Electronic Decay Length in a Protein Molecule

Bintian Zhang, Stuart Lindsay

    Research output: Contribution to journalArticle

    4 Scopus citations

    Abstract

    Antibodies have two identical binding domains and can therefore form a well-defined conducting bridge by binding a pair of electrodes functionalized with an epitope. The conductance measured between these two fixed points on the antibody does not change with the size of the electrode gap. A second conduction path is via one specific attachment to an epitope and a second nonspecific attachment to the surface of the antibody. In this case, the conductance does change with gap size, yielding an estimated electronic decay length >6 nm, long enough that it is not possible to distinguish between an exponential or a hyperbolic distance dependence. This decay length is substantially greater than that measured for hopping transport in an organic molecular wire.

    Original languageEnglish (US)
    Pages (from-to)4017-4022
    Number of pages6
    JournalNano Letters
    Volume19
    Issue number6
    DOIs
    StatePublished - Jun 12 2019

    Keywords

    • Molecular electronics
    • bioelectronics
    • electronic decay length
    • protein conductance

    ASJC Scopus subject areas

    • Bioengineering
    • Chemistry(all)
    • Materials Science(all)
    • Condensed Matter Physics
    • Mechanical Engineering

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