Double-spiral hexagonal boron nitride and shear strained coalescence boundary

Among the different growth mechanisms for two-dimensional (2D) hexagonal boron nitride (h-BN) synthesized using chemical vapor deposition, spiraling growth of h-BN has not been reported. Here we report the formation of intertwined double-spiral few-layer h-BN that is driven by screw dislocations loc...

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Main Authors: Park, Hyo Ju, Tay, Roland Yingjie, Wang, Xiao, Zhao, Wen, Kim, Jung Hwa, Ruoff, Rodney S., Ding, Feng, Teo, Edwin Hang Tong, Lee, Zonghoon
Other Authors: School of Electrical and Electronic Engineering
Format: Article
Language:English
Published: 2020
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Online Access:https://hdl.handle.net/10356/143560
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-1435602020-09-09T05:43:28Z Double-spiral hexagonal boron nitride and shear strained coalescence boundary Park, Hyo Ju Tay, Roland Yingjie Wang, Xiao Zhao, Wen Kim, Jung Hwa Ruoff, Rodney S. Ding, Feng Teo, Edwin Hang Tong Lee, Zonghoon School of Electrical and Electronic Engineering School of Materials Science and Engineering Temasek Laboratories Engineering::Electrical and electronic engineering Hexagonal Boron Nitride Growth Mechanism Among the different growth mechanisms for two-dimensional (2D) hexagonal boron nitride (h-BN) synthesized using chemical vapor deposition, spiraling growth of h-BN has not been reported. Here we report the formation of intertwined double-spiral few-layer h-BN that is driven by screw dislocations located at the antiphase boundaries of monolayer domains. The microstructure and stacking configurations were studied using a combination of dark-field and atomic resolution transmission electron microscopy. Distinct from other 2D materials with single-spiral structures, the double-spiral structure enables the intertwined h-BN layers to preserve the most stable AA′ stacking configuration. We also found that the occurrence of shear strains at the boundaries of merged spiral islands is dependent on the propagation directions of encountering screw dislocations and presented the strained features by density functional theory calculations and atomic image simulations. This study unveils the double-spiral growth of 2D h-BN multilayers and the creation of a shear strain band at the coalescence boundary of two h-BN spiral clusters. National Research Foundation (NRF) Accepted version This work was supported by IBS-R019-D1, the National Research Foundation (NRF) grant funded by the Korea government (MSIT) (2018R1A2A2A05019598), and the NRF-ANR Joint (NRF2016-NRF-ANR001). 2020-09-09T05:43:27Z 2020-09-09T05:43:27Z 2019 Journal Article Park, H. J., Tay, R. Y., Wang, X., Zhao, W., Kim, J. H., Ruoff, R. S., . . . Lee, Z. (2019). Double-spiral hexagonal boron nitride and shear strained coalescence boundary. Nano Letters, 19(7), 4229-4236. doi:10.1021/acs.nanolett.8b05034 1530-6984 https://hdl.handle.net/10356/143560 10.1021/acs.nanolett.8b05034 30844285 7 19 4229 4236 en Nano letters This document is the Accepted Manuscript version of a Published Work that appeared in final form in Nano letters, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/acs.nanolett.8b05034 application/pdf
institution Nanyang Technological University
building NTU Library
country Singapore
collection DR-NTU
language English
topic Engineering::Electrical and electronic engineering
Hexagonal Boron Nitride
Growth Mechanism
spellingShingle Engineering::Electrical and electronic engineering
Hexagonal Boron Nitride
Growth Mechanism
Park, Hyo Ju
Tay, Roland Yingjie
Wang, Xiao
Zhao, Wen
Kim, Jung Hwa
Ruoff, Rodney S.
Ding, Feng
Teo, Edwin Hang Tong
Lee, Zonghoon
Double-spiral hexagonal boron nitride and shear strained coalescence boundary
description Among the different growth mechanisms for two-dimensional (2D) hexagonal boron nitride (h-BN) synthesized using chemical vapor deposition, spiraling growth of h-BN has not been reported. Here we report the formation of intertwined double-spiral few-layer h-BN that is driven by screw dislocations located at the antiphase boundaries of monolayer domains. The microstructure and stacking configurations were studied using a combination of dark-field and atomic resolution transmission electron microscopy. Distinct from other 2D materials with single-spiral structures, the double-spiral structure enables the intertwined h-BN layers to preserve the most stable AA′ stacking configuration. We also found that the occurrence of shear strains at the boundaries of merged spiral islands is dependent on the propagation directions of encountering screw dislocations and presented the strained features by density functional theory calculations and atomic image simulations. This study unveils the double-spiral growth of 2D h-BN multilayers and the creation of a shear strain band at the coalescence boundary of two h-BN spiral clusters.
author2 School of Electrical and Electronic Engineering
author_facet School of Electrical and Electronic Engineering
Park, Hyo Ju
Tay, Roland Yingjie
Wang, Xiao
Zhao, Wen
Kim, Jung Hwa
Ruoff, Rodney S.
Ding, Feng
Teo, Edwin Hang Tong
Lee, Zonghoon
format Article
author Park, Hyo Ju
Tay, Roland Yingjie
Wang, Xiao
Zhao, Wen
Kim, Jung Hwa
Ruoff, Rodney S.
Ding, Feng
Teo, Edwin Hang Tong
Lee, Zonghoon
author_sort Park, Hyo Ju
title Double-spiral hexagonal boron nitride and shear strained coalescence boundary
title_short Double-spiral hexagonal boron nitride and shear strained coalescence boundary
title_full Double-spiral hexagonal boron nitride and shear strained coalescence boundary
title_fullStr Double-spiral hexagonal boron nitride and shear strained coalescence boundary
title_full_unstemmed Double-spiral hexagonal boron nitride and shear strained coalescence boundary
title_sort double-spiral hexagonal boron nitride and shear strained coalescence boundary
publishDate 2020
url https://hdl.handle.net/10356/143560
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