Reproducible measurement of single-molecule conductivity

X. D. Cui, A. Primak, X. Zarate, J. Tomfohr, O. F. Sankey, A. L. Moore, T. A. Moore, D. Gust, Gari Harris, S. M. Lindsay

    Research output: Contribution to journalArticlepeer-review

    1224 Citations (Scopus)


    A reliable method has been developed for making through-bond electrical contacts to molecules. Current-voltage curves are quantized as integer multiples of one fundamental curve, an observation used to identify single-molecule contacts. The resistance of a single octanedithiol molecule was 900 ± 50 megohms, based on measurements on more than 1000 single molecules. In contrast, nonbonded contacts to octanethiol monolayers were at least four orders of magnitude more resistive, less reproducible, and had a different voltage dependence, demonstrating that the measurement of intrinsic molecular properties requires chemically bonded contacts.
    Original languageEnglish
    Pages (from-to)571-574
    Number of pages4
    Issue number5542
    Publication statusPublished - 2001


    • Electrical conductivity
    • Single-molecule conductivity
    • Electrical contacts
    • Current voltage characteristics
    • Chemical bonds


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