Electronic Decay Length in a Protein Molecule

Bintian Zhang, Stuart Lindsay

Research output: Contribution to journalArticlepeer-review

22 Scopus citations


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
Issue number6
StatePublished - Jun 12 2019


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

ASJC Scopus subject areas

  • Bioengineering
  • General Chemistry
  • General Materials Science
  • Condensed Matter Physics
  • Mechanical Engineering


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