Nonadditivity of the adsorption energies of linear acenes on au(111)

• Verfasst von: Maaß, Friedrich [VerfasserIn]
• Verfasst von: Ajdari, Mohsen [VerfasserIn]
• Verfasst von: Tegeder, Petra [VerfasserIn]
• Titel: Nonadditivity of the adsorption energies of linear acenes on au(111)
• Titelzusatz: Molecular anisotropy and many-body effects
• Verf.angabe: Friedrich Maass, Mohsen Ajdari, Fairoja Cheenicode Kabeer, Maximilian Vogtland, Alexandre Tkatchenko, and Petra Tegeder
• E-Jahr: 2019
• Jahr: February 15, 2019
• Umfang: 5 S.
• Fussnoten: Gesehen am 29.04.2019
• Titel Quelle: Enthalten in: The journal of physical chemistry letters
• Ort Quelle: Washington, DC : ACS, 2010
• Jahr Quelle: 2019
• Band/Heft Quelle: 10(2019), 5, Seite 1000-1004
• ISSN Quelle: 1948-7185
• DOI: doi:10.1021/acs.jpclett.9b00265
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1663703760

Abstract

Adsorption energies of chemisorbed molecules on inorganic solids usually scale linearly with molecular size and are well described by additive scaling laws. However, much less is known about scaling laws for physisorbed molecules. Our temperature-programmed desorption experiments demonstrate that the adsorption energy of acenes (benzene to pentacene) on the Au(111) surface in the limit of low coverage is highly nonadditive with respect to the molecular size. For pentacene, the deviation from an additive scaling of the adsorption energy amounts to as much as 0.7 eV. Our first-principles calculations explain the observed nonadditive behavior in terms of anisotropy of molecular polarization stemming from many-body electronic correlations. The observed nonadditivity of the adsorption energy has implications for surface-mediated intermolecular interactions and the ensuing on-surface self-assembly. Thus, future coverage-dependent studies should aim to gain insights into the impact of these complex interactions on the self-assembly of π-conjugated organic molecules on metal surfaces.