Stabilizing single atom contacts by molecular bridge formation.
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.
Huisman
Everardus H
EH
Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands. e.h.huisman@rug.nl
Trouwborst
Marius L
ML
Bakker
Frank L
FL
de Boer
Bert
B
van Wees
Bart J
BJ
van der Molen
Sense J
SJ