Stabilizing single atom contacts by molecular bridge formation

Details Stabilizing single atom contacts by molecular bridge formation Stabilizing single atom contacts by molecular bridge formation

2008-10-09

arxiv.org/abs/0810.1611v1

Nano Lett.; 2008; 8(10); 3381-3385

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

14 pages, 3 figures, 1 table

Scientific paper

10.1021/nl801983z

Gold-molecule-gold junctions can be formed by carefully breaking a gold wire in a solution containing dithiolated molecules. Surprisingly, there is little understanding on the mechanical details of the bridge formation process and specifically on the role that the dithiol molecules play themselves. We propose that alkanedithiol molecules have already formed bridges between the gold electrodes before the atomic gold-gold junction is broken. This leads to stabilization of the single atomic gold junction, as observed experimentally. Our data can be understood within a simple spring model.

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