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Título: | Nanomechanics of few-layer materials : do individual layers slide upon folding? |
Autor(es): | Batista, Ronaldo Junio Campos Dias, Rafael Freitas Barboza, Ana Paula Moreira Oliveira, Alan Barros de Manhabosco, Taíse Matte Silva, Thiago R. Gomes Matos, Matheus Josué de Souza Gadelha, Andreij de Carvalho Rabelo, Cassiano Cançado, Luiz Gustavo de Oliveira Lopes Jorio, Ado Chacham, Helio Neves, Bernardo Ruegger Almeida |
Palavras-chave: | Analytical methods Atomic force microscopy (AFM) Molecular dynamics (MD) Raman spectroscopy Nanostructured materials |
Data do documento: | 2020 |
Referência: | BATISTA, R. J. C. et al. Nanomechanics of few-layer materials: do individual layers slide upon folding?. Beilstein Journal of Nanotechnology, v. 11, p. 1801-1808, 2020. Disponível em: <https://www.beilstein-journals.org/bjnano/articles/11/162>. Acesso em: 25 ago. 2021. |
Resumo: | Folds naturally appear on nanometrically thin materials, also called “2D materials”, after exfoliation, eventually creating folded edges across the resulting flakes. We investigate the adhesion and flexural properties of single-layered and multilayered 2D materials upon folding in the present work. This is accomplished by measuring and modeling mechanical properties of folded edges, which allows for the experimental determination of the bending stiffness (κ) of multilayered 2D materials as a function of the number of layers (n). In the case of talc, we obtain κ ∝ n 3 for n ≥ 5, indicating no interlayer sliding upon folding, at least in this thickness range. In contrast, tip-enhanced Raman spectroscopy measurements on edges in folded graphene flakes, 14 layers thick, show no significant strain. This indicates that layers in graphene flakes, up to 5 nm thick, can still slip to relieve stress, showing the richness of the effect in 2D systems. The obtained interlayer adhesion energy for graphene (0.25 N/m) and talc (0.62 N/m) is in good agreement with recent experimental results and theoretical predictions. The obtained value for the adhesion energy of graphene on a silicon substrate is also in agreement with previous results. |
URI: | http://www.repositorio.ufop.br/jspui/handle/123456789/14647 |
DOI: | https://doi.org/10.3762/bxiv.2020.91.v1 |
ISSN: | 2190-4286 |
Licença: | This is an Open Access article under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0). Fonte: o PDF do artigo. |
Aparece nas coleções: | DEFIS - Artigos publicados em periódicos |
Arquivos associados a este item:
Arquivo | Descrição | Tamanho | Formato | |
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ARTIGO_NanomechanicsFewLayer.pdf | 2,55 MB | Adobe PDF | Visualizar/Abrir |
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