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http://hdl.handle.net/1843/43953| Type: | Artigo de Periódico |
| Title: | Nanomechanics of few-layer materials: do individual layers slide upon folding? |
| Authors: | Ronaldo Junio Campos Batista Luiz Gustavo de Oliveira Lopes Cançado Ado Jorio de Vasconcelos Helio Chacham Bernardo Ruegger Almeida Neves Rafael Freitas Dias Ana Paula Moreira Barboza Alan Barros de Oliveira Taíse Matte Manhabosco Thiago Rodrigo Gomes da Silva Matheus Josué de Souza Matos Andreij de Carvalho Gadelha Cassiano Rabelo e Silva |
| Abstract: | 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 ∝ n3 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. |
| Subject: | Materiais nanoestruturados Espectroscopia de Raman |
| language: | eng |
| metadata.dc.publisher.country: | Brasil |
| Publisher: | Universidade Federal de Minas Gerais |
| Publisher Initials: | UFMG |
| metadata.dc.publisher.department: | ICX - DEPARTAMENTO DE FÍSICA |
| Rights: | Acesso Aberto |
| metadata.dc.identifier.doi: | https://doi.org/10.3762/bjnano.11.162 |
| URI: | http://hdl.handle.net/1843/43953 |
| Issue Date: | 30-Nov-2020 |
| metadata.dc.url.externa: | https://www.beilstein-journals.org/bjnano/articles/11/162 |
| metadata.dc.relation.ispartof: | Beilstein Journal of Nanotechnology |
| Appears in Collections: | Artigo de Periódico |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| Nanomechanics of few-layer materials do individual layers pdfa.pdf | 1.18 MB | Adobe PDF | View/Open |
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