Electrical molecular switch addressed by chemical stimuli.

@article{Audi2020ElectricalMS,
  title={Electrical molecular switch addressed by chemical stimuli.},
  author={H Audi and Y. Viero and N Alwhaibi and Z. K. Chen and Maksym Iazykov and A Heynderickx and Fu Xiao and David Gu{\'e}rin and Christophe Krzeminski and Iain M. Grace and Colin J. Lambert and Olivier Siri and Dominique Vuillaume and St{\'e}phane Lenfant and H Klein},
  journal={Nanoscale},
  year={2020}
}
We demonstrate that the conductance switching of benzo-bis(imidazole) molecules upon protonation depends on the lateral functional groups. The protonated H-substituted molecule shows a higher conductance than the neutral one (Gpro > Gneu), while the opposite (Gneu > Gpro) is observed for a molecule laterally functionalized by amino-phenyl groups. These results are demonstrated at various scale lengths: self-assembled monolayers, tiny nanodot-molecule junctions and single molecules. From ab… 

Figures and Tables from this paper

Achieving High Performance Molecular Rectification through Fast Screening Alkanethiol Carboxylate-Metal Complexes Electro-Active Unites

Achieving high rectifying performance of molecular scale diode devices through synthetic chemistry and device construction remain a formidable challenge due to the complexity of the charge transport

Theoretical Investigation of Design Methodology, Optimized Molecular Geometries, and Electronic Properties of Benzene-Based Single Molecular Switch with Metal Nanoelectrodes

Understanding the electronic properties at the single molecular level is the first step in designing functional electronic devices using individual molecules. This paper proposes a simulation

References

SHOWING 1-10 OF 105 REFERENCES

High on-off conductance switching ratio in optically-driven self-assembled conjugated molecular systems.

First principles density functional calculations demonstrate a better delocalization of the frontier orbitals as well as a stronger electronic coupling between the azobenzene moiety and the electrode for the cis configuration over the trans one.

Optical modulation of nano-gap tunnelling junctions comprising self-assembled monolayers of hemicyanine dyes

A mechanism in which a fraction of molecules enters an excited state that brings the conjugated portion of the monolayer into resonance with the electrodes is proposed, supported by calculations showing the delocalization of molecular orbitals near the Fermi energy in the excited and cationic states, but not the ground state.

Effect of anchoring groups on single-molecule conductance: comparative study of thiol-, amine-, and carboxylic-acid-terminated molecules.

Insight into the binding strengths of these anchoring groups to gold electrodes is obtained by statistically analyzing the stretching length of molecular junctions.

Conductance of single alkanedithiols: conduction mechanism and effect of molecule-electrode contacts.

The conduction mechanism in alkanedithiols is due to electron tunneling or superexchange via the bonds along the molecules, and the two sets of conductance peaks are due to two different microscopic configurations of the molecule-electrode contacts.

Mixed Monolayers of Spiropyrans Maximize Tunneling Conductance Switching by Photoisomerization at the Molecule–Electrode Interface in EGaIn Junctions

This paper describes the photoinduced switching of conductance in tunneling junctions comprising self-assembled monolayers of a spiropyran moiety using eutectic Ga–In top contacts and observes an increase in the current density J when the closed form is irradiated with UV light to induce the ring-opening reaction.

Azobenzenes as light-controlled molecular electronic switches in nanoscale metal-molecule-metal junctions.

The measured 30-fold increase in conductance is consistent with the expected decrease in tunneling barrier length resulting from the conformational change of the Azo molecule.

Charge transport through molecular switches

The fascinating research on charge transport through switchable molecules is reviewed and a detailed understanding of the relation between coupling and switchability will be of key importance for both future research and technology.

In-Place Modulation of Rectification in Tunneling Junctions Comprising Self-Assembled Monolayers

The ability to convert a tunneling junction reversibly between a diode and a resistor via an effect that is intrinsic to the molecules in the junction extends the possible applications of Molecular Electronics to reconfigurable circuits and other new functionalities that do not have direct analogs in conventional semiconductor devices.

Multi-responsive photo- and chemo-electrical single-molecule switches.

The unique multistimuli response and the synthetic versatility to control the switching schemes of this single-molecule device suggest spiropyran derivatives as key candidates for molecular circuitry.

Light-powered electrical switch based on cargo-lifting azobenzene monolayers.

It is shown that, upon irradiation, azobenzene SAMs incorporated in a junction between an Au(111) surface and a mercury drop are able to lift the “heavy” Hg drop, and reversibly photoswitch the current flowing through the junction, which provides an ideal system as a potential “cargo” lifter.
...