2004 年 25 巻 2 号 p. 91-97
Sustainable metal nanocontacts were fabricated under controlled electrochemical potential in solution. Metal nanocontacts of Cu, Ag, Ni, Pd, and Pb were fabricated via electrochemical etching or deposition at a gap of sustainable thin Au wires in solution. Relatively stable behavior of the conductance quantization exhibiting a unit value was apparent at the contacts of Cu, Ag, Ni, and Pd at room temperature. Conductance quantization behavior of the Pb contact was rather unstable in comparison with other metals. Mechanical stability of Au nanocontact was also examined by controlling electrochemical potential in various solutions containing ClO4−, SO42− and Cl− ions.