Abstract
Durability of atom-sized junctions in a liquid environment was investigated and compared with that in a vacuum. The single atom junction lifetime was measured in an organic solvent under various stretching speed vd ranging from 10 to 0.001 nm/s. We found the natural lifetime of about 1 s for Au single-atom chains formed in a non-polar organic solvent at vd ≤ 0.01 nm/s, which was an order of magnitude shorter than that in a vacuum. The decreased junction lifetime indicates contact instability induced by thermal collisions of solvent molecules that exert pressure on the nanocontacts.
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