Anomalous length dependence of conductance of aromatic nanoribbons with amine anchoring groups

Handle URI:
http://hdl.handle.net/10754/597581
Title:
Anomalous length dependence of conductance of aromatic nanoribbons with amine anchoring groups
Authors:
Bilić, Ante; Sanvito, Stefano
Abstract:
Two sets of aromatic nanoribbons, based around a common hexagonal scaffolding, with single and dual terminal amine groups have been considered as potential molecular wires in a junction formed by gold leads. Charge transport through the two-terminal device has been modeled using density functional theory (with and without self-interaction correction) and the nonequilibrium Green's function method. The effects of wire length, multiple terminal contacts, and pathways across the junction have been investigated. For nanoribbons with the oligopyrene motif and conventional single amine terminal groups, an increase in the wire length causes an exponential drop in the conductance. In contrast, for the nanoribbons with the oligoperylene motif and dual amine anchoring groups the predicted conductance rises with the wire length over the whole range of investigated lengths. Only when the effects of self-interaction correction are taken into account, the conductance of the oligoperylene ribbons exhibits saturation for longer members of the series. The oligoperylene nanoribbons, with dual amine groups at both terminals, show the potential to fully harness the highly conjugated system of π molecular orbitals across the junction. © 2012 American Physical Society.
Citation:
Bilić A, Sanvito S (2012) Anomalous length dependence of conductance of aromatic nanoribbons with amine anchoring groups. Physical Review B 86. Available: http://dx.doi.org/10.1103/PhysRevB.86.125409.
Publisher:
American Physical Society (APS)
Journal:
Physical Review B
KAUST Grant Number:
FIC/2010/08
Issue Date:
6-Sep-2012
DOI:
10.1103/PhysRevB.86.125409
Type:
Article
ISSN:
1098-0121; 1550-235X
Sponsors:
This work was supported by the Flexible Electronics Theme of the CSIRO Future Manufacturing Flagship. A.B. thanks the CSIRO for support through the Julius Career Award. The use of the NCI National Facility supercomputers at the ANU is gratefully acknowledged. The SMEAGOL project is sponsored by Science Foundation of Ireland (Grant No. 07/IN/I945), by KAUST (FIC/2010/08) and by CRANN.
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Full metadata record

DC FieldValue Language
dc.contributor.authorBilić, Anteen
dc.contributor.authorSanvito, Stefanoen
dc.date.accessioned2016-02-25T12:42:28Zen
dc.date.available2016-02-25T12:42:28Zen
dc.date.issued2012-09-06en
dc.identifier.citationBilić A, Sanvito S (2012) Anomalous length dependence of conductance of aromatic nanoribbons with amine anchoring groups. Physical Review B 86. Available: http://dx.doi.org/10.1103/PhysRevB.86.125409.en
dc.identifier.issn1098-0121en
dc.identifier.issn1550-235Xen
dc.identifier.doi10.1103/PhysRevB.86.125409en
dc.identifier.urihttp://hdl.handle.net/10754/597581en
dc.description.abstractTwo sets of aromatic nanoribbons, based around a common hexagonal scaffolding, with single and dual terminal amine groups have been considered as potential molecular wires in a junction formed by gold leads. Charge transport through the two-terminal device has been modeled using density functional theory (with and without self-interaction correction) and the nonequilibrium Green's function method. The effects of wire length, multiple terminal contacts, and pathways across the junction have been investigated. For nanoribbons with the oligopyrene motif and conventional single amine terminal groups, an increase in the wire length causes an exponential drop in the conductance. In contrast, for the nanoribbons with the oligoperylene motif and dual amine anchoring groups the predicted conductance rises with the wire length over the whole range of investigated lengths. Only when the effects of self-interaction correction are taken into account, the conductance of the oligoperylene ribbons exhibits saturation for longer members of the series. The oligoperylene nanoribbons, with dual amine groups at both terminals, show the potential to fully harness the highly conjugated system of π molecular orbitals across the junction. © 2012 American Physical Society.en
dc.description.sponsorshipThis work was supported by the Flexible Electronics Theme of the CSIRO Future Manufacturing Flagship. A.B. thanks the CSIRO for support through the Julius Career Award. The use of the NCI National Facility supercomputers at the ANU is gratefully acknowledged. The SMEAGOL project is sponsored by Science Foundation of Ireland (Grant No. 07/IN/I945), by KAUST (FIC/2010/08) and by CRANN.en
dc.publisherAmerican Physical Society (APS)en
dc.titleAnomalous length dependence of conductance of aromatic nanoribbons with amine anchoring groupsen
dc.typeArticleen
dc.identifier.journalPhysical Review Ben
dc.contributor.institutionCommonwealth Scientific and Industrial Research Organization, Melbourne, Australiaen
dc.contributor.institutionTrinity College Dublin, Dublin, Irelanden
kaust.grant.numberFIC/2010/08en
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