Organic Nano-Devices Composed by Carbon NanoTube/Oligophenylenes/Carbon NanoTube Junctions: Transition-Voltage Spectroscopy, Applications and Chirality versus Geometry

Júnior, Carlos Alberto Brito da Silva; Pinheiro, F. A.; Nero, Jordan Del

doi:10.1166/jnn.2016.12706

Cited by 4 publications

(2 citation statements)

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“…First discussed [47] in terms of tunnelling over an energy barrier but now understood to be better interpreted in terms of coherent Landauer [48] transport, TVS studies have been used both experimentally and theoretically to investigate a variety of partially bridged and fully bridged electrode-molecule-electrode systems. Studies are typically based on traditional gold electrodes [49] but also novel approaches such as contacts made with graphene and carbon nanotubes [50][51][52].…”

Section: Single Molecule Electronic Devicementioning

confidence: 99%

Nanoscale junctions for single molecule electronics fabricated using bilayer nanoimprint lithography combined with feedback controlled electromigration

2020

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Nanoimprint lithography (NIL) is a fast, simple and high throughput technique that allows fabrication of structures with nanometre precision features at low cost. We present an advanced bilayer nanoimprint lithography approach to fabricate four terminal nanojunction devices for use in single molecule electronic studies. In the first part of this work, we demonstrate a NIL lift-off process using a bilayer resist technique that negates problems associated with metal side-wall tearing during liftoff. In addition to precise nanoscale feature replication, we show that it is possible to imprint micronsized features while still maintaining a bilayer structure enabling an undercut resist structure to be formed. This is accomplished by choosing suitable imprint parameters as well as residual layer etching depth and development time. We then use a feedback controlled electromigration procedure, to produce room-temperature stable nanogap electrodes with sizes below 2 nm. This approach facilitates the integration of molecules in stable, solid-state molecular electronic devices as demonstrated by incorporating benzenethiol as molecular bridges between the electrodes and characterizing its electronics properties through current-voltage measurements. The observation of molecular transport signatures, showing current suppression in the I-V behaviour at low voltage, which is then lifted at high voltage, signifying on-and off-resonant transport through molecular levels as a function of voltage, is confirmed in repeated I-V sweeps. The large conductance, symmetry of the I-V sweep and small value of the voltage minimum in Transition Voltage Spectroscopy indicates the bridging of the two benzenethiol molecules is by -stacking.

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Section: Single Molecule Electronic Devicementioning

confidence: 99%

Nanoscale junctions for single molecule electronics fabricated using bilayer nanoimprint lithography combined with feedback controlled electromigration

2020

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“…For CNT-molecule-CNT devices, the interfacial states are significant, which generally dominate the electronic structures around the Fermi level and, thus, primarily influence the transport characteristics of CNT-based devices. Prior studies examining model CNT-molecule-CNT structures found that a series of factors could affect the electrical conductance of a molecular wire, such as the length of molecule, 8,28,29 size of CNTs, 30 geometry and coupling strength of the contact, 24,31,32 passivation chemistry at the cut ends of CNTs [33][34][35] and so on. Heteroatom doping can change the local electronic states at the interface between the molecule and electrodes and then regulate electron transport behavior.…”

Section: Introductionmentioning

confidence: 99%

Controlling the electronic transport through the carbon nanotube junction via the local electronic environment

Xu,

Zhao,

Zhang

et al. 2024

New J. Chem.

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Theoretical investigation of electronic transport mechanism in molecular junction by tunneling

Moura-Moreira

Ferreira

Nero

2021

Physica B: Condensed Matter

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Organic Nano-Devices Composed by Carbon NanoTube/Oligophenylenes/Carbon NanoTube Junctions: Transition-Voltage Spectroscopy, Applications and Chirality versus Geometry

Cited by 4 publications

References 0 publications

Nanoscale junctions for single molecule electronics fabricated using bilayer nanoimprint lithography combined with feedback controlled electromigration

Nanoscale junctions for single molecule electronics fabricated using bilayer nanoimprint lithography combined with feedback controlled electromigration

Controlling the electronic transport through the carbon nanotube junction via the local electronic environment

Theoretical investigation of electronic transport mechanism in molecular junction by tunneling

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