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Article Dans Une Revue Surface Science : A Journal Devoted to the Physics and Chemistry of Interfaces Année : 2007

Adsorption properties of decyl thiocyanate and decanethiol on platinum substrates studied by sum-frequency generation spectroscopy

Y. Sartenaer
  • Fonction : Auteur
L. Dreesen
  • Fonction : Auteur
C. Humbert
C. Volcke
  • Fonction : Auteur
P. Louette
  • Fonction : Auteur
P. A. Thiry
  • Fonction : Auteur
A. Peremans
  • Fonction : Auteur

Résumé

Recently, thiocyanate groups were successfully used as precursors for thiolate assemblies. Indeed, they provide a useful alternative to thiol groups for self-assembly on metallic substrates. In order to check the adsorption properties and the quality of the thiocyanate-based self-assembled monolayers (SAMs), we use sum-frequency generation spectroscopy (SFG) and apply it to characterize the ad-layers of two similar molecules: decanethiol (DT) and decyl thiocyanate (DTCN) adsorbed on platinum surfaces. By comparing the SFG signals of the methyl and methylene vibration modes, we show that DTCN SAMs are less ordered than DT ones. These effects are related to the SAMs quality which depends on the molecular packing as highlighted by scanning tunnelling microscopy and X-ray photoelectron spectroscopy.

Dates et versions

hal-00180296 , version 1 (18-10-2007)

Identifiants

Citer

Y. Sartenaer, L. Dreesen, C. Humbert, C. Volcke, G. Tourillon, et al.. Adsorption properties of decyl thiocyanate and decanethiol on platinum substrates studied by sum-frequency generation spectroscopy. Surface Science : A Journal Devoted to the Physics and Chemistry of Interfaces, 2007, 601, pp.1259-1264. ⟨10.1016/j.susc.2006.12.066⟩. ⟨hal-00180296⟩
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