry Letters},
year = {2019},
volume = {10},
publisher = {American Chemical Society (ACS)},
month = {oct},
url = {https://doi.org/10.1021%2Facs.jpclett.9b02529},
number = {21},
pages = {6492--6498},
doi = {10.1021/acs.jpclett.9b02529}
}
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Joseph, Tinku, et al. “Nonstoichiometric Phases of Two-Dimensional Transition-Metal Dichalcogenides: From Chalcogen Vacancies to Pure Metal Membranes.” Journal of Physical Chemistry Letters, vol. 10, no. 21, Oct. 2019, pp. 6492-6498. https://doi.org/10.1021%2Facs.jpclett.9b02529.