期刊
NATURE COMMUNICATIONS
卷 5, 期 -, 页码 -出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/ncomms4113
关键词
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资金
- National Science Foundation [CHE-1263745, OCI-1053575]
- Department of Energy's Office of Biological and Environmental Research
- Direct For Mathematical & Physical Scien [1263745] Funding Source: National Science Foundation
Boron is carbon's neighbour in the periodic table and has similar valence orbitals. However, boron cannot form graphene-like structures with a honeycomb hexagonal framework because of its electron deficiency. Computational studies suggest that extended boron sheets with partially filled hexagonal holes are stable; however, there has been no experimental evidence for such atom-thin boron nanostructures. Here, we show experimentally and theoretically that B-36 is a highly stable quasiplanar boron cluster with a central hexagonal hole, providing the first experimental evidence that single-atom layer boron sheets with hexagonal vacancies are potentially viable. Photoelectron spectroscopy of B-36(-) reveals a relatively simple spectrum, suggesting a symmetric cluster. Global minimum searches for B-36(-) lead to a quasiplanar structure with a central hexagonal hole. Neutral B-36 is the smallest boron cluster to have sixfold symmetry and a perfect hexagonal vacancy, and it can be viewed as a potential basis for extended two-dimensional boron sheets.
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