Thermal Stability of Self-Assembled Monolayers of n-Hexanethiol on Au(111)-(1 × 1) and Au(001)-(1 × 1)

Thermal desorption in an ultrahigh vacuum of n-hexanethiol (C6T) self-assembled monolayers (SAMs) prepared from ethanolic solutions on Au(111) and Au(001) unreconstructed surfaces was investigated by X-ray photoelectron spectroscopy. The SAMs desorption was performed from room temperature (RT) to 38...

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Detalles Bibliográficos
Autores principales: Cristina, Lucila Josefina, Ruano Sandoval, Gustavo Daniel, Salvarezza, Roberto Carlos, Ferron, Julio
Formato: Articulo Preprint
Lenguaje:Inglés
Publicado: 2017
Materias:
Física
Química
Gold
Self-assembled monolayers
Thermal desorption
Crystal faces
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/99209
https://ri.conicet.gov.ar/11336/38068
http://pubs.acs.org/doi/10.1021/acs.jpcc.7b05883
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-99209
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Física
Química
Gold
Self-assembled monolayers
Thermal desorption
Crystal faces
spellingShingle Física
Química
Gold
Self-assembled monolayers
Thermal desorption
Crystal faces
Cristina, Lucila Josefina
Ruano Sandoval, Gustavo Daniel
Salvarezza, Roberto Carlos
Ferron, Julio
Thermal Stability of Self-Assembled Monolayers of n-Hexanethiol on Au(111)-(1 × 1) and Au(001)-(1 × 1)
topic_facet Física
Química
Gold
Self-assembled monolayers
Thermal desorption
Crystal faces
description Thermal desorption in an ultrahigh vacuum of n-hexanethiol (C6T) self-assembled monolayers (SAMs) prepared from ethanolic solutions on Au(111) and Au(001) unreconstructed surfaces was investigated by X-ray photoelectron spectroscopy. The SAMs desorption was performed from room temperature (RT) to 380 K. We report that the hexanethiolate surface saturation coverage is bigger (∼0.4 ML) for the SAM on Au(001) than on Au(111) (∼0.33 ML). We identified a greater stability for C6T SAMs on Au(001). Large amounts of physisorbed species were found on preferred oriented (111) polycrystalline Au at the low coverage regime at RT, while the SAM on the Au(001) single crystal at this conditions desorbs at a steady pace. At 340 K, both SAMs remain stable at the coverage expected for the lying-down phases that maximizes the van der Waals interactions. We observe that at higher temperatures the carbon alpha-sulfur bond breaks, producing free S on both gold surfaces.
format Articulo
Preprint
author Cristina, Lucila Josefina
Ruano Sandoval, Gustavo Daniel
Salvarezza, Roberto Carlos
Ferron, Julio
author_facet Cristina, Lucila Josefina
Ruano Sandoval, Gustavo Daniel
Salvarezza, Roberto Carlos
Ferron, Julio
author_sort Cristina, Lucila Josefina
title Thermal Stability of Self-Assembled Monolayers of n-Hexanethiol on Au(111)-(1 × 1) and Au(001)-(1 × 1)
title_short Thermal Stability of Self-Assembled Monolayers of n-Hexanethiol on Au(111)-(1 × 1) and Au(001)-(1 × 1)
title_full Thermal Stability of Self-Assembled Monolayers of n-Hexanethiol on Au(111)-(1 × 1) and Au(001)-(1 × 1)
title_fullStr Thermal Stability of Self-Assembled Monolayers of n-Hexanethiol on Au(111)-(1 × 1) and Au(001)-(1 × 1)
title_full_unstemmed Thermal Stability of Self-Assembled Monolayers of n-Hexanethiol on Au(111)-(1 × 1) and Au(001)-(1 × 1)
title_sort thermal stability of self-assembled monolayers of n-hexanethiol on au(111)-(1 × 1) and au(001)-(1 × 1)
publishDate 2017
url http://sedici.unlp.edu.ar/handle/10915/99209
https://ri.conicet.gov.ar/11336/38068
http://pubs.acs.org/doi/10.1021/acs.jpcc.7b05883
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AT salvarezzarobertocarlos thermalstabilityofselfassembledmonolayersofnhexanethiolonau11111andau00111
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