Hydrogen-assisted stabilization of Ni nanowires in solution

Kiguchi, Manabu; Konishi, Tatsuya; Murakoshi, Kei
July 2005
Applied Physics Letters;7/25/2005, Vol. 87 Issue 4, p043104
Academic Journal
We have studied conductance characteristics of mechanically fabricated Ni nanoconstrictions under controlling electrochemical potential and pH of the electrolyte. The conductance histogram showed a clear feature peaked at 1–1.5 G0 (G0=2e2/h) when the potential of the constriction was kept at more negative potential than -900 mV versus Ag/AgCl at pH=3.7. A comparable feature also appeared at a more positive potential when a lower pH solution was used. We have revealed that Ni monoatomic contact or monoatomic wire can be stabilized in solution at room temperature under the hydrogen evolution.


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