An extended chiral surface coordination network based on Ag-7-clusters

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DOI

  • Katrine L. Svane
  • Mahdi S. Baviloliaei, Aalborg Univ, Aalborg University, Dept Mat & Prod
  • ,
  • Bjork Hammer
  • Lars Diekhoner, Aalborg Univ, Aalborg University, Dept Mat & Prod

We present an extended metal-coordinated structure obtained by deposition of trimesic acid (TMA) onto the Ag(111) surface under ultra-high vacuum conditions followed by annealing to 510 K. Scanning tunneling microscopy and density functional theory calculations reveal the structure to consist of metal clusters containing seven Ag atoms each, coordinated by six dehydrogenated TMA molecules. The molecules are asymmetrically arranged, resulting in a chiral structure. The calculations confirm that this structure has a lower free energy under the experimental conditions than the hydrogen-bonded structures observed after annealing at lower temperatures. We show that the formation of such large metal clusters is possible due to the low adatom formation energy on silver and the relatively strong Ag-O bond in combination with a good lattice match between the structure and the Ag surface. Published by AIP Publishing.

Original languageEnglish
Article number164710
JournalJournal of Chemical Physics
Volume149
Issue16
Number of pages10
ISSN0021-9606
DOIs
Publication statusPublished - 28 Oct 2018

    Research areas

  • SCANNING-TUNNELING-MICROSCOPY, DENSITY-FUNCTIONAL THEORY, TRIMESIC ACID, SUPRAMOLECULAR ASSEMBLIES, CU(100) SURFACE, HYBRID CHAINS, METAL, ARRAYS, AG(111), DEHYDROGENATION

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