Journal
JOURNAL OF CHEMICAL PHYSICS
Volume 144, Issue 2, Pages -Publisher
AIP Publishing
DOI: 10.1063/1.4938259
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Funding
- Leibniz Supercomputing Center in Garching [pr85za]
- Ecole Polytechnique Federale de Lausanne (EPFL)
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We employ dispersion-corrected density-functional theory to study the adsorption of tetrapyrrole 2H-porphine (2H-P) at Cu(111) and Ag(111). Various contributions to adsorbate-substrate and adsorbate-adsorbate interactions are systematically extracted to analyze the self-assembly behavior of this basic building block to porphyrin-based metal-organic nanostructures. This analysis reveals a surprising importance of substrate-mediated van der Waals interactions between 2H-P molecules, in contrast to negligible direct dispersive interactions. The resulting net repulsive interactions rationalize the experimentally observed tendency for single molecule adsorption. (C) 2016 AIP Publishing LLC.
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