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Side-Group-Mediated Mechanical Conductance Switching in Molecular Junctions

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Side-Group-Mediated Mechanical Conductance Switching in Molecular Junctions. / Ismael, Ali Khalid; Wang, Kun; Vezzoli, Andrea; Al-Khaykanee, Mohsin K.; Gallagher, Harry E.; Grace, Iain M.; Lambert, Colin J.; Xu, Bingqian; Nichols, Richard J.; Higgins, Simon J.

In: Angewandte Chemie International Edition, Vol. 56, No. 48, 27.11.2017, p. 15378-15382.

Research output: Contribution to journalJournal article

Harvard

Ismael, AK, Wang, K, Vezzoli, A, Al-Khaykanee, MK, Gallagher, HE, Grace, IM, Lambert, CJ, Xu, B, Nichols, RJ & Higgins, SJ 2017, 'Side-Group-Mediated Mechanical Conductance Switching in Molecular Junctions', Angewandte Chemie International Edition, vol. 56, no. 48, pp. 15378-15382. https://doi.org/10.1002/anie.201709419

APA

Ismael, A. K., Wang, K., Vezzoli, A., Al-Khaykanee, M. K., Gallagher, H. E., Grace, I. M., Lambert, C. J., Xu, B., Nichols, R. J., & Higgins, S. J. (2017). Side-Group-Mediated Mechanical Conductance Switching in Molecular Junctions. Angewandte Chemie International Edition, 56(48), 15378-15382. https://doi.org/10.1002/anie.201709419

Vancouver

Ismael AK, Wang K, Vezzoli A, Al-Khaykanee MK, Gallagher HE, Grace IM et al. Side-Group-Mediated Mechanical Conductance Switching in Molecular Junctions. Angewandte Chemie International Edition. 2017 Nov 27;56(48):15378-15382. https://doi.org/10.1002/anie.201709419

Author

Ismael, Ali Khalid ; Wang, Kun ; Vezzoli, Andrea ; Al-Khaykanee, Mohsin K. ; Gallagher, Harry E. ; Grace, Iain M. ; Lambert, Colin J. ; Xu, Bingqian ; Nichols, Richard J. ; Higgins, Simon J. / Side-Group-Mediated Mechanical Conductance Switching in Molecular Junctions. In: Angewandte Chemie International Edition. 2017 ; Vol. 56, No. 48. pp. 15378-15382.

Bibtex

@article{ebd9839ebcb9410e91bace5569356723,
title = "Side-Group-Mediated Mechanical Conductance Switching in Molecular Junctions",
abstract = "A key target in molecular electronics has been molecules having switchable electrical properties. Switching between two electrical states has been demonstrated using such stimuli as light, electrochemical voltage, complexation and mechanical modulation. A classic example of the latter is the switching of 4,4-bipyridine, leading to conductance modulation of around 1 order of magnitude. Here, we describe the use of side-group chemistry to control the properties of a single-molecule electromechanical switch, which can be cycled between two conductance states by repeated compression and elongation. While bulky alkyl substituents inhibit the switching behavior, -conjugated side-groups reinstate it. DFT calculations show that weak interactions between aryl moieties and the metallic electrodes are responsible for the observed phenomenon. This represents a significant expansion of the single-molecule electronics tool-box for the design of junctions with electromechanical properties.",
keywords = "density functional calculations, electron transport, molecular electronics, nanotechnology, scanning probe microscopy, ENERGY-LEVEL ALIGNMENT, BREAK JUNCTION, SINGLE, CONDUCTIVITY, DEPENDENCE",
author = "Ismael, {Ali Khalid} and Kun Wang and Andrea Vezzoli and Al-Khaykanee, {Mohsin K.} and Gallagher, {Harry E.} and Grace, {Iain M.} and Lambert, {Colin J.} and Bingqian Xu and Nichols, {Richard J.} and Higgins, {Simon J.}",
year = "2017",
month = nov
day = "27",
doi = "10.1002/anie.201709419",
language = "English",
volume = "56",
pages = "15378--15382",
journal = "Angewandte Chemie International Edition",
issn = "1433-7851",
publisher = "Wiley-VCH Verlag",
number = "48",

}

RIS

TY - JOUR

T1 - Side-Group-Mediated Mechanical Conductance Switching in Molecular Junctions

AU - Ismael, Ali Khalid

AU - Wang, Kun

AU - Vezzoli, Andrea

AU - Al-Khaykanee, Mohsin K.

AU - Gallagher, Harry E.

AU - Grace, Iain M.

AU - Lambert, Colin J.

AU - Xu, Bingqian

AU - Nichols, Richard J.

AU - Higgins, Simon J.

PY - 2017/11/27

Y1 - 2017/11/27

N2 - A key target in molecular electronics has been molecules having switchable electrical properties. Switching between two electrical states has been demonstrated using such stimuli as light, electrochemical voltage, complexation and mechanical modulation. A classic example of the latter is the switching of 4,4-bipyridine, leading to conductance modulation of around 1 order of magnitude. Here, we describe the use of side-group chemistry to control the properties of a single-molecule electromechanical switch, which can be cycled between two conductance states by repeated compression and elongation. While bulky alkyl substituents inhibit the switching behavior, -conjugated side-groups reinstate it. DFT calculations show that weak interactions between aryl moieties and the metallic electrodes are responsible for the observed phenomenon. This represents a significant expansion of the single-molecule electronics tool-box for the design of junctions with electromechanical properties.

AB - A key target in molecular electronics has been molecules having switchable electrical properties. Switching between two electrical states has been demonstrated using such stimuli as light, electrochemical voltage, complexation and mechanical modulation. A classic example of the latter is the switching of 4,4-bipyridine, leading to conductance modulation of around 1 order of magnitude. Here, we describe the use of side-group chemistry to control the properties of a single-molecule electromechanical switch, which can be cycled between two conductance states by repeated compression and elongation. While bulky alkyl substituents inhibit the switching behavior, -conjugated side-groups reinstate it. DFT calculations show that weak interactions between aryl moieties and the metallic electrodes are responsible for the observed phenomenon. This represents a significant expansion of the single-molecule electronics tool-box for the design of junctions with electromechanical properties.

KW - density functional calculations

KW - electron transport

KW - molecular electronics

KW - nanotechnology

KW - scanning probe microscopy

KW - ENERGY-LEVEL ALIGNMENT

KW - BREAK JUNCTION

KW - SINGLE

KW - CONDUCTIVITY

KW - DEPENDENCE

U2 - 10.1002/anie.201709419

DO - 10.1002/anie.201709419

M3 - Journal article

VL - 56

SP - 15378

EP - 15382

JO - Angewandte Chemie International Edition

JF - Angewandte Chemie International Edition

SN - 1433-7851

IS - 48

ER -