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Influence of Dispersion Interactions on the Thermal Desorption of Nonplanar Polycyclic Aromatic Hydrocarbons on HOPG

Weippert, Jürgen 1; Huber, Philipp 1; Schulz, Ayla 1; Amsharov, Konstantin Y.; Böttcher, Artur 1; Kappes, Manfred M. 1,2
1 Institut für Physikalische Chemie (IPC), Karlsruher Institut für Technologie (KIT)
2 Institut für Nanotechnologie (INT), Karlsruher Institut für Technologie (KIT)


A combination of low energy ion beam deposition and mass resolved thermal desorption spectroscopy is applied to analyze the binding behavior of two nonplanar polycyclic aromatic hydrocarbons (PAHs) to highly oriented pyrolytic graphite (HOPG) surfaces—also concerning their lateral dispersion interactions. In particular, the fullerene precursor C60H30 (FPC) and rubrene C42H28 are studied. Due to their smaller contact areas, both molecules exhibit significantly weaker binding energies to the HOPG surface compared to planar PAHs of similar size: C60H30 is bound to the surface by 3.04 eV, which is 0.6 eV lower than for a fully planar homologue. For rubrene, an isolated molecule–substrate binding energy of 1.59 eV is found, which is about 1 eV less than that of the corresponding planar homologue hexabenzocoronene C42H18. In contrast to FPC, rubrene shows a significant (intermolecular) lateral dispersion contribution to the binding energy as the submonolayer coverage increases.

Verlagsausgabe §
DOI: 10.5445/IR/1000099251
Veröffentlicht am 24.10.2019
DOI: 10.1002/pssr.201900348
Zitationen: 3
Zitationen: 4
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Nanotechnologie (INT)
Institut für Physikalische Chemie (IPC)
Publikationstyp Zeitschriftenaufsatz
Publikationsmonat/-jahr 11.2019
Sprache Englisch
Identifikator ISSN: 1862-6254, 1862-6270
KITopen-ID: 1000099251
HGF-Programm 43.21.03 (POF III, LK 01) Carbon Nanosystems
Erschienen in Physica status solidi / Rapid research letters
Verlag John Wiley and Sons
Band 13
Heft 11
Seiten Art.Nr. 1900348
Vorab online veröffentlicht am 10.08.2019
Nachgewiesen in Scopus
Web of Science
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