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STM study of the electronic structure of PTCDA on Ag/Si(111)-√3×√3
Karlstad University, Faculty of Technology and Science, Department of Physics and Electrical Engineering. (Materialfysik)ORCID iD: 0000-0003-4165-1515
Karlstad University, Faculty of Technology and Science, Department of Physics and Electrical Engineering. (Materialfysik)
Karlstad University, Faculty of Technology and Science, Department of Physics and Electrical Engineering. (Materialfysik)
2010 (English)In: Chemical Physics Letters, ISSN 0009-2614, E-ISSN 1873-4448, Vol. 485, no 1-3, 69-76 p.Article in journal (Refereed) Published
Abstract [en]

PTCDA molecules were evaporated onto the Ag/Si(111)-√3×√3 surface. Simple HOMO and LUMO models have been made to explain the STM images of the square and herringbone phases. The charge transfer from the substrate and the H-bonding between the molecules play crucial roles for the formation of these phases. We found that their electronic structures are strongly modified by the moleculesubstrate and intermolecular interactions. As a result, the HOMO-LUMO gaps of the PTCDA films are different for different phases and thicknesses. The increase in the HOMO-LUMO gaps with film thicknesses is discussed based on the surface and the interface polarization effect

Place, publisher, year, edition, pages
Amsterdam: Elsevier, 2010. Vol. 485, no 1-3, 69-76 p.
National Category
Physical Sciences
Research subject
Physics
Identifiers
URN: urn:nbn:se:kau:diva-11586DOI: 10.1016/j.cplett.2009.11.070ISI: 000273231900015OAI: oai:DiVA.org:kau-11586DiVA: diva2:493147
Funder
Swedish Research Council
Available from: 2012-02-08 Created: 2012-02-08 Last updated: 2016-02-17Bibliographically approved

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Publisher's full texthttp://www.sciencedirect.com/science/article/pii/S0009261409015097

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