ArticleJournal of the American Chemical Society2018
Tunneling Probability Increases with Distance in Junctions Comprising Self-Assembled Monolayers of Oligothiophenes.
Article in Journal of the American Chemical Society, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 10 papers.
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Who cites it
10 citing papers in PubMed.
- Frontier Orbital Gating of Rectification and Conductance in Tunneling Junctions Comprising Pyridine-Terminated Molecular Wires.ACS nanoscience Au · 2025Article
- Article
- Engineering Charge Transport by Tunneling in Supramolecular Assemblies through Precise Control of Metal-Ligand Interactions.Small (Weinheim an der Bergstrasse, Germany) · 2025Article
- Charge Transport across Proteins inside Proteins: Tunneling across Encapsulin Protein Cages and the Effect of Cargo Proteins.Biomolecules · 2023Article
- Large emergent optoelectronic enhancement in molecularly cross-linked gold nanoparticle nanosheets.Communications chemistry · 2022Article
- Empirical Parameter to Compare Molecule-Electrode Interfaces in Large-Area Molecular Junctions.ACS physical chemistry Au · 2022Article
- A single atom change turns insulating saturated wires into molecular conductors.Nature communications · 2021Article
- Room temperature conductance switching in a molecular iron(iii) spin crossover junction.Chemical science · 2020Article
- Power Factor of One Molecule Thick Films and Length Dependence.ACS central science · 2019Article
- Systematic experimental study of quantum interference effects in anthraquinoid molecular wires.Nanoscale advances · 2019Article
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Authors and funding
11 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Molecular tunneling junctions should enable the tailoring of charge-transport at the quantum level through synthetic chemistry but are hindered by the dominance of the electrodes. We show that the frontier orbitals of molecules can be decoupled from the electrodes, preserving their relative energies in self-assembled monolayers even when a top-contact is applied. This decoupling leads to the remarkable observation of tunneling probabilities that increase with distance in a series of oligothiophenes, which we explain using a two-barrier tunneling model. This model is generalizable to any conjugated oligomers for which the frontier orbital gap can be determined and predicts that the molecular orbitals that dominate tunneling charge-transport can be positioned via molecular design rather than by domination of Fermi-level pinning arising from strong hybridization. The ability to preserve the electronic structure of molecules in tunneling junctions facilitates the application of well-established synthetic design rules to tailor the properties of molecular-electronic devices.
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