Adsorption of Large Hydrocarbons on Coinage Metals: A van der Waals Density Functional Study |
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| Authors: | Dr. Jonas Björk Prof. Sven Stafström |
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| Affiliation: | Department of Physics, Chemistry and Biology, IFM, Link?ping University, 581 83 Link?ping (Sweden) |
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| Abstract: | The adsorption of organic molecules onto the close‐packed facets of coinage metals is studied, and how accurately adsorption heights can be described by using recent advances of the van der Waals density functional (vdWDF), with optPBE/vdWDF, optB86b/vdWDF, vdWDF2, and rev/vdWDF2 functionals is illustrated. The adsorption of two prototypical aromatic hydrocarbons is investigated, and the calculated adsorption heights are compared to experimental literature values from normal incident X‐ray standing wave absorption and a state‐of‐the‐art semi‐empirical method. It is shown that both the optB86b/vdWDF and rev/vdWDF2 functionals describe adsorption heights with an accuracy of 0.1 Å, compared to experimental values, and are concluded as reliable methods of choice for related systems. |
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| Keywords: | density functional calculations metal– organic interfaces adsorption van der waals density functional van der waals interactions |
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