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Mechanical properties of atomically thin boron nitride and the role of interlayer interactions

Author(s)
Falin, AlekseyCai, QiranSantos, Elton J. G.Scullion, DeclanQian, DongZhang, RuiYang, ZhiHuang, ShaomingWatanabe, KenjiTaniguchi, TakashiBarnett, Matthew R.Chen, YingRuoff, Rodney S.Li, Lu Hua
Issued Date
2017-06
DOI
10.1038/ncomms15815
URI
https://scholarworks.unist.ac.kr/handle/201301/22330
Fulltext
https://www.nature.com/articles/ncomms15815
Citation
NATURE COMMUNICATIONS, v.8, pp.15815
Abstract
Atomically thin boron nitride (BN) nanosheets are important two-dimensional nanomaterials with many unique properties distinct from those of graphene, but investigation into their mechanical properties remains incomplete. Here we report that high-quality single-crystalline mono-and few-layer BN nanosheets are one of the strongest electrically insulating materials. More intriguingly, few-layer BN shows mechanical behaviours quite different from those of few-layer graphene under indentation. In striking contrast to graphene, whose strength decreases by more than 30% when the number of layers increases from 1 to 8, the mechanical strength of BN nanosheets is not sensitive to increasing thickness. We attribute this difference to the distinct interlayer interactions and hence sliding tendencies in these two materials under indentation. The significantly better interlayer integrity of BN nanosheets makes them a more attractive candidate than graphene for several applications, for example, as mechanical reinforcements.
Publisher
NATURE PUBLISHING GROUP
ISSN
2041-1723
Keyword
AUGMENTED-WAVE METHODELASTIC PROPERTIESAB-INITIOGRAPHENE MEMBRANESINTRINSIC STRENGTHMOLECULAR-DYNAMICSRAMAN-SPECTROSCOPYNANOSHEETSSHEETSMOS2

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