Cargando…
Evolution of Moiré Profiles from van der Waals Superstructures of Boron Nitride Nanosheets
Two-dimensional (2D) van der Waals (vdW) superstructures, or vdW solids, are formed by the precise restacking of 2D nanosheet lattices, which can lead to unique physical and electronic properties that are not available in the parent nanosheets. Moiré patterns formed by the crystalline mismatch betwe...
Autores principales: | , , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group
2016
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4870578/ https://www.ncbi.nlm.nih.gov/pubmed/27188697 http://dx.doi.org/10.1038/srep26084 |
_version_ | 1782432462169702400 |
---|---|
author | Liao, Yunlong Cao, Wei Connell, John W. Chen, Zhongfang Lin, Yi |
author_facet | Liao, Yunlong Cao, Wei Connell, John W. Chen, Zhongfang Lin, Yi |
author_sort | Liao, Yunlong |
collection | PubMed |
description | Two-dimensional (2D) van der Waals (vdW) superstructures, or vdW solids, are formed by the precise restacking of 2D nanosheet lattices, which can lead to unique physical and electronic properties that are not available in the parent nanosheets. Moiré patterns formed by the crystalline mismatch between adjacent nanosheets are the most direct features for vdW superstructures under microscopic imaging. In this article, transmission electron microscopy (TEM) observation of hexagonal Moiré patterns with unusually large micrometer-sized lateral areas (up to ~1 μm(2)) and periodicities (up to ~50 nm) from restacking of liquid exfoliated hexagonal boron nitride nanosheets (BNNSs) is reported. This observation was attributed to the long range crystallinity and the contaminant-free surfaces of these chemically inert nanosheets. Parallel-line-like Moiré fringes with similarly large periodicities were also observed. The simulations and experiments unambiguously revealed that the hexagonal patterns and the parallel fringes originated from the same rotationally mismatched vdW stacking of BNNSs and can be inter-converted by simply tilting the TEM specimen following designated directions. This finding may pave the way for further structural decoding of other 2D vdW superstructure systems with more complex Moiré images. |
format | Online Article Text |
id | pubmed-4870578 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2016 |
publisher | Nature Publishing Group |
record_format | MEDLINE/PubMed |
spelling | pubmed-48705782016-06-01 Evolution of Moiré Profiles from van der Waals Superstructures of Boron Nitride Nanosheets Liao, Yunlong Cao, Wei Connell, John W. Chen, Zhongfang Lin, Yi Sci Rep Article Two-dimensional (2D) van der Waals (vdW) superstructures, or vdW solids, are formed by the precise restacking of 2D nanosheet lattices, which can lead to unique physical and electronic properties that are not available in the parent nanosheets. Moiré patterns formed by the crystalline mismatch between adjacent nanosheets are the most direct features for vdW superstructures under microscopic imaging. In this article, transmission electron microscopy (TEM) observation of hexagonal Moiré patterns with unusually large micrometer-sized lateral areas (up to ~1 μm(2)) and periodicities (up to ~50 nm) from restacking of liquid exfoliated hexagonal boron nitride nanosheets (BNNSs) is reported. This observation was attributed to the long range crystallinity and the contaminant-free surfaces of these chemically inert nanosheets. Parallel-line-like Moiré fringes with similarly large periodicities were also observed. The simulations and experiments unambiguously revealed that the hexagonal patterns and the parallel fringes originated from the same rotationally mismatched vdW stacking of BNNSs and can be inter-converted by simply tilting the TEM specimen following designated directions. This finding may pave the way for further structural decoding of other 2D vdW superstructure systems with more complex Moiré images. Nature Publishing Group 2016-05-18 /pmc/articles/PMC4870578/ /pubmed/27188697 http://dx.doi.org/10.1038/srep26084 Text en Copyright © 2016, Macmillan Publishers Limited http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ |
spellingShingle | Article Liao, Yunlong Cao, Wei Connell, John W. Chen, Zhongfang Lin, Yi Evolution of Moiré Profiles from van der Waals Superstructures of Boron Nitride Nanosheets |
title | Evolution of Moiré Profiles from van der Waals Superstructures of Boron Nitride Nanosheets |
title_full | Evolution of Moiré Profiles from van der Waals Superstructures of Boron Nitride Nanosheets |
title_fullStr | Evolution of Moiré Profiles from van der Waals Superstructures of Boron Nitride Nanosheets |
title_full_unstemmed | Evolution of Moiré Profiles from van der Waals Superstructures of Boron Nitride Nanosheets |
title_short | Evolution of Moiré Profiles from van der Waals Superstructures of Boron Nitride Nanosheets |
title_sort | evolution of moiré profiles from van der waals superstructures of boron nitride nanosheets |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4870578/ https://www.ncbi.nlm.nih.gov/pubmed/27188697 http://dx.doi.org/10.1038/srep26084 |
work_keys_str_mv | AT liaoyunlong evolutionofmoireprofilesfromvanderwaalssuperstructuresofboronnitridenanosheets AT caowei evolutionofmoireprofilesfromvanderwaalssuperstructuresofboronnitridenanosheets AT connelljohnw evolutionofmoireprofilesfromvanderwaalssuperstructuresofboronnitridenanosheets AT chenzhongfang evolutionofmoireprofilesfromvanderwaalssuperstructuresofboronnitridenanosheets AT linyi evolutionofmoireprofilesfromvanderwaalssuperstructuresofboronnitridenanosheets |