Correlation of breaking forces, conductances and geometries of molecular junctions

Koji Yoshida, Ilya V. Pobelov, David Zsolt Manrique, Thomas Pope, Gábor Mészáros, Murat Gulcur, Martin R. Bryce, Colin J. Lambert, Thomas Wandlowski

    研究成果: Article査読

    32 被引用数 (Scopus)


    Electrical and mechanical properties of elongated gold-molecule-gold junctions formed by tolane-type molecules with different anchoring groups (pyridyl, thiol, amine, nitrile and dihydrobenzothiophene) were studied in current-sensing force spectroscopy experiments and density functional simulations. Correlations between forces, conductances and junction geometries demonstrate that aromatic tolanes bind between electrodes as single molecules or as weakly-conductive dimers held by mechanically-weak π - π stacking. In contrast with the other anchors that form only S-Au or N-Au bonds, the pyridyl ring also forms a highly-conductive cofacial link to the gold surface. Binding of multiple molecules creates junctions with higher conductances and mechanical strengths than the single-molecule ones.

    ジャーナルScientific reports
    出版ステータスPublished - 2015 3 11

    ASJC Scopus subject areas

    • General

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