Three reversible states controlled on a gold monoatomic contact by the electrochemical potential

Abstract

Conductance of an Au mono atomic contact was investigated under the electrochemical potential control. The Au contact showed three different behaviors depending on the potential: 1 $G_0$ ($G_0$ = $2e^2/h$), 0.5 $G_0$ and not-well defined values below 1 $G_0$ were shown when the potential of the contact was kept at -0.6 V (double layer potential), -1.0 V (hydrogen evolution potential), and 0.8 V (oxide formation potential) versus Ag/AgCl in 0.1 M Na${}_2$SO${}_4$ solution, respectively. These three reversible states and their respective conductances could be fully controlled by the electrochemical potential. These changes in the conductance values are discussed based on the proposed structure models of hydrogen adsorbed and oxygen incorporated on an Au mono atomic contact.

arXiv comment8 pages, 4 figures, to be appeared in Physical Review B

References in corpus (9)

• Quantum properties of atomic-sized conductors
• Formation and manipulation of a metallic wire of single gold atoms
• Measurement of the conductance of a hydrogen molecule
• Oxygen enhanced atomic chain formation
• Evidence for a single hydrogen molecule connected by an atomic chain
• Oxygen clamps in gold nanowires
• H${}_2$ dissociation over Au-nanowires and the fractional conductance quantum
• Hydrogen-assisted stabilization of Ni nanowires in solution
• Fabrication of stable Pd nanowire assisted by hydrogen in solution

Cited by in corpus (1)

• Electric Conductance of Rh Atomic Contacts under Electrochemical Potential Control