A density functional theory study of the reconstruction of gold (111) surfaces

We studied (p × √3) gold (111) surface reconstructions within the DFT/PW91 approximation. Our findings clearly show that the reconstruction is energetically favorable in unreconstructed surfaces equal to or larger than the unit cell of the final reconstructed surface. Reconstructions in surfaces sma...

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Autores:
Tipo de recurso:
Fecha de publicación:
2014
Institución:
Universidad Tecnológica de Bolívar
Repositorio:
Repositorio Institucional UTB
Idioma:
eng
OAI Identifier:
oai:repositorio.utb.edu.co:20.500.12585/9035
Acceso en línea:
https://hdl.handle.net/20.500.12585/9035
Palabra clave:
Gold
Density functional theory studies
Gold particles
Reconstructed surfaces
Sub nanometers
Type reconstruction
Unit cells
Repair
Rights
restrictedAccess
License
http://creativecommons.org/licenses/by-nc-nd/4.0/
Description
Summary:We studied (p × √3) gold (111) surface reconstructions within the DFT/PW91 approximation. Our findings clearly show that the reconstruction is energetically favorable in unreconstructed surfaces equal to or larger than the unit cell of the final reconstructed surface. Reconstructions in surfaces smaller than ∼2.95 nm in the [11̄0] direction are not more stable than the unreconstructed surface, and this may explain why (p × √3) type reconstructions have not been observed in subnanometer gold particles. We found that reconstructions with (22 × √3) and (23 × √3) unit cells, usually reported in experiments, are isoenergetic. © 2014 American Chemical Society.