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