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Transistor-like Behavior of Single Metalloprotein Junctions

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journal contribution
posted on 2012-06-13, 00:00 authored by Juan M. Artés, Ismael Díez-Pérez, Pau Gorostiza
Single protein junctions consisting of azurin bridged between a gold substrate and the probe of an electrochemical tunneling microscope (ECSTM) have been obtained by two independent methods that allowed statistical analysis over a large number of measured junctions. Conductance measurements yield (7.3 ± 1.5) × 10–6G0 in agreement with reported estimates using other techniques. Redox gating of the protein with an on/off ratio of 20 was demonstrated and constitutes a proof-of-principle of a single redox protein field-effect transistor.