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Article


Title

Computational study of the intercalation of NO2 between bilayer MoTe2

Authors

[ 1 ] Instytut Fizyki, Wydział Inżynierii Materiałowej i Fizyki Technicznej, Politechnika Poznańska | [ P ] employee

Scientific discipline (Law 2.0)

[2.7] Materials engineering

Year of publication

2023

Published in

Applied Surface Science

Journal year: 2023 | Journal volume: vol. 611, part A

Article type

scientific article

Publication language

english

Keywords
EN
  • Nitrogen dioxide
  • Molybdenum ditelluride
  • Surface interactions
  • Intercalation
  • Density functional theory
Abstract

EN Transition-metal dichalcogenide (TMD) layers have been a subject of widespread interest as chemical sensors with their sensitivity selectively enhanced depending on the number of layers. The effect has been linked to possible intercalation of species such as nitrogen dioxide (NO2). However, whether intercalation helps or even occurs remains speculative. Hence, this work investigates, employing density functional theory (DFT) calculations, the intercalation of NO2 between bilayers of molybdenum ditelluride (MoTe2), its energy, and the impact on charge transfer. The effects are confronted with the intercalation of nitrogen molecules (N2) and the equivalent adsorption of both species. The results show that the intercalation of NO2 can be energetically favorable for 4.0 molecules/nm2 and that at low coverage, the molecule-sheet interactions are too weak to facilitate sufficient interlayer expansion, and thus the molecules dissociate. The dissociation and non-dissociative intercalation of NO2 enhance the per molecule charge transfer by 1110% and 256%, respectively, relative to adsorption. Hence, in all favorable cases, the intercalation should significantly enhance the response of the system. Furthermore, the results suggest that the evacuation of NO2 should be feasible, allowing MoTe2 recovery. In contrast, N2 intercalation is unfavorable, illustrating the selectivity of the process.

Date of online publication

08.11.2022

Pages (from - to)

155514-1 - 155514-10

DOI

10.1016/j.apsusc.2022.155514

URL

https://www.sciencedirect.com/science/article/pii/S0169433222030422?via%3Dihub

Comments

Article Number: 155514

Ministry points / journal

140.0

Impact Factor

7.392 [List 2021]

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