Chemistry and temperature-assisted dehydrogenation of C60H 30 molecules on TiO2(110) surfaces (Articolo in rivista)

Type
Label
  • Chemistry and temperature-assisted dehydrogenation of C60H 30 molecules on TiO2(110) surfaces (Articolo in rivista) (literal)
Anno
  • 2013-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1039/c3nr03706a (literal)
Alternative label
  • Sánchez-Sánchez, C. and Martínez, J.I. and Lanzilotto, V. and Biddau, G. and Gómez-Lor, B. and Pérez, R. and Floreano, L. and López, M.F. and Martín-Gago, J.A. (2013)
    Chemistry and temperature-assisted dehydrogenation of C60H 30 molecules on TiO2(110) surfaces
    in Nanoscale (Print)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Sánchez-Sánchez, C. and Martínez, J.I. and Lanzilotto, V. and Biddau, G. and Gómez-Lor, B. and Pérez, R. and Floreano, L. and López, M.F. and Martín-Gago, J.A. (literal)
Pagina inizio
  • 11058 (literal)
Pagina fine
  • 11065 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url
  • http://www.scopus.com/inward/record.url?eid=2-s2.0-84886694032&partnerID=40&md5=8b04352e08a1ea702136fdf2263ea4f2 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 5 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali
  • 8 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo
  • 22 (literal)
Note
  • ISI Web of Science (WOS) (literal)
  • Scopu (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Instituto de Ciencia de Materiales de Madrid (CSIC), Sor Juana Ines de la Cruz 3, 28049 Madrid, Spain; EMPA, Swiss Federal Laboratories for Materials Science and Technology, Überlandstrasse 129, 8600 Dübendorf, Switzerland; CNR-IOM, Laboratorio TASC, Basovizza SS-14, Km 163.5, I-34149 Trieste, Italy; Department of Physics, University of Trieste, Via A. Valerio, 2 - 34127 Trieste, Italy; Departamento de Física Teórica de la Materia Condensada, Universidad Autónoma de Madrid, 28049 Madrid, Spain; Physics Department, Humboldt-Universität zu Berlin, Zum Grossen Windkanal 6, D-12489 Berlin, Germany; Condensed Matter Physics Center (IFIMAC), Universidad Autonoma de Madrid, E-28049 Madrid, Spain; Centro de Astrobiología INTA-CSIC, Torrejón de Ardoz, 28850 Madrid, Spain (literal)
Titolo
  • Chemistry and temperature-assisted dehydrogenation of C60H 30 molecules on TiO2(110) surfaces (literal)
Abstract
  • The thermal induced on-surface chemistry of large polycyclic aromatic hydrocarbons (PAHs) deposited on dielectric substrates is very rich and complex. We evidence temperature-assisted (cyclo)dehydrogenation reactions for C 60H30 molecules and the subsequent bottom-up formation of assembled nanostructures, such as nanodomes, on the TiO2(110) surface. To this aim we have deposited, under ultra-high vacuum, a submonolayer coverage of C60H30 and studied, by a combination of experimental techniques (STM, XPS and NEXAFS) and theoretical methods, the different chemical on-surface interaction stages induced by the increasing temperature. We show that room temperature adsorbed molecules exhibit a weak interaction and freely diffuse on the surface, as previously reported for other aromatics. Nevertheless, a slight annealing induces a transition from this (meta)stable configuration into chemisorbed molecules. This adsorbate-surface interaction deforms the C60H30 molecular structure and quenches surface diffusion. Higher annealing temperatures lead to partial dehydrogenation, in which the molecule loses some of the hydrogen atoms and LUMO levels spread in the gap inducing a net total energy gain. Further annealing, up to around 750 K, leads to complete dehydrogenation. At these temperatures the fully dehydrogenated molecules link between them in a bottom-up coupling, forming nanodomes or fullerene-like monodisperse species readily on the dielectric surface. This work opens the door to the use of on-surface chemistry to generate new bottom-up tailored structures directly on high-K dielectric surfaces. © 2013 The Royal Society of Chemistry. (literal)
Prodotto di
Autore CNR

Incoming links:


Autore CNR di
Prodotto
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#rivistaDi
data.CNR.it