Artículo
Thiol Adsorption on the Au(100)-hex and Au(100)-(1 × 1) Surfaces
Grumelli, Doris Elda
; Cristina, Lucila Josefina
; Lobo Maza, Flavia Emilia
; Carro, Pilar; Ferron, Julio
; Kern, Klaus; Salvarezza, Roberto Carlos
Fecha de publicación:
06/2015
Editorial:
American Chemical Society
Revista:
Journal of Physical Chemistry C
ISSN:
1932-7447
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Alkanethiol adsorption on the Au(100) surfaces is studied by using scanning tunneling microscopy, X-ray photoelectron spectroscopy, and electrochemical techniques. Adsorption of hexanethiol (HT) on the Au(100)-hex surface results in the formation of elongated Au islands following the typical stripes of the reconstruction. Ordered molecular arrays forming hexagonally distorted square patterns cover the stripes with surface coverage ≈0.33. On the other hand, HT adsorption on the Au(100)-(1 × 1) surface shows the absence of the elongated island and the formation of square molecular patterns with a surface coverage ≈0.44. The core level shift of thiolates adsorbed on the Au(100)-(1 × 1) and Au(111) is only 0.15 eV, suggesting that chemistry rather than surface sites determines the binding energy of the S 2p core level. These results are also important to complete our knowledge of the chemistry and surface structure for small thiolated AuNPs where the Au(100) together with the Au(111) are the dominant faces.
Palabras clave:
Hexanethiol
,
Au(100)
,
Adsorption
,
Surfaces
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Licencia
Identificadores
Colecciones
Articulos(IFIS - LITORAL)
Articulos de INST.DE FISICA DEL LITORAL
Articulos de INST.DE FISICA DEL LITORAL
Citación
Grumelli, Doris Elda; Cristina, Lucila Josefina; Lobo Maza, Flavia Emilia; Carro, Pilar; Ferron, Julio; et al.; Thiol Adsorption on the Au(100)-hex and Au(100)-(1 × 1) Surfaces; American Chemical Society; Journal of Physical Chemistry C; 119; 25; 6-2015; 14248-14254
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