From Growth Surface to Device Interface: Preserving Metallic Fe under Monolayer Hexagonal Boron Nitride

Sabina Caneva, Marie Blandine Martin, Lorenzo D'Arsié, Adrianus I. Aria, Hikmet Sezen, Matteo Amati, Luca Gregoratti, Hisashi Sugime, Santiago Esconjauregui, John Robertson, Stephan Hofmann, Robert S. Weatherup

研究成果: Article

6 引用 (Scopus)

抄録

We investigate the interfacial chemistry between Fe catalyst foils and monolayer hexagonal boron nitride (h-BN) following chemical vapor deposition and during subsequent atmospheric exposure, using scanning electron microscopy, X-ray photoemission spectroscopy, and scanning photoelectron microscopy. We show that regions of the Fe surface covered by h-BN remain in a metallic state during exposure to moist air for ∼40 h at room temperature. This protection is attributed to the strong interfacial interaction between h-BN and Fe, which prevents the rapid intercalation of oxidizing species. Local Fe oxidation is observed on bare Fe regions and close to defects in the h-BN film (e.g., domain boundaries, wrinkles, and edges), which over the longer-term provide pathways for slow bulk oxidation of Fe. We further confirm that the interface between h-BN and metallic Fe can be recovered by vacuum annealing at ∼600 °C, although this is accompanied by the creation of defects within the h-BN film. We discuss the importance of these findings in the context of integrated manufacturing and transfer-free device integration of h-BN, particularly for technologically important applications where h-BN has potential as a tunnel barrier such as magnetic tunnel junctions.

元の言語English
ページ(範囲)29973-29981
ページ数9
ジャーナルACS Applied Materials and Interfaces
9
発行部数35
DOI
出版物ステータスPublished - 2017 9 6
外部発表Yes

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Boron nitride
Monolayers
Oxidation
Defects
Tunnel junctions
boron nitride
Intercalation
Photoelectron spectroscopy
Photoelectrons
X ray spectroscopy
Surface chemistry
Metal foil
Chemical vapor deposition
Tunnels
Microscopic examination
Vacuum
Annealing
Scanning
Scanning electron microscopy
Catalysts

ASJC Scopus subject areas

  • Materials Science(all)

これを引用

Caneva, S., Martin, M. B., D'Arsié, L., Aria, A. I., Sezen, H., Amati, M., ... Weatherup, R. S. (2017). From Growth Surface to Device Interface: Preserving Metallic Fe under Monolayer Hexagonal Boron Nitride. ACS Applied Materials and Interfaces, 9(35), 29973-29981. https://doi.org/10.1021/acsami.7b08717

From Growth Surface to Device Interface : Preserving Metallic Fe under Monolayer Hexagonal Boron Nitride. / Caneva, Sabina; Martin, Marie Blandine; D'Arsié, Lorenzo; Aria, Adrianus I.; Sezen, Hikmet; Amati, Matteo; Gregoratti, Luca; Sugime, Hisashi; Esconjauregui, Santiago; Robertson, John; Hofmann, Stephan; Weatherup, Robert S.

:: ACS Applied Materials and Interfaces, 巻 9, 番号 35, 06.09.2017, p. 29973-29981.

研究成果: Article

Caneva, S, Martin, MB, D'Arsié, L, Aria, AI, Sezen, H, Amati, M, Gregoratti, L, Sugime, H, Esconjauregui, S, Robertson, J, Hofmann, S & Weatherup, RS 2017, 'From Growth Surface to Device Interface: Preserving Metallic Fe under Monolayer Hexagonal Boron Nitride', ACS Applied Materials and Interfaces, 巻. 9, 番号 35, pp. 29973-29981. https://doi.org/10.1021/acsami.7b08717
Caneva, Sabina ; Martin, Marie Blandine ; D'Arsié, Lorenzo ; Aria, Adrianus I. ; Sezen, Hikmet ; Amati, Matteo ; Gregoratti, Luca ; Sugime, Hisashi ; Esconjauregui, Santiago ; Robertson, John ; Hofmann, Stephan ; Weatherup, Robert S. / From Growth Surface to Device Interface : Preserving Metallic Fe under Monolayer Hexagonal Boron Nitride. :: ACS Applied Materials and Interfaces. 2017 ; 巻 9, 番号 35. pp. 29973-29981.
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abstract = "We investigate the interfacial chemistry between Fe catalyst foils and monolayer hexagonal boron nitride (h-BN) following chemical vapor deposition and during subsequent atmospheric exposure, using scanning electron microscopy, X-ray photoemission spectroscopy, and scanning photoelectron microscopy. We show that regions of the Fe surface covered by h-BN remain in a metallic state during exposure to moist air for ∼40 h at room temperature. This protection is attributed to the strong interfacial interaction between h-BN and Fe, which prevents the rapid intercalation of oxidizing species. Local Fe oxidation is observed on bare Fe regions and close to defects in the h-BN film (e.g., domain boundaries, wrinkles, and edges), which over the longer-term provide pathways for slow bulk oxidation of Fe. We further confirm that the interface between h-BN and metallic Fe can be recovered by vacuum annealing at ∼600 °C, although this is accompanied by the creation of defects within the h-BN film. We discuss the importance of these findings in the context of integrated manufacturing and transfer-free device integration of h-BN, particularly for technologically important applications where h-BN has potential as a tunnel barrier such as magnetic tunnel junctions.",
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AU - Caneva, Sabina

AU - Martin, Marie Blandine

AU - D'Arsié, Lorenzo

AU - Aria, Adrianus I.

AU - Sezen, Hikmet

AU - Amati, Matteo

AU - Gregoratti, Luca

AU - Sugime, Hisashi

AU - Esconjauregui, Santiago

AU - Robertson, John

AU - Hofmann, Stephan

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KW - iron (Fe)

KW - X-ray photoelectron spectroscopy (XPS)

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