Research output: Contribution to Journal/Magazine › Journal article › peer-review
Correlation of breaking forces, conductances and geometries of molecular junctions. / Yoshida, Koji; Pobelov, Ilya V.; Manrique, David Zsolt et al.
In: Scientific Reports, Vol. 5, 9002, 11.03.2015.Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Correlation of breaking forces, conductances and geometries of molecular junctions
AU - Yoshida, Koji
AU - Pobelov, Ilya V.
AU - Manrique, David Zsolt
AU - Pope, Tom
AU - Meszaros, Gabor
AU - Gulcur, Murat
AU - Bryce, Martin R.
AU - Lambert, Colin J.
AU - Wandlowski, Thomas
PY - 2015/3/11
Y1 - 2015/3/11
N2 - 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 pi - pi 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.
AB - 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 pi - pi 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.
KW - ELECTRONIC TRANSPORT
KW - CHARGE-TRANSPORT
KW - ANCHORING GROUPS
KW - SINGLE
KW - WIRES
KW - DNA
KW - ETHYNYLENE)S
KW - SPECTROSCOPY
KW - EVOLUTION
KW - BONDS
U2 - 10.1038/srep09002
DO - 10.1038/srep09002
M3 - Journal article
VL - 5
JO - Scientific Reports
JF - Scientific Reports
SN - 2045-2322
M1 - 9002
ER -