In the realm of two-dimensional material frameworks, single-element graphene-like lattices, known as Xenes, pose several issues concerning their environmental stability, with implications for their use in technology transfer to a device layout. In this Discussion, we scrutinize the chemical reactivity of epitaxial silicene, taken as a case in point, in oxygen-rich environments. The oxidation of silicene is detailed by means of a photoemission spectroscopy study upon carefully dosing molecular oxygen under vacuum and subsequent exposure to ambient conditions, showing different chemical reactivity. We therefore propose a sequential Al2O3 encapsulation of silicene as a solution to face degradation, proving its effectiveness by virtue of the interaction between silicene and a silver substrate. Based on this method, we generalize our encapsulation scheme to a large number of metal-supported Xenes by taking into account the case of epitaxial phosphorene-on-gold.

Molle, A., Faraone, G., Lamperti, A., Chiappe, D., Cinquanta, E., Martella, C., et al. (2021). Stability and universal encapsulation of epitaxial Xenes. FARADAY DISCUSSIONS, 227(1 April 2021), 171-183 [10.1039/C9FD00121B].

Stability and universal encapsulation of epitaxial Xenes

Molle, Alessandro
;
Faraone, Gabriele;Bonera, Emiliano;Scalise, Emilio;Grazianetti, Carlo
2021

Abstract

In the realm of two-dimensional material frameworks, single-element graphene-like lattices, known as Xenes, pose several issues concerning their environmental stability, with implications for their use in technology transfer to a device layout. In this Discussion, we scrutinize the chemical reactivity of epitaxial silicene, taken as a case in point, in oxygen-rich environments. The oxidation of silicene is detailed by means of a photoemission spectroscopy study upon carefully dosing molecular oxygen under vacuum and subsequent exposure to ambient conditions, showing different chemical reactivity. We therefore propose a sequential Al2O3 encapsulation of silicene as a solution to face degradation, proving its effectiveness by virtue of the interaction between silicene and a silver substrate. Based on this method, we generalize our encapsulation scheme to a large number of metal-supported Xenes by taking into account the case of epitaxial phosphorene-on-gold.
Articolo in rivista - Articolo scientifico
Scientifica
2D materials, Xenes, silicene, encapsulation
English
Molle, A., Faraone, G., Lamperti, A., Chiappe, D., Cinquanta, E., Martella, C., et al. (2021). Stability and universal encapsulation of epitaxial Xenes. FARADAY DISCUSSIONS, 227(1 April 2021), 171-183 [10.1039/C9FD00121B].
Molle, A; Faraone, G; Lamperti, A; Chiappe, D; Cinquanta, E; Martella, C; Bonera, E; Scalise, E; Grazianetti, C
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/10281/264033
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