We report a study of the self-assembly of 1,4-benzenedimethanethiol monolayers on gold formed in n-hexane solution held at 60 °C for 30 min and in dark conditions. The valence band characteristics, the thickness of the layer, and the orientation of the molecules were analyzed at a synchrotron using high resolution photoelectron spectroscopy and near edge X-ray adsorption spectroscopy. These measurements unambiguously attest the formation of a single layer with molecules arranged in the upright position and presenting a free SH group at the outer interface. Near edge X-ray absorption fine structure (NEXAFS) measurements suggest that the molecular axis is oriented at 24° with respect to the surface normal. In addition, valence band features could be successfully associated to specific molecular orbital contributions thanks to the comparison with theoretically calculated density of states projected on the different molecular units.

UPS, XPS, and NEXAFS Study of Self-Assembly of Standing 1,4 Benzenedimethanethiol SAMs on Gold / PASQUALI, Luca; TERZI, Fabio; SEEBER, Renato; NANNARONE, Stefano; D., Datta; C., Dablemont; H., Hamoudi; M., Canepa; V. A., Esaulov. - In: LANGMUIR. - ISSN 0743-7463. - STAMPA. - 27:(2011), pp. 4713-4720. [10.1021/la105063u]

UPS, XPS, and NEXAFS Study of Self-Assembly of Standing 1,4 Benzenedimethanethiol SAMs on Gold

PASQUALI, Luca;TERZI, Fabio;SEEBER, Renato;NANNARONE, Stefano;
2011

Abstract

We report a study of the self-assembly of 1,4-benzenedimethanethiol monolayers on gold formed in n-hexane solution held at 60 °C for 30 min and in dark conditions. The valence band characteristics, the thickness of the layer, and the orientation of the molecules were analyzed at a synchrotron using high resolution photoelectron spectroscopy and near edge X-ray adsorption spectroscopy. These measurements unambiguously attest the formation of a single layer with molecules arranged in the upright position and presenting a free SH group at the outer interface. Near edge X-ray absorption fine structure (NEXAFS) measurements suggest that the molecular axis is oriented at 24° with respect to the surface normal. In addition, valence band features could be successfully associated to specific molecular orbital contributions thanks to the comparison with theoretically calculated density of states projected on the different molecular units.
2011
27
4713
4720
UPS, XPS, and NEXAFS Study of Self-Assembly of Standing 1,4 Benzenedimethanethiol SAMs on Gold / PASQUALI, Luca; TERZI, Fabio; SEEBER, Renato; NANNARONE, Stefano; D., Datta; C., Dablemont; H., Hamoudi; M., Canepa; V. A., Esaulov. - In: LANGMUIR. - ISSN 0743-7463. - STAMPA. - 27:(2011), pp. 4713-4720. [10.1021/la105063u]
PASQUALI, Luca; TERZI, Fabio; SEEBER, Renato; NANNARONE, Stefano; D., Datta; C., Dablemont; H., Hamoudi; M., Canepa; V. A., Esaulov
File in questo prodotto:
File Dimensione Formato  
langmuir BDMT 2011.pdf

Accesso riservato

Descrizione: Articolo principale
Tipologia: Versione pubblicata dall'editore
Dimensione 2.87 MB
Formato Adobe PDF
2.87 MB Adobe PDF   Visualizza/Apri   Richiedi una copia
Pubblicazioni consigliate

Licenza Creative Commons
I metadati presenti in IRIS UNIMORE sono rilasciati con licenza Creative Commons CC0 1.0 Universal, mentre i file delle pubblicazioni sono rilasciati con licenza Attribuzione 4.0 Internazionale (CC BY 4.0), salvo diversa indicazione.
In caso di violazione di copyright, contattare Supporto Iris

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11380/659436
Citazioni
  • ???jsp.display-item.citation.pmc??? 3
  • Scopus 59
  • ???jsp.display-item.citation.isi??? 58
social impact