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Influence of Steps on the Tilting and Adsorption Dynamics of Ordered Pentacene Films on Vicinal Ag(111) Surfaces (Articolo in rivista)
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- Influence of Steps on the Tilting and Adsorption Dynamics of Ordered Pentacene Films on Vicinal Ag(111) Surfaces (Articolo in rivista) (literal)
- Anno
- 2012-01-01T00:00:00+01:00 (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
- 10.1021/jp306463w (literal)
- Alternative label
E. Mete, I. Demirog?lu, E. Albayrak, G. Bracco, S?. Ellialt?og?lu, and M. F. Dan?s?man (2012)
Influence of Steps on the Tilting and Adsorption Dynamics of Ordered Pentacene Films on Vicinal Ag(111) Surfaces
in Journal of physical chemistry. C; ACS, American chemical society, Washington, DC (Stati Uniti d'America)
(literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
- E. Mete, I. Demirog?lu, E. Albayrak, G. Bracco, S?. Ellialt?og?lu, and M. F. Dan?s?man (literal)
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- Department of Physics, Bal?kesir University, Bal?kesir 10145, Turkey
Department of Chemistry, Middle East Technical University, Ankara 06800, Turkey
Department of Physics, Sakarya University, Sakarya 54187, Turkey
CNR-IMEM and Department of Physics, University of Genoa, via Dodecaneso 33, 16146 Genoa, Italy
Department of Physics, Middle East Technical University, Ankara 06800, Turkey (literal)
- Titolo
- Influence of Steps on the Tilting and Adsorption Dynamics of Ordered Pentacene Films on Vicinal Ag(111) Surfaces (literal)
- Abstract
- Here we present a structural study of pentacene (Pn)
thin films on vicinal Ag(111) surfaces by He atom diffraction
measurements and density functional theory (DFT) calculations
supplemented with van der Waals (vdW) interactions. Our He atom
diffraction results suggest initial adsorption at the step edges evidenced
by initial slow specular reflection intensity decay rate as a function of
Pn deposition time. In parallel with the experimental findings, our DFT
+vdW calculations predict the step edges as the most stable adsorption
site on the surface. An isolated molecule adsorbs as tilted on the step edge with a binding energy of 1.4 eV. In addition, a
complete monolayer (ML) with pentacenes flat on the terraces and tilted only at the step edges is found to be more stable than
one with all lying flat or tilted molecules, which in turn influences multilayers. Hence our results suggest that step edges can trap
Pn molecules and act as nucleation sites for the growth of ordered thin films with a crystal structure similar to that of bulk Pn. (literal)
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