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https://hdl.handle.net/1822/85666
Título: | Atomic electrostatic maps of point defects in MoS2 |
Autor(es): | Velasco, Sebastian Calderon Ferreira, Rafael V. Taneja, Deepyanti Jayanth, Raghavendrarao T. Zhou, Langyan Ribeiro, R. M. Akinwande, Deji Ferreira, Paulo J. |
Palavras-chave: | Monolayer molybdenum disulphide point defects atomic resolution imaging differential phase contrast monolayer molybdenum disulfide |
Data: | 30-Nov-2021 |
Editora: | American Chemical Society |
Revista: | Nano Letters |
Citação: | Calderon V, S., Ferreira, R. V., Taneja, D., Jayanth, R., Zhou, L., Ribeiro, R. M., … Ferreira, P. J. (2021, November 30). Atomic Electrostatic Maps of Point Defects in MoS2. Nano Letters. American Chemical Society (ACS). http://doi.org/10.1021/acs.nanolett.1c02334 |
Resumo(s): | In this study, we use differential phase contrast images obtained by scanning transmission electron microscopy combined with computer simulations to map the atomic electrostatic fields of MoS2 monolayers and investigate the effect of sulphur monovacancies and divancancies on the atomic electric field and total charge distribution. A significant redistribution of the electric field in the regions containing defects is observed, with a progressive decrease in the strength of the projected electric field for each sulphur atom removed from its position. The electric field strength at the sulphur monovacancy sites is reduced by approximately 50% and nearly vanishes at the divacancy sites, where it drops to around 15% of the original value, demonstrating the tendency of these defects to attract positively charged ions or particles. In addition, the absence of the sulphur atoms leads to an inversion in the polarity of the total charge distribution in these regions. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/85666 |
DOI: | 10.1021/acs.nanolett.1c02334 |
ISSN: | 1530-6984 |
Versão da editora: | https://pubs.acs.org/doi/10.1021/acs.nanolett.1c02334 |
Arbitragem científica: | yes |
Acesso: | Acesso aberto |
Aparece nas coleções: | CDF - CEP - Artigos/Papers (with refereeing) |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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Atomic electrostatic maps of point defects in MoS2.pdf | 1,83 MB | Adobe PDF | Ver/Abrir |