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Silver Makes Better Electrical Contacts to Thiol-Terminated Silanes than Gold

Li, Haixing ; Su, Timothy A. ; Camarasa-Gómez, María ; Hernangómez-Pérez, Daniel ; Henn, Simon E. ; Pokorný, Vladislav ; Caniglia, Caravaggio D. ; Inkpen, Michael S. ; Korytár, Richard ; Steigerwald, Michael L. ; Nuckolls, Colin ; Evers, Ferdinand ; Venkataraman, Latha



Abstract

We report that the single-molecule junction conductance of thiol-terminated silanes with Ag electrodes are higher than the conductance of those formed with Au electrodes. These results are in contrast to the trends in the metal work function Phi(Ag)< Phi(Au). As such, a better alignment of the Au Fermi level to the molecular orbital of silane that mediates charge transport would be expected. This ...

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