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borophene
Borophene is a proposed crystalline allotrope of boron. One unit consists of 36 atoms arranged in an 2-dimensional sheet with a hexagonal hole in the middle.
== Theory ==
Computational studies suggested that extended borophene sheets with partially filled hexagonal holes are stable. Global minimum searches for lead to a quasiplanar structure with a central hexagonal hole. Borophene is predicted to be fully metallic.〔
Borophene is analogous to graphene in that it is expected to form extended sheets. The latter is a semi-metal, implying that borophene may be a better conductor. The boron-boron bond is also nearly as strong as graphene’s carbon-carbon bond.〔
Boron is adjacent to carbon in the periodic table and has similar valence orbitals. Unlike carbon, boron cannot form a honeycomb hexagonal framework (like graphene) because of its electron deficiency.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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