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Correlation of breaking forces, conductances and geometries of molecular junctions

Yoshida, Koji; Pobelov, Ilya V.; Manrique, David Zsolt; Pope, Thomas; Mészáros, Gábor; Gulcur, Murat; Bryce, Martin R.; Lambert, Colin J.; Wandlowski, Thomas

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Authors

Koji Yoshida

Ilya V. Pobelov

David Zsolt Manrique

Thomas Pope

Gábor Mészáros

Murat Gulcur

Colin J. Lambert

Thomas Wandlowski



Abstract

Electrical and mechanical properties of elongated gold-molecule-gold junctions formed by tolane-type molecules with different anchoring groups (pyridyl, thiol, amine, nitrile and dihydrobenzothiophene) were studied in current-sensing force spectroscopy experiments and density functional simulations. Correlations between forces, conductances and junction geometries demonstrate that aromatic tolanes bind between electrodes as single molecules or as weakly-conductive dimers held by mechanically-weak π − π stacking. In contrast with the other anchors that form only S-Au or N-Au bonds, the pyridyl ring also forms a highly-conductive cofacial link to the gold surface. Binding of multiple molecules creates junctions with higher conductances and mechanical strengths than the single-molecule ones.

Citation

Yoshida, K., Pobelov, I. V., Manrique, D. Z., Pope, T., Mészáros, G., Gulcur, M., …Wandlowski, T. (2015). Correlation of breaking forces, conductances and geometries of molecular junctions. Scientific Reports, 5, https://doi.org/10.1038/srep09002

Journal Article Type Article
Acceptance Date Jan 29, 2015
Publication Date Mar 11, 2015
Deposit Date Mar 26, 2015
Publicly Available Date Apr 2, 2015
Journal Scientific Reports
Publisher Nature Research
Peer Reviewed Peer Reviewed
Volume 5
DOI https://doi.org/10.1038/srep09002

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http://creativecommons.org/licenses/by/4.0/

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This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder in order to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/





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