Going beyond Pentacene: Photoemission Tomography of a Heptacene Monolayer on Ag(110).

Autor:	Sättele MS; Institute of Physical and Theoretical Chemistry, University of Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, Germany.; Institute of Organic Chemistry, University of Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, Germany., Windischbacher A; Institute of Physics, University of Graz, NAWI Graz, Universitätsplatz 5, 8010 Graz, Austria., Egger L; Institute of Physics, University of Graz, NAWI Graz, Universitätsplatz 5, 8010 Graz, Austria., Haags A; Peter Grünberg Institut (PGI-3), Forschungszentrum Jülich, 52425 Jülich, Germany.; Jülich Aachen Research Alliance (JARA), Fundamentals of Future Information Technology, 52425 Jülich, Germany.; Experimental Physics IV A, RWTH Aachen University, 52074 Aachen, Germany., Hurdax P; Institute of Physics, University of Graz, NAWI Graz, Universitätsplatz 5, 8010 Graz, Austria., Kirschner H; Physikalisch-Technische Bundesanstalt, Abbestr. 2-12, 10587 Berlin, Germany., Gottwald A; Physikalisch-Technische Bundesanstalt, Abbestr. 2-12, 10587 Berlin, Germany., Richter M; Physikalisch-Technische Bundesanstalt, Abbestr. 2-12, 10587 Berlin, Germany., Bocquet FC; Peter Grünberg Institut (PGI-3), Forschungszentrum Jülich, 52425 Jülich, Germany.; Jülich Aachen Research Alliance (JARA), Fundamentals of Future Information Technology, 52425 Jülich, Germany., Soubatch S; Peter Grünberg Institut (PGI-3), Forschungszentrum Jülich, 52425 Jülich, Germany.; Jülich Aachen Research Alliance (JARA), Fundamentals of Future Information Technology, 52425 Jülich, Germany., Tautz FS; Peter Grünberg Institut (PGI-3), Forschungszentrum Jülich, 52425 Jülich, Germany.; Jülich Aachen Research Alliance (JARA), Fundamentals of Future Information Technology, 52425 Jülich, Germany.; Experimental Physics IV A, RWTH Aachen University, 52074 Aachen, Germany., Bettinger HF; Institute of Organic Chemistry, University of Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, Germany., Peisert H; Institute of Physical and Theoretical Chemistry, University of Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, Germany., Chassé T; Institute of Physical and Theoretical Chemistry, University of Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, Germany., Ramsey MG; Institute of Physics, University of Graz, NAWI Graz, Universitätsplatz 5, 8010 Graz, Austria., Puschnig P; Institute of Physics, University of Graz, NAWI Graz, Universitätsplatz 5, 8010 Graz, Austria., Koller G; Institute of Physics, University of Graz, NAWI Graz, Universitätsplatz 5, 8010 Graz, Austria.
Jazyk:	angličtina
Zdroj:	The journal of physical chemistry. C, Nanomaterials and interfaces [J Phys Chem C Nanomater Interfaces] 2021 Feb 11; Vol. 125 (5), pp. 2918-2925. Date of Electronic Publication: 2021 Feb 03.
DOI:	10.1021/acs.jpcc.0c09062
Abstrakt:	Longer acenes such as heptacene are promising candidates for optoelectronic applications but are unstable in their bulk structure as they tend to dimerize. This makes the growth of well-defined monolayers and films problematic. In this article, we report the successful preparation of a highly oriented monolayer of heptacene on Ag(110) by thermal cycloreversion of diheptacenes. In a combined effort of angle-resolved photoemission spectroscopy and density functional theory (DFT) calculations, we characterize the electronic and structural properties of the molecule on the surface in detail. Our investigations allow us to unambiguously confirm the successful fabrication of a highly oriented complete monolayer of heptacene and to describe its electronic structure. By comparing experimental momentum maps of photoemission from frontier orbitals of heptacene and pentacene, we shed light on differences between these two acenes regarding their molecular orientation and energy-level alignment on the metal surfaces. Competing Interests: The authors declare no competing financial interest. (© 2021 The Authors. Published by American Chemical Society.)
Databáze:	MEDLINE
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