Year: 2025
Type: article
Abstract: The influence of changing electrode material on the electrical and mechanical properties of metal-molecule-metal junctions is relatively poorly understood, yet an improved understanding of these interfaces remains critical to the implementation of such systems as active elements in real-world circuits. Accordingly, here we study single-molecule junctions comprising thioether-linked alkane and oligophenyl wires formed under an inert atmosphere using gold, silver, and copper electrodes. Break junction experiments and computational simulations reveal that the conductance of junctions with different contacts typically decreases in the order gold > silver ≥ copper. Such trends cannot be explained solely from the differences in work function for these metals, which are modulated in junctions by the interface dipole. Transport calculations also expose the influence of electronic coupling to the electrodes, which is strongest for gold. Together, this study charts a coherent path toward a more complete understanding of the role of the electrode in single-molecule devices.
Source: Nano Letters
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $4,500
Awards: Collaborative Research: Acquisition of a 400 MHz NMR at the University of Southern California, G1761812275, G3306068231, G3634295717, G4040018596, MRI: Acquisition of a 600 Mhz NMR Spectrometer at the University of Southern California, G5366184946, G5647499306, G584487365, G6165425573, Acquisition of a 500 MHz NMR Spectrometer for the University of Southern Calif, G8227998441, G875823593
OpenAlex ID: W4410627726