Long-range repulsive interaction between molecules on a metal surface induced by charge transfer

I. Fernandez-Torrente, S. Monturet, K. J. Franke, J. Fraxedas, N. Lorente, J. I. Pascual

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    Abstract

    The adsorption of a molecular electron donor on Au(111) is characterized by the spontaneous formation of a superlattice of monomers spaced several nanometers apart. The coverage-dependent molecular pair distributions obtained from scanning tunneling microscopy data reveal an intermolecular long-range repulsive potential, which decreases as the inverse of the molecular separation. Density functional theory calculations show a charge accumulation in the molecules due to electron donation into the metal. Our results suggest that electrostatic repulsion between molecules persists on the surface of a metal. © 2007 The American Physical Society.
    Original languageEnglish
    Article number176103
    JournalPhysical Review Letters
    Volume99
    Issue number17
    DOIs
    Publication statusPublished - 25 Oct 2007

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