Transition Voltage Spectroscopy of Porphyrin Molecular Wires

Neil Bennett, Gengzhao Xu, Louisa Esdaile, Harry Anderson, J Macdonald, Martin Elliott

    Research output: Contribution to journalArticlepeer-review

    35 Citations (Scopus)


    I-V characteristics of isolated porphyrin molecules display a minimum in I/V2 at a characteristic "transition voltage" V m. Fluctuations at the molecular contact effect changes in V m and from repeated measurements both its time development and statistical behavior is determined. This contrasts with the more stable contact over a self-assembled monolayer with parallel conduction through many molecules.

    Original languageEnglish
    Pages (from-to)2604-2611
    Number of pages8
    Issue number22
    Publication statusPublished - 22 Nov 2010


    • contact asymmetry
    • porphyrins
    • scanning tunneling microscopytransition voltage spectroscopy
    • single molecules


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