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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
chemistry
Growth of pentacene on Ag(1 1 1) surface: A NEXAFS study
Applied Surface Science, Volume 254, No. 1 SPEC. ISS., Year 2007
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Description
Thin films of pentacene (C 22 H 14 ) have become widely used in the field of organic electronics. Here films of C 22 H 14 of thickness ranging from submonolayer to multilayer were thermally deposited on Ag(1 1 1) surface. The determination of molecular geometry in pentacene films on Ag(1 1 1) studied by X-ray absorption at different stages of growth up to one monolayer is presented. XAS spectra at the C K-edge were collected as a function of the direction of the electric field at the surface. The different features of the spectra were assigned to resonances related to the various molecular unoccupied states by the comparison with the absorption coefficient of the pentacene gas phase. The transitions involving antibonding π states show a pronounced angular dependence for all the measured coverages, from submonolayer to multilayer. The spectra analysis indicates a nearly planar chemisorption of the first pentacene layer with a tilt angle of 10°. © 2007 Elsevier B.V. All rights reserved.
Authors & Co-Authors
Pedio, Maddalena
Italy, Trieste
Laboratorio Nazionale Tasc
Doyle, Bryan P.
Italy, Trieste
Laboratorio Nazionale Tasc
Giglia, Angelo G.
Italy, Trieste
Laboratorio Nazionale Tasc
Borgatti, Francesco
Italy, Trieste
Laboratorio Nazionale Tasc
Nannarone, Stefano
Italy, Trieste
Laboratorio Nazionale Tasc
Italy, Modena
Università Degli Studi Di Modena e Reggio Emilia
Casalis, Loredana
Italy, Basovizza
Elettra-sincrotrone Trieste S.c.p.a.
Nickel, B. A.
Germany, Munich
Ludwig-maximilians-universität München
Statistics
Citations: 28
Authors: 7
Affiliations: 6
Identifiers
Doi:
10.1016/j.apsusc.2007.07.125
ISSN:
01694332