Hard, transparent, sp3 -containing 2D phase formed from few-layer graphene under compression.

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Autor(es): dc.creatorMartins, Luiz Gustavo Pimenta-
Autor(es): dc.creatorSilva, Diego L.-
Autor(es): dc.creatorSmith, Jesse S.-
Autor(es): dc.creatorLu, Ang-Yu-
Autor(es): dc.creatorSu, Cong-
Autor(es): dc.creatorHempel, Marek-
Autor(es): dc.creatorOcchialini, Connor-
Autor(es): dc.creatorJi, Xiang-
Autor(es): dc.creatorPablo, Ricardo-
Autor(es): dc.creatorAlencar, Rafael Silva-
Autor(es): dc.creatorSouza, Alan Custodio dos Reis-
Autor(es): dc.creatorPinto, Alysson Alves-
Autor(es): dc.creatorOliveira, Alan Barros de-
Autor(es): dc.creatorBatista, Ronaldo Junio Campos-
Autor(es): dc.creatorPalacios, Tomas-
Autor(es): dc.creatorMazzoni, Mário Sérgio de Carvalho-
Autor(es): dc.creatorMatos, Matheus Josué de Souza-
Autor(es): dc.creatorComin, Riccardo-
Autor(es): dc.creatorKong, Jing-
Autor(es): dc.creatorCançado, Luiz Gustavo de Oliveira Lopes-
Data de aceite: dc.date.accessioned2025-08-21T15:39:52Z-
Data de disponibilização: dc.date.available2025-08-21T15:39:52Z-
Data de envio: dc.date.issued2022-03-08-
Data de envio: dc.date.issued2022-03-08-
Data de envio: dc.date.issued2020-
Fonte completa do material: dc.identifierhttp://www.repositorio.ufop.br/jspui/handle/123456789/14645-
Fonte completa do material: dc.identifierhttps://www.sciencedirect.com/science/article/abs/pii/S0008622320311179-
Fonte completa do material: dc.identifierhttps://doi.org/10.1016/j.carbon.2020.11.038-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/capes/1020999-
Descrição: dc.descriptionDespite several theoretically proposed two-dimensional (2D) diamond structures, experimental efforts to obtain such structures are in initial stage. Recent high-pressure experiments provided significant advancements in the field, however, expected properties of a 2D-like diamond such as sp3 content, transparency and hardness, have not been observed together in a compressed graphene system. Here, we compress few-layer graphene samples on SiO2/Si substrate in water and provide experimental evidence for the formation of a quenchable hard, transparent, sp3 -containing 2D phase. Our Raman spectroscopy data indicates phase transition and a surprisingly similar critical pressure for two-, five-layer graphene and graphite in the 4e6 GPa range, as evidenced by changes in several Raman features, combined with a lack of evidence of significant pressure gradients or local non-hydrostatic stress components of the pressure medium up to z 8 GPa. The new phase is transparent and hard, as evidenced from indentation marks on the SiO2 substrate, a material considerably harder than graphene systems. Furthermore, we report the lowest critical pressure (z 4 GPa) in graphite, which we attribute to the role of water in facilitating the phase transition. Theoretical calculations and experimental data indicate a novel, surfaceto-bulk phase transition mechanism that gives hint of diamondene formation.-
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Idioma: dc.languageen-
Direitos: dc.rightsrestrito-
Título: dc.titleHard, transparent, sp3 -containing 2D phase formed from few-layer graphene under compression.-
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