HREELS study of the adsorption mechanism and orientational order of thione molecules on Cu(100) (Articolo in rivista)

Type

• Prodotto della ricerca (Classe)
• Articolo in rivista (Classe)

Label

• HREELS study of the adsorption mechanism and orientational order of thione molecules on Cu(100) (Articolo in rivista) (literal)

Anno

• 2003-01-01T00:00:00+01:00 (literal)

Alternative label

• Allegretti F., De Renzi V., Biagi R., del Pennino U., Contini G., Di Castro V., Mariani C., Betti M.G., Fontanesi C. (2003)
  HREELS study of the adsorption mechanism and orientational order of thione molecules on Cu(100)
  in Surface science
  (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori

• Allegretti F., De Renzi V., Biagi R., del Pennino U., Contini G., Di Castro V., Mariani C., Betti M.G., Fontanesi C. (literal)

Pagina inizio

• 63 (literal)

Pagina fine

• 71 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume

• 539 (literal)

Rivista

• Surface science (Rivista)

Note

• ISI Web of Science (WOS) (literal)

Titolo

• HREELS study of the adsorption mechanism and orientational order of thione molecules on Cu(100) (literal)

Abstract

• Organic molecules with sulfur-containing headgroups interacting with noble metal surfaces represent a fruitful class of systems with potential relevance in new device technology. Within this context, the room temperature adsorption of 2-mercaptobenzoxazole (MBO) on the Cu(100) surface has been studied by high-resolution electron energy-loss spectroscopy (HREELS) as a function of molecular exposure. At low coverage, the HREEL spectra present only one mode at 93 meV (750 cm-1), which is attributed to the out-of-plane C–H bending gCH. Its off-specular angular dependence indicates that the molecules lie almost flat on the surface. At higher coverage, the MBO layer orders in a p(2¥2) superstructure, and energy loss peaks at higher energies appear. These features can be assigned to in-plane vibrations indicating that the molecular axis tilts toward a more vertical position, thus allowing a closer molecular packing. Assignment of the HREELS peaks is confirmed by estimation of the gas phase normal modes of the free molecule, evaluated by ab initio methods. The absence of the N–H stretching mode in the HREEL spectra indicates that the H atom bonded to nitrogen in the gas-phase molecule is lost upon adsorption, suggesting that MBO molecule adsorbs on the Cu surface as a thiolate. (literal)

Prodotto di

• Institute of structure of matter (ISM) (Istituto)

Autore CNR

• GIORGIO CONTINI (Unità di personale interno)

Incoming links:

Autore CNR di

• GIORGIO CONTINI (Unità di personale interno)

Prodotto

• Institute of structure of matter (ISM) (Istituto)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#rivistaDi

• Surface science (Rivista)