Two-dimensional silica (2D silica) is a layered polymorph of silicon dioxide. Two varieties of 2D silica, both of hexagonal crystal symmetry, have been grown so far on various metal substrates. One is based on SiO4 tetrahedra, which are covalently bonded to the substrate. The second comprises graphene-like fully saturated sheets, which interact with the substrate via weak van der Waals bonds. One sheet of the second 2D silica variety is also called hexagonal bilayer silica (HBS); it can have either ordered or disordered (amorphous) structure.
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| - 2D silica (en)
- Silice 2D (fr)
- 2D 실리카 (ko)
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| - 2D 실리카 (영어:2D Silica)는 이산화 규소의 2차원적인 동질이상이다. 두 종류의 2D 실리카가 있으며 두 종류 모두다 육방정계이다. 하나는 기질과 공유 결합을 하는 사면체에 기반을 두고 있으며, 다른 하나는 기질과 약한 판데르발스 결합을 하는 그래핀과 비슷한 포화 시트로 구성되어 있다. 두번째 2D 실리카의 변형은 HBS(hexagonal bilayer silica)라 불리기도 하며, 배열된 상태와 그렇지 않은(비정질인) 구조를 둘 다 가질 수 있다. 2D실리카는 가장 얇은 로서 전자공학에서 활용될것으로 보인다. 또한 기질로부터의 그래핀의 분리에 사용될 수 있다. (ko)
- Two-dimensional silica (2D silica) is a layered polymorph of silicon dioxide. Two varieties of 2D silica, both of hexagonal crystal symmetry, have been grown so far on various metal substrates. One is based on SiO4 tetrahedra, which are covalently bonded to the substrate. The second comprises graphene-like fully saturated sheets, which interact with the substrate via weak van der Waals bonds. One sheet of the second 2D silica variety is also called hexagonal bilayer silica (HBS); it can have either ordered or disordered (amorphous) structure. (en)
- La silice à deux dimensions (silice 2D) est un polymorphe du dioxyde de silicium en couches. Deux variétés de la silice 2D, tous deux des cristaux de symétrie hexagonale, ont été cultivés jusqu'à présent sur différents substrats métalliques. L'une est basé sur les tétraèdres de SiO4, qui sont liés de manière covalente au substrat. (fr)
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| - Two-dimensional silica (2D silica) is a layered polymorph of silicon dioxide. Two varieties of 2D silica, both of hexagonal crystal symmetry, have been grown so far on various metal substrates. One is based on SiO4 tetrahedra, which are covalently bonded to the substrate. The second comprises graphene-like fully saturated sheets, which interact with the substrate via weak van der Waals bonds. One sheet of the second 2D silica variety is also called hexagonal bilayer silica (HBS); it can have either ordered or disordered (amorphous) structure. 2D silica has potential applications in electronics as the thinnest gate dielectric. It can also be used for isolation of graphene sheets from the substrate. 2D silica is a wide band gap semiconductor, whose band gap and geometry can be engineered by external electric field. It was shown to be a member of the auxetics materials family with a negative Poisson's ratio. (en)
- La silice à deux dimensions (silice 2D) est un polymorphe du dioxyde de silicium en couches. Deux variétés de la silice 2D, tous deux des cristaux de symétrie hexagonale, ont été cultivés jusqu'à présent sur différents substrats métalliques. L'une est basé sur les tétraèdres de SiO4, qui sont liés de manière covalente au substrat. La seconde comprend des feuillets saturés analogues au graphène, qui interagissent avec le substrat par l'intermédiaire des interactions de van der Waals. Une feuille unique de la deuxième variété de silice 2D est aussi appelé bi-couche de silice hexagonale (HBS); elle peut comporter une structure ordonnée ou désordonnée (amorphe). La silice 2D a des applications potentielles dans l'électronique comme le plus mince porte diélectrique. Elle peut également être utilisée pour isoler des feuilles de graphène d'un substrat. La silice 2D comporte une structure de bande propre aux semi-conducteurs avec un large gap. Il a notamment été démontré qu'elle appartenait à la famille des matériaux auxétiques, soit ceux avec un coefficient de Poisson négatif. (fr)
- 2D 실리카 (영어:2D Silica)는 이산화 규소의 2차원적인 동질이상이다. 두 종류의 2D 실리카가 있으며 두 종류 모두다 육방정계이다. 하나는 기질과 공유 결합을 하는 사면체에 기반을 두고 있으며, 다른 하나는 기질과 약한 판데르발스 결합을 하는 그래핀과 비슷한 포화 시트로 구성되어 있다. 두번째 2D 실리카의 변형은 HBS(hexagonal bilayer silica)라 불리기도 하며, 배열된 상태와 그렇지 않은(비정질인) 구조를 둘 다 가질 수 있다. 2D실리카는 가장 얇은 로서 전자공학에서 활용될것으로 보인다. 또한 기질로부터의 그래핀의 분리에 사용될 수 있다. (ko)
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