Experimental realization of two-dimensional boron sheets.

By B. Feng, Jin Zhang, Q. Zhong, Wenbin Li, Shuai Li, Hui Li, Peng Cheng, S. Meng, Lan Chen, Kehui Wu. Nature Chemistry, 2015

1,549 citations recorded by the source corpus.

A variety of two-dimensional materials have been reported in recent years, yet single-element systems such as graphene and black phosphorus have remained rare. Boron analogues have been predicted, as boron atoms possess a short covalent radius and the flexibility to adopt sp(2) hybridization, features that favour the formation of two-dimensional allotropes, and one example of such a borophene material has been reported recently. Here, we present a parallel experimental work showing that two-dimensional boron sheets can be grown epitaxially on a Ag(111) substrate. Two types of boron sheet, a β12 sheet and a χ3 sheet, both exhibiting a triangular lattice but with different arrangements of periodic holes, are observed by scanning tunnelling microscopy. Density functional theory simulations agree well with experiments, and indicate that both sheets are planar without obvious vertical undulations. The boron sheets are quite inert to oxidization and interact only weakly with their substrate. We envisage that such boron sheets may find applications in electronic devices in the future.

Subfields: Computational Mechanics, Materials Chemistry, Radiology, Nuclear Medicine and Imaging

View Paper: https://www.semanticscholar.org/paper/2ef78789e75bbfb4ac226b07e61d600fb57cac81

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In Materials Chemistry

1. Yuanfeng Xu
2. Hao Zhang
3. Bo Peng
4. Hezhu Shao
5. Heyuan Zhu

Citations in the corpus

• Direct evidence of metallic bands in a monolayer boron sheet (2015, methodology): “ulty in the synthesis of materials. We prepare monolayer boron sheet by directly evaporating boron (99.9999%) on Ag(111) substrate. The details for the sample preparation have been reported elsewhere [29]. From the XPS data in Fig.S1, there are only peaks from the core levels of Ag and B, which mean”