Electrochemical Single-Molecule Transistors with Optimized Gate Coupling


Osorio Calvopina, Henrry, Catarelli, Samantha, Cea, Pilar, Gluyas, Josef BG, Hartl, František, Higgins, Simon ORCID: 0000-0003-3518-9061, Leary, Edmund, Low, Paul J, Martín, Santiago, Nichols, Richard ORCID: 0000-0002-1446-8275 et al (show 5 more authors) (2015) Electrochemical Single-Molecule Transistors with Optimized Gate Coupling. Journal of the American Chemical Society, 137 (45). pp. 14319-14328.

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Abstract

Electrochemical gating at the single molecule level of viologen molecular bridges in ionic liquids is examined. Contrary to previous data recorded in aqueous electrolytes, a clear and sharp peak in the single molecule conductance versus electrochemical potential data is obtained in ionic liquids. These data are rationalized in terms of a two-step electrochemical model for charge transport across the redox bridge. In this model the gate coupling in the ionic liquid is found to be fully effective with a modeled gate coupling parameter, ξ, of unity. This compares to a much lower gate coupling parameter of 0.2 for the equivalent aqueous gating system. This study shows that ionic liquids are far more effective media for gating the conductance of single molecules than either solid-state three-terminal platforms created using nanolithography, or aqueous media.

Item Type: Article
Uncontrolled Keywords: Salts, Redox reactions, Solvents, Electrical conductivity, Electrolytes
Subjects: ?? QD ??
Depositing User: Symplectic Admin
Date Deposited: 06 Nov 2015 16:04
Last Modified: 15 Dec 2022 11:28
DOI: 10.1021/jacs.5b08431
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/2035626
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