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Título: | Modifications in graphene electron states due to a deposited lattice of Au nanoparticles : density functional calculations. |
Autor(es): | Carara, Sabrina Silva Batista, Ronaldo Junio Campos Chacham, Helio |
Data do documento: | 2009 |
Referência: | CARARA, S. S.; BATISTA, R. J. C.; CHACHAM, H. Modifications in graphene electron states due to a deposited lattice of Au nanoparticles: density functional calculations. Physical Review. B, Condensed Matter and Materials Physics, v. 80, p. 115435, 2009. Disponível em: <http://journals.aps.org/prb/pdf/10.1103/PhysRevB.80.115435>. Acesso em: 24 fev. 2015. |
Resumo: | We perform first-principles investigations of two-dimensional, triangular lattices of Au38 nanoparticles deposited on a graphene layer. We find that lattices of thiolate-covered nanoparticles cause electronic structure modifications in graphene such as minigaps, charge transfer, and new Dirac points, but graphene remains metallic. In contrast, for a moderate coverage of nanoparticles __0.2 nm−2_, a lattice of bare _noncovered_ Au nanoparticles may induce periodic deformations on the graphene layer leading to the opening of a band gap of a few tens of meV at the Dirac point, in such a way that a properly charged system might become a semiconductor. |
URI: | http://www.repositorio.ufop.br/handle/123456789/4623 |
DOI: | http://dx.doi.org/10.1103/PhysRevB.80.115435 |
ISSN: | 1550-235X |
Licença: | O periódico Physical Review B permite o arquivamento da versão/PDF do editor no Repositório Institucional. Fonte: Sherpa/Romeo <http://www.sherpa.ac.uk/romeo/search.php?issn=0163-1829>. Acesso em: 03 jan. 2017. |
Aparece nas coleções: | DEFIS - Artigos publicados em periódicos |
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ARTIGO_ModificationsGrapheneElectron.pdf | 1,99 MB | Adobe PDF | Visualizar/Abrir |
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