4.8 Article

Edges in bilayered h-BN: insights into the atomic structure

期刊

NANOSCALE
卷 14, 期 38, 页码 14155-14160

出版社

ROYAL SOC CHEMISTRY
DOI: 10.1039/d2nr02818b

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资金

  1. Russian Science Foundation [19-72-10046]
  2. Ministry of science and higher education of the Russian Federation [K6-2022-041]

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This study investigates the connection and defect formation of the edges of bilayered h-BN by analogizing the edge of bilayered h-BN with the interface of monolayer h-BN. The results show that only the zigzag edge can connect defectlessly, while other edges will form a series of tetragonal and octagonal defects. Furthermore, the study predicts the shape of holes in h-BN and demonstrates that the closed edges do not affect the dielectricity of h-BN.
This study is devoted to the study of the edges of bilayered h-BN, whose atomic structure was previously generally unknown. It is shown that the edges tend to connect regardless of the edge cut. A defectless connection can be expected only in the case of a zigzag edge, while in other cases a series of tetragonal and octagonal defects will be formed. This result was obtained by carrying out an analogy between the edge of bilayered h-BN and the interface of monolayer h-BN. Information on the structure and energetics of closed edges allowed us to predict the shape of holes in h-BN, which agreed with the reference experimental data. Finally, it is shown that the closed edges do not create electronic states in the band gap, thus not changing the dielectricity of h-BN.

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