Graphene-porphyrin single-molecule transistors

Mol, Jan A.; Lau, Chit Siong; Lewis, Wilfred J. M.; Sadeghi, Hatef; Roche, Cécile; Cnossen, Arjen; Warner, Jamie H.; Lambert, Colin J.; Anderson, Harry L.; Briggs, G. Andrew D.

doi:10.1039/c5nr03294f

Cited by 103 publications

(116 citation statements)

References 35 publications

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“…The bonding and antibonding MOs both lie above the Fermi energy and will henceforth be referred to as the LUMO and LUMO+1 respectively 29 . The choice of the site energies above is not of critical importance, particularly since many currently available experimental techniques allow electrostatic control of the molecular energy levels through a gate electrode 20,[30][31][32] . We begin by considering transport in the absence of any vibrational coupling.…”

Section: Resultsmentioning

confidence: 99%

Environment-assisted quantum transport through single-molecule junctions

Sowa

Mol

Briggs

et al. 2017

Phys. Chem. Chem. Phys.

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Single-molecule electronics has been envisioned as the ultimate goal in the miniaturisation of electronic circuits. While the aim of incorporating single-molecule junctions into modern technology still proves elusive, recent developments in this field have begun to enable experimental investigation of fundamental concepts within the area of chemical physics. One such phenomenon is the concept of Environment-Assisted Quantum Transport which has emerged from the investigation of exciton transport in photosynthetic complexes. Here, we study charge transport through a two-site molecular junction coupled to a vibrational environment. We demonstrate that vibrational interactions can significantly enhance the current through specific molecular orbitals. Our study offers a clear pathway towards finding and identifying environment-assisted transport phenomena in charge transport settings.

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Section: Resultsmentioning

confidence: 99%

Environment-assisted quantum transport through single-molecule junctions

Sowa

Mol

Briggs

et al. 2017

Phys. Chem. Chem. Phys.

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“…At the same time, several authors ( 22 , 23 ) have proposed novel single-molecule transistors, where the electrodes are created by electroburning a nanosized gap across either a graphene or a few-layers graphene flake. The contact with the molecules, which present planar anchoring groups, such as anthracene and pyrene, is typically achieved by π-π stacking ( 22 , 24 , 25 ). Unfortunately, all aforementioned devices present a number of limitations.…”

Section: Introductionmentioning

confidence: 99%

Stable anchoring chemistry for room temperature charge transport through graphite-molecule contacts

et al. 2017

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“…Figure 5d shows the corresponding stability diagram (differential conductance dI / dV as a function of bias and gate voltages) in which diamond‐like features are visible 24,25. These Coulomb diamonds are characteristic of weakly coupled quantum dots, while the presence of multiple overlapping diamonds suggests that transport occurs through several pGNRs 26. The observed blockade regions range from ≈0.2 to ≈0.75 V bias (see Section 6, Supporting Information for additional devices).…”

Section: Figurementioning

confidence: 99%

Massive Dirac Fermion Behavior in a Low Bandgap Graphene Nanoribbon Near a Topological Phase Boundary

et al. 2020

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Graphene nanoribbons (GNRs) have attracted much interest due to their largely modifiable electronic properties. Manifestation of these properties requires atomically precise GNRs which can be achieved through a bottom–up synthesis approach. This has recently been applied to the synthesis of width‐modulated GNRs hosting topological electronic quantum phases, with valence electronic properties that are well captured by the Su–Schrieffer–Heeger (SSH) model describing a 1D chain of interacting dimers. Here, ultralow bandgap GNRs with charge carriers behaving as massive Dirac fermions can be realized when their valence electrons represent an SSH chain close to the topological phase boundary, i.e., when the intra‐ and interdimer coupling become approximately equal. Such a system has been achieved via on‐surface synthesis based on readily available pyrene‐based precursors and the resulting GNRs are characterized by scanning probe methods. The pyrene‐based GNRs (pGNRs) can be processed under ambient conditions and incorporated as the active material in a field effect transistor. A quasi‐metallic transport behavior is observed at room temperature, whereas at low temperature, the pGNRs behave as quantum dots showing single‐electron tunneling and Coulomb blockade. This study may enable the realization of devices based on carbon nanomaterials with exotic quantum properties.

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Graphene-porphyrin single-molecule transistors

Cited by 103 publications

References 35 publications

Environment-assisted quantum transport through single-molecule junctions

Environment-assisted quantum transport through single-molecule junctions

Stable anchoring chemistry for room temperature charge transport through graphite-molecule contacts

Massive Dirac Fermion Behavior in a Low Bandgap Graphene Nanoribbon Near a Topological Phase Boundary

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