Fabrication of sustainable Au mono-atomic wire showing conductance quantization in solution

概要

論文の詳細を見る
Electric conductance of the Au nano constrictions was investigated in 0.1M Na2SO4 solution under electrochemical potential control. Point contact of Au showing the unit of the quantum conductance, G0 (2e^2/h), can be stretched as long as 1 nm when the electrochemical potential of the contact was kept at 0.5 V vs. Ag/AgCl. The result proves superior stability of Au mono atomic wire fabricated in solution. As the electrochemical potential changed to negative, the stretch length of the mono atomic wire decreased. The change of the stability was recovered as the potential became positive, indicating that the stability of the wire can be fully controlled by the electrochemical potential. In the time cause of the conductance trace, fluctuation was observed. The change in the value in the conductance was less than -15%. This fluctuation was attributed to the change in the number of atoms in the mono atomic wire. Observed changes in the conductance reflect the characteristics of the dynamical formation/deformation processes of the mono atomic wire showing conductance quantization in solution at room temperature.
Materials Research Society of Japan (日本ＭＲＳ)の論文