Planar Growth of Pentacene on the Dielectric TiO2(110) Surface (Articolo in rivista)

Type
Label
  • Planar Growth of Pentacene on the Dielectric TiO2(110) Surface (Articolo in rivista) (literal)
Anno
  • 2011-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1021/jp111011z (literal)
Alternative label
  • Valeria Lanzilotto,+ Carlos Sanchez-Sanchez,? Gregor Bavdek,z Dean Cvetko,§ Maria F. Lopez,? Jos?e A. Martin-Gago,? and Luca Floreano*,+ (2011)
    Planar Growth of Pentacene on the Dielectric TiO2(110) Surface
    in Journal of physical chemistry. C
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Valeria Lanzilotto,+ Carlos Sanchez-Sanchez,? Gregor Bavdek,z Dean Cvetko,§ Maria F. Lopez,? Jos?e A. Martin-Gago,? and Luca Floreano*,+ (literal)
Pagina inizio
  • 4664 (literal)
Pagina fine
  • 4672 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 115 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • +Instituto de Ciencia de Materiales de Madrid (CSIC), C/Sor Juana Ines de la Cruz 3, E-28049 Madrid, Spain ?CNR-IOM, Laboratorio TASC, Basovizza SS-14, Km 163.5, I-34149 Trieste, Italy zFaculty of Education and §Department of Physics, University of Ljubljana, Ljubljana, Slovenia (literal)
Titolo
  • Planar Growth of Pentacene on the Dielectric TiO2(110) Surface (literal)
Abstract
  • We have studied the growth of pentacene molecules on the unreconstructed and stoichiometric surface of TiO2(110). At variance with its characteristic homeotropic growth mode, pentacene is found to be physisorbed on this dielectric substrate with its long molecular axis oriented parallel to the surface and aligned along the [001] direction. Pentacene molecules couple side-by-side into long stripes running along the [110] direction, where the overlayer preserves the substrate lattice periodicity (_6.5 A?). In the opposite direction, head-to-head pentacene repulsion drives the ordering of the stripes, whose spacing simply depends on the surface coverage. By near-edge X-ray absorption, NEXAFS, we have determined the pentacene molecules to be tilted by _25? o_ the surface around their long axis. At the monolayer coverage, the pentacene orientation and spacing are very close to that of the (010) bulk planes (also called a-c planes) of pentacene crystals. We have observed that at least two additional layers can be grown on top of the monolayer following a planar con_guration. Both the strong side-by-side intermolecular attraction and the full development of the bulklike electronic states, as probed by NEXAFS, suggest an optimal charge transport along the monolayer stripes of lying-down molecules. (literal)
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