Determination of lateral interactions between NO molecules on Rh(111)

J.H.A. Hagelaar, C.F.J. Flipse, A.P.J. Jansen

Onderzoeksoutput: Hoofdstuk in Boek/Rapport/CongresprocedureConferentiebijdrageAcademicpeer review

2 Citaten (Scopus)

Samenvatting

. In this study, the STM was used to locally study the adsorption of NO on a Rh(111) single crystal. Three new structures were identified. At 200 K, patches of the (4 × 2)-2NO and an unreported (2 × 2)-2NO structure were found at about 0.50ML coverage. Higher exposure gave rise to a (2 × 2)-3NO structure with all molecules adsorbed in the hcp sites. At 5K, a (4 × 4)-1NO structure was observed. The large separation between the molecules can only arise from repulsive interactions over a distance of at least four times the lattice constant (11 Å). Here the interaction is estimated to be of the order of ~10K or ~0.1 kJ/mol. Dynamic Monte Carlo simulations taking into account adsorption, diffusion and pairwise interactions between adsorbates were used to fit the lateral interaction for the next-next nearest neighbor to the patched STM topograph at 200K for 0.50ML coverage. The value was determined to be 2 kJ/mol. Using pairwise interactions only, the (2 × 2)-3NO structure could not be explained. It might therefore be necessary to include three-particle interactions. Recent DFT calculations support this idea by showing attractive three-particle interactions.
Originele taal-2Engels
TitelProceedings of the International Conference on Nanoscience and Technology (ICN&T 2006), 30 July - 4 August 2006, Basel, Switzerland
RedacteurenE. Meijer, M. Hegner, H.-J. Güntherodt
Plaats van productieBristol
UitgeverijInstitute of Physics
Pagina's379-383
DOI's
StatusGepubliceerd - 2007

Publicatie series

NaamJournal of Physics: Conference Series
Volume61
ISSN van geprinte versie1742-6588

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  • Citeer dit

    Hagelaar, J. H. A., Flipse, C. F. J., & Jansen, A. P. J. (2007). Determination of lateral interactions between NO molecules on Rh(111). In E. Meijer, M. Hegner, & H-J. Güntherodt (editors), Proceedings of the International Conference on Nanoscience and Technology (ICN&T 2006), 30 July - 4 August 2006, Basel, Switzerland (blz. 379-383). (Journal of Physics: Conference Series; Vol. 61). Institute of Physics. https://doi.org/10.1088/1742-6596/61/1/076