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dc.contributor.authorWang, Weimiao
dc.contributor.authorLi, Zheling; orcid: 0000-0001-8412-0234
dc.contributor.authorMarsden, Alex J; orcid: 0000-0002-3017-1754
dc.contributor.authorBissett, Mark A; orcid: 0000-0002-8908-7960
dc.contributor.authorYoung, Robert J; orcid: 0000-0001-6073-9489; email: robert.young@manchester.ac.uk
dc.date.accessioned2021-06-30T16:08:04Z
dc.date.available2021-06-30T16:08:04Z
dc.date.issued2021-06-30
dc.date.submitted2021-03-18
dc.identifierhttps://chesterrep.openrepository.com/bitstream/handle/10034/625096/metadata.xml?sequence=2
dc.identifierhttps://chesterrep.openrepository.com/bitstream/handle/10034/625096/pdf.pdf?sequence=3
dc.identifier.citation2D Materials, volume 8, issue 3, page 035058
dc.identifier.urihttp://hdl.handle.net/10034/625096
dc.descriptionFrom IOP Publishing via Jisc Publications Router
dc.descriptionHistory: received 2021-03-18, revised 2021-06-03, accepted 2021-06-16, oa-requested 2021-06-17, epub 2021-06-30, open-access 2021-06-30, ppub 2021-07
dc.descriptionPublication status: Published
dc.descriptionFunder: Henry Royce Institute; doi: http://dx.doi.org/10.13039/100016128
dc.descriptionFunder: China Scholarship Council; doi: http://dx.doi.org/10.13039/501100004543
dc.description.abstractAbstract: Stress transfer has been investigated for exfoliated hexagonal boron nitride (hBN) nanosheets (BNNSs) through the use of Raman spectroscopy. Single BNNSs of different thicknesses of up to 100 nm (300 layers) were deposited upon a poly(methyl methacrylate) (PMMA) substrate and deformed in unixial tension. The Raman spectra from the BNNSs were relatively weak compared to graphene, but the in-plane E2g Raman mode (the G band) could be distinguished from the spectrum of the PMMA substrate. It was found that G band down-shifted during tensile deformation and that the rate of band shift per unit strain decreased as the thickness of the BNNSs increased, as is found for multi-layer graphene. The efficiency of internal stress transfer between the different hBN layers was found to be of the order of 99% compared to 60%–80% for graphene, as a result of the stronger bonding between the hBN layers in the BNNSs. The reduction in bandshift rate can be related to the effective Young’s modulus of the 2D material in a nanocomposites and the findings show that it would be expected that even 100 layer BNNSs should have a Young’s modulus of more than half that of hBN monolayer. Interfacial stress transfer between a single hBN nanosheet and the PMMA substrate has been evaluated using shear lag theory. It is found that the interfacial shear stress between the BNNS and the substrate is of the order of 10 MPa, a factor of around 4 higher than that for a graphene monolayer. These findings imply that BNNSs should give better mechanical reinforcement than graphene in polymer-based nanocomposites as a result of good internal interlayer stress transfer within the nanosheets and better interfacial stress transfer to the polymer matrix.
dc.languageen
dc.publisherIOP Publishing
dc.rightsLicence for this article: http://creativecommons.org/licenses/by/4.0
dc.sourceeissn: 2053-1583
dc.subjectPaper
dc.subjecthBN nanosheets
dc.subjectdeformation
dc.subjectstress transfer
dc.subjectRaman spectroscopy
dc.titleInterlayer and interfacial stress transfer in hBN nanosheets
dc.typearticle
dc.date.updated2021-06-30T16:08:04Z
dc.date.accepted2021-06-16


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