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Adverse effects of asymmetric contacts on single molecule conductances of HS(CH2)(n) COOH in nanoelectrical junctions

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Adverse effects of asymmetric contacts on single molecule conductances of HS(CH2)(n) COOH in nanoelectrical junctions. / Martin, Santiago; Manrique, David; Garcia-Suarez, Victor M. et al.
In: Nanotechnology, Vol. 20, No. 12, 125203, 25.03.2009, p. -.

Research output: Contribution to Journal/MagazineJournal articlepeer-review

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Martin S, Manrique D, Garcia-Suarez VM, Haiss W, Higgins SJ, Lambert CJ et al. Adverse effects of asymmetric contacts on single molecule conductances of HS(CH2)(n) COOH in nanoelectrical junctions. Nanotechnology. 2009 Mar 25;20(12):-. 125203. doi: 10.1088/0957-4484/20/12/125203

Author

Martin, Santiago ; Manrique, David ; Garcia-Suarez, Victor M. et al. / Adverse effects of asymmetric contacts on single molecule conductances of HS(CH2)(n) COOH in nanoelectrical junctions. In: Nanotechnology. 2009 ; Vol. 20, No. 12. pp. -.

Bibtex

@article{2e1bca3f81cd43e7b23602ca85e0105e,
title = "Adverse effects of asymmetric contacts on single molecule conductances of HS(CH2)(n) COOH in nanoelectrical junctions",
abstract = "A scanning tunnelling microscope has been used to determine the conductance of single molecular wires with the configuration X-bridge - X, X-bridge-Y and Y-bridge-Y (X = thiol terminus and Y = COOH). We find that for molecular wires with mixed functional groups (X - bridge - Y) the single molecule conductance decreases with respect to the comparable symmetric molecules. These differences are confirmed by theoretical computations based on a combination of density functional theory and the non-equilibrium Green's functions formalism. This study demonstrates that the apparent contact resistance, as well as being highly sensitive to the type of the anchoring group, is also strongly influenced by contact-asymmetry of the single molecular junction which in this case decreases the transmission. This highlights that contact-asymmetry is a significant factor to be considered when evaluating nanoelectrical junctions incorporating single molecules.",
author = "Santiago Martin and David Manrique and Garcia-Suarez, {Victor M.} and Wolfgang Haiss and Higgins, {Simon J.} and Lambert, {Colin J.} and Nichols, {Richard J.}",
year = "2009",
month = mar,
day = "25",
doi = "10.1088/0957-4484/20/12/125203",
language = "English",
volume = "20",
pages = "--",
journal = "Nanotechnology",
issn = "0957-4484",
publisher = "IOP Publishing Ltd.",
number = "12",

}

RIS

TY - JOUR

T1 - Adverse effects of asymmetric contacts on single molecule conductances of HS(CH2)(n) COOH in nanoelectrical junctions

AU - Martin, Santiago

AU - Manrique, David

AU - Garcia-Suarez, Victor M.

AU - Haiss, Wolfgang

AU - Higgins, Simon J.

AU - Lambert, Colin J.

AU - Nichols, Richard J.

PY - 2009/3/25

Y1 - 2009/3/25

N2 - A scanning tunnelling microscope has been used to determine the conductance of single molecular wires with the configuration X-bridge - X, X-bridge-Y and Y-bridge-Y (X = thiol terminus and Y = COOH). We find that for molecular wires with mixed functional groups (X - bridge - Y) the single molecule conductance decreases with respect to the comparable symmetric molecules. These differences are confirmed by theoretical computations based on a combination of density functional theory and the non-equilibrium Green's functions formalism. This study demonstrates that the apparent contact resistance, as well as being highly sensitive to the type of the anchoring group, is also strongly influenced by contact-asymmetry of the single molecular junction which in this case decreases the transmission. This highlights that contact-asymmetry is a significant factor to be considered when evaluating nanoelectrical junctions incorporating single molecules.

AB - A scanning tunnelling microscope has been used to determine the conductance of single molecular wires with the configuration X-bridge - X, X-bridge-Y and Y-bridge-Y (X = thiol terminus and Y = COOH). We find that for molecular wires with mixed functional groups (X - bridge - Y) the single molecule conductance decreases with respect to the comparable symmetric molecules. These differences are confirmed by theoretical computations based on a combination of density functional theory and the non-equilibrium Green's functions formalism. This study demonstrates that the apparent contact resistance, as well as being highly sensitive to the type of the anchoring group, is also strongly influenced by contact-asymmetry of the single molecular junction which in this case decreases the transmission. This highlights that contact-asymmetry is a significant factor to be considered when evaluating nanoelectrical junctions incorporating single molecules.

U2 - 10.1088/0957-4484/20/12/125203

DO - 10.1088/0957-4484/20/12/125203

M3 - Journal article

VL - 20

SP - -

JO - Nanotechnology

JF - Nanotechnology

SN - 0957-4484

IS - 12

M1 - 125203

ER -