Two-dimensional supramolecular nanopatterns formed by the coadsorption of guanine and uracil at the liquid/solid interface

Wael Mamdouh, Ross E A Kelly, Mingdong Dong, Lev N Kantorovich, Flemming Besenbacher

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    Abstract

    A novel supramolecular nanostructure formed by the coadsorption of the complementary nucleobases guanine (G) and uracil (U) at the liquid (1-octanol solvent)/solid (graphite) interface is revealed by scanning tunneling microscopy (STM). The GU supramolecular structure is distinctly different from the structures observed by STM when the individual nucleobases (NB) are adsorbed on graphite in the control experiments. Using a systematic methodology and ab initio density functional theory (DFT), an atomistic structural model is proposed for the supramolecular coadsorbed GU structure, which consists of a periodic repetition of cyclic units based on the strongest GU base pairing.
    Original languageEnglish
    JournalJournal of the American Chemical Society
    Volume130
    Issue2
    Pages (from-to)695-702
    Number of pages7
    ISSN0002-7863
    DOIs
    Publication statusPublished - 2007

    Keywords

    • Adsorption
    • Graphite
    • Guanine
    • Microscopy, Scanning Tunneling
    • Nanostructures
    • Octanols
    • Uracil

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