Waterproof molecular monolayers stabilize 2D materials
Two-dimensional van der Waals materials have rich and unique functional properties, but many are susceptible to corrosion under ambient conditions. Here we show that linear alkylamines n-Cm H2m+1NH₂, with m = 4 through 11, are highly effective in protecting the optoelectronic properties of these mat...
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| Published in | Proceedings of the National Academy of Sciences - PNAS Vol. 116; no. 42; pp. 20844 - 20849 |
|---|---|
| Main Authors | , , , , , , , , , , , , , , , , , |
| Format | Journal Article |
| Language | English |
| Published |
United States
National Academy of Sciences
15.10.2019
Proceedings of the National Academy of Sciences |
| Subjects | |
| Online Access | Get full text |
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| Abstract | Two-dimensional van der Waals materials have rich and unique functional properties, but many are susceptible to corrosion under ambient conditions. Here we show that linear alkylamines n-Cm
H2m+1NH₂, with m = 4 through 11, are highly effective in protecting the optoelectronic properties of these materials, such as black phosphorus (BP) and transition-metal dichalcogenides (TMDs: WS₂, 1T′-MoTe₂, WTe₂, WSe₂, TaS₂, and NbSe₂). As a representative example, n-hexylamine (m = 6) can be applied in the form of thin molecular monolayers on BP flakes with less than 2-nm thickness and can prolong BP’s lifetime from a few hours to several weeks and even months in ambient environments. Characterizations combined with our theoretical analysis show that the thin monolayers selectively sift out water molecules, forming a drying layer to achieve the passivation of the protected 2D materials. The monolayer coating is also stable in air, H₂ annealing, and organic solvents, but can be removed by certain organic acids. |
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| AbstractList | Two-dimensional van der Waals materials have rich and unique functional properties, but many are susceptible to corrosion under ambient conditions. Here we show that linear alkylamines n-C m H2m+1NH2, with m = 4 through 11, are highly effective in protecting the optoelectronic properties of these materials, such as black phosphorus (BP) and transition-metal dichalcogenides (TMDs: WS2, 1T'-MoTe2, WTe2, WSe2, TaS2, and NbSe2). As a representative example, n-hexylamine (m = 6) can be applied in the form of thin molecular monolayers on BP flakes with less than 2-nm thickness and can prolong BP's lifetime from a few hours to several weeks and even months in ambient environments. Characterizations combined with our theoretical analysis show that the thin monolayers selectively sift out water molecules, forming a drying layer to achieve the passivation of the protected 2D materials. The monolayer coating is also stable in air, H2 annealing, and organic solvents, but can be removed by certain organic acids.Two-dimensional van der Waals materials have rich and unique functional properties, but many are susceptible to corrosion under ambient conditions. Here we show that linear alkylamines n-C m H2m+1NH2, with m = 4 through 11, are highly effective in protecting the optoelectronic properties of these materials, such as black phosphorus (BP) and transition-metal dichalcogenides (TMDs: WS2, 1T'-MoTe2, WTe2, WSe2, TaS2, and NbSe2). As a representative example, n-hexylamine (m = 6) can be applied in the form of thin molecular monolayers on BP flakes with less than 2-nm thickness and can prolong BP's lifetime from a few hours to several weeks and even months in ambient environments. Characterizations combined with our theoretical analysis show that the thin monolayers selectively sift out water molecules, forming a drying layer to achieve the passivation of the protected 2D materials. The monolayer coating is also stable in air, H2 annealing, and organic solvents, but can be removed by certain organic acids. Two-dimensional van der Waals materials have rich and unique functional properties, but many are susceptible to corrosion under ambient conditions. Here we show that linear alkylamines n-CmH2m+1NH2, with m = 4 through 11, are highly effective in protecting the optoelectronic properties of these materials, such as black phosphorus (BP) and transition-metal dichalcogenides (TMDs: WS2, 1T′-MoTe2, WTe2, WSe2, TaS2, and NbSe2). As a representative example, n-hexylamine (m = 6) can be applied in the form of thin molecular monolayers on BP flakes with less than 2-nm thickness and can prolong BP's lifetime from a few hours to several weeks and even months in ambient environments. Characterizations combined with our theoretical analysis show that the thin monolayers selectively sift out water molecules, forming a drying layer to achieve the passivation of the protected 2D materials. The monolayer coating is also stable in air, H2 annealing, and organic solvents, but can be removed by certain organic acids. A family of strong yet removable 1- to 2-nm-thick ultrathin monolayer is developed as a corrosion inhibitor for 2-dimensional materials that significantly prolong lifetime while protecting optoelectronic properties in both ambient and harsh chemical or thermal environments. This method is low in toxicity and can be applied to arbitrary substrate with no size limit. Two-dimensional van der Waals materials have rich and unique functional properties, but many are susceptible to corrosion under ambient conditions. Here we show that linear alkylamines n -C m H 2 m +1 NH 2 , with m = 4 through 11, are highly effective in protecting the optoelectronic properties of these materials, such as black phosphorus (BP) and transition-metal dichalcogenides (TMDs: WS 2 , 1T′-MoTe 2 , WTe 2 , WSe 2 , TaS 2 , and NbSe 2 ). As a representative example, n -hexylamine ( m = 6) can be applied in the form of thin molecular monolayers on BP flakes with less than 2-nm thickness and can prolong BP’s lifetime from a few hours to several weeks and even months in ambient environments. Characterizations combined with our theoretical analysis show that the thin monolayers selectively sift out water molecules, forming a drying layer to achieve the passivation of the protected 2D materials. The monolayer coating is also stable in air, H 2 annealing, and organic solvents, but can be removed by certain organic acids. Two-dimensional van der Waals materials have rich and unique functional properties, but many are susceptible to corrosion under ambient conditions. Here we show that linear alkylamines n-Cm H2m+1NH₂, with m = 4 through 11, are highly effective in protecting the optoelectronic properties of these materials, such as black phosphorus (BP) and transition-metal dichalcogenides (TMDs: WS₂, 1T′-MoTe₂, WTe₂, WSe₂, TaS₂, and NbSe₂). As a representative example, n-hexylamine (m = 6) can be applied in the form of thin molecular monolayers on BP flakes with less than 2-nm thickness and can prolong BP’s lifetime from a few hours to several weeks and even months in ambient environments. Characterizations combined with our theoretical analysis show that the thin monolayers selectively sift out water molecules, forming a drying layer to achieve the passivation of the protected 2D materials. The monolayer coating is also stable in air, H₂ annealing, and organic solvents, but can be removed by certain organic acids. Two-dimensional van der Waals materials have rich and unique functional properties, but many are susceptible to corrosion under ambient conditions. Here we show that linear alkylamines -C H NH , with = 4 through 11, are highly effective in protecting the optoelectronic properties of these materials, such as black phosphorus (BP) and transition-metal dichalcogenides (TMDs: WS , 1T'-MoTe , WTe , WSe , TaS , and NbSe ). As a representative example, -hexylamine ( = 6) can be applied in the form of thin molecular monolayers on BP flakes with less than 2-nm thickness and can prolong BP's lifetime from a few hours to several weeks and even months in ambient environments. Characterizations combined with our theoretical analysis show that the thin monolayers selectively sift out water molecules, forming a drying layer to achieve the passivation of the protected 2D materials. The monolayer coating is also stable in air, H annealing, and organic solvents, but can be removed by certain organic acids. |
| Author | Zettsu, Nobuyuki Kong, Jing Teshima, Katsuya Su, Cong Dincă, Mircea Dong, Mingdong Yan, Qing-Bo Xu, Wenshuo Ji, Xiang Wang, Zegao Warner, Jamie H. Li, Ju Lin, Hongtao Yamada, Tetsuya Hu, Juejun Sun, Lei Su, Gang Yin, Zongyou |
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| Copyright | Copyright National Academy of Sciences Oct 15, 2019 2019 |
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| Issue | 42 |
| Keywords | multilayer 2D materials anticorrosion molecular monolayer stabilizer |
| Language | English |
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| Notes | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 14 content type line 23 SC0001088; ECCS-1610806; DP190100295; Q4601024; 2013CB933401; 11474279; XDB07010100; 1453218; 023674 Ministry of Science and Technology of China Chinese Academy of Sciences USDOE Office of Science (SC), Basic Energy Sciences (BES) US Army Research Office (ARO) National Science Foundation of China National Science Foundation (NSF) Australian National University Australian Research Council Edited by Michael L. Klein, Temple University, Philadelphia, PA, and approved September 11, 2019 (received for review June 4, 2019) 1C.S., Z.Y., and Q.-B.Y. contributed equally to this work. Author contributions: C.S., Z.Y., and J.L. designed research; C.S., Z.Y., Q.-B.Y., Z.W., H.L., W.X., T.Y., and X.J. performed research; C.S., Z.Y., L.S., N.Z., K.T., J.H.W., M. Dincă, J.H., M. Dong, G.S., J.K., and J.L. analyzed data; N.Z., K.T., J.H.W., M. Dincă, J.H., M. Dong, G.S., J.K., and J.L. supervised the project; and C.S., Z.Y., and J.L. wrote the paper. |
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| Snippet | Two-dimensional van der Waals materials have rich and unique functional properties, but many are susceptible to corrosion under ambient conditions. Here we... A family of strong yet removable 1- to 2-nm-thick ultrathin monolayer is developed as a corrosion inhibitor for 2-dimensional materials that significantly... |
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| SubjectTerms | Alkylamines anticorrosion Drying MATERIALS SCIENCE molecular monolayer stabilizer Monolayers multilayer 2D materials Optoelectronics Organic acids Organic solvents Phosphorus Physical Sciences Protective coatings Theoretical analysis Transition metal compounds Two dimensional materials Water chemistry |
| Title | Waterproof molecular monolayers stabilize 2D materials |
| URI | https://www.jstor.org/stable/26857768 https://www.ncbi.nlm.nih.gov/pubmed/31575741 https://www.proquest.com/docview/2307136191 https://www.proquest.com/docview/2300178213 https://www.osti.gov/biblio/1567962 https://pubmed.ncbi.nlm.nih.gov/PMC6800348 |
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