Unexpected current–voltage characteristics of mechanically modulated atomic contacts with the presence of molecular junctions in an electrochemically assisted–MCBJ

Yang, Yang; Liu, Junyang; Shi, Feng; Wen, Haiming; Tian, Jing‐Hua; Zheng, Jueting; Schöllhorn, Bernd; Amatore, Christian; Chen, Zhongning; Tian, Zhong‐Qun

doi:10.1007/s12274-015-0937-1

Cited by 29 publications

(21 citation statements)

References 46 publications

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“…24,[39][40][41] However, the closing curves exhibit longer plateaus than the opening ones, along with a conductance jump from 10 À1 G 0 to tens of G 0 when electrodes approach back (green curves in Figure 2A). This may suggest a ''jump-to-contact'' process in the distance scale less than one gold atom, [42][43][44] where the strong electrical field inside the nanogap induced a rapid joining of the gold terminals.…”

Section: Resultsmentioning

confidence: 99%

Transition from Tunneling Leakage Current to Molecular Tunneling in Single-Molecule Junctions

Liu

Zhao

Zheng

et al. 2019

Chem

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Tunneling leakage is a major inevitable quantum obstacle that hinders further miniaturization of electronic devices. To explore the miniaturization limits of molecular electronics, the oligo(aryleneethynylene) (OAE) molecules were employed to investigate the transition distance between through-space tunneling and molecular tunneling. For the shortest OAE molecule, the intrinsic singlemolecule charge transport can be outstripped from tunneling leakage down to 0.66 nm, suggesting the potential to push the miniaturization limit of molecular electronic devices to the angstrom scale.

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Section: Resultsmentioning

confidence: 99%

Transition from Tunneling Leakage Current to Molecular Tunneling in Single-Molecule Junctions

Liu

Zhao

Zheng

et al. 2019

Chem

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“…However, when the high biases that surpassed 250 mV were applied, the formation probability of the molecular junction began to reduce (Figures S9 and S10, Supporting Information) due to the thermal effect and instability caused by the high bias. [1,[36][37][38][39][40] In order to quantitatively study the formation probability of molecular junction under different biases, we analyzed the distribution histograms of plateau lengths (Figure 1d). A home-coded algorithm program was employed to perform automatic data analysis.…”

Section: Recent Progress In Addressing Electrically Driven Single-molmentioning

confidence: 99%

Selective Fabrication of Single‐Molecule Junctions by Interface Engineering

Zeng

Wang

Qian

et al. 2020

Small

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Recent progress in addressing electrically driven single‐molecule behaviors has opened up a path toward the controllable fabrication of molecular devices. Herein, the selective fabrication of single‐molecule junctions is achieved by employing the external electric field. For molecular junctions with methylthio (–SMe), thioacetate (–SAc), amine (–NH2), and pyridyl (–PY), the evolution of their formation probabilities along with the electric field is extracted from the plateau analysis of individual single‐molecule break junction traces. With the increase of the electric field, the SMe‐anchored molecules show a different trend in the formation probability compared to the other molecular junctions, which is consistent with the density functional theory calculations. Furthermore, switching from an SMe‐anchored junction to an SAc‐anchored junction is realized by altering the electric field in a mixed solution. The results in this work provide a new approach to the controllable fabrication and modulation of single‐molecule junctions and other bottom‐up nanodevices at molecular scales.

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“…The geometrical/chemical structure of the single‐molecule junction has been characterized by point contact spectroscopy (PCS), inelastic tunnelling electron spectroscopy (IETS) and surface enhanced Raman scattering (SERS) . The electronic structure of the single‐molecule junction has been investigated by I – V and thermoelectric measurements …”

Section: Introductionmentioning

confidence: 99%

Evaluation of the Electronic Structure of Single‐Molecule Junctions Based on Current–Voltage and Thermopower Measurements: Application to C₆₀ Single‐Molecule Junction

Komoto

Isshiki

Fujii

et al. 2017

Chemistry An Asian Journal

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The electronic structure of molecular junctions has a significant impact on their transport properties. Despite the decisive role of the electronic structure, a complete characterization of the electronic structure remains a challenge. This is because there is no straightforward way of measuring electron spectroscopy for an individual molecule trapped in a nanoscale gap between two metal electrodes. Herein, a comprehensive approach to obtain a detailed description of the electronic structure in single-molecule junctions based on the analysis of current-voltage (I-V) and thermoelectric characteristics is described. It is shown that the electronic structure of the prototypical C single-molecule junction can be resolved by analyzing complementary results of the I-V and thermoelectric measurement. This combined approach confirmed that the C single-molecule junction was highly conductive with molecular electronic conductances of 0.033 and 0.003 G and a molecular Seebeck coefficient of -12 μV K . In addition, we revealed that charge transport was mediated by a LUMO whose energy level was located 0.5≈0.6 eV above the Fermi level of the Au electrode.

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Unexpected current–voltage characteristics of mechanically modulated atomic contacts with the presence of molecular junctions in an electrochemically assisted–MCBJ

Cited by 29 publications

References 46 publications

Transition from Tunneling Leakage Current to Molecular Tunneling in Single-Molecule Junctions

Transition from Tunneling Leakage Current to Molecular Tunneling in Single-Molecule Junctions

Selective Fabrication of Single‐Molecule Junctions by Interface Engineering

Evaluation of the Electronic Structure of Single‐Molecule Junctions Based on Current–Voltage and Thermopower Measurements: Application to C₆₀ Single‐Molecule Junction

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Unexpected current–voltage characteristics of mechanically modulated atomic contacts with the presence of molecular junctions in an electrochemically assisted–MCBJ

Cited by 29 publications

References 46 publications

Transition from Tunneling Leakage Current to Molecular Tunneling in Single-Molecule Junctions

Transition from Tunneling Leakage Current to Molecular Tunneling in Single-Molecule Junctions

Selective Fabrication of Single‐Molecule Junctions by Interface Engineering

Evaluation of the Electronic Structure of Single‐Molecule Junctions Based on Current–Voltage and Thermopower Measurements: Application to C60 Single‐Molecule Junction

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Evaluation of the Electronic Structure of Single‐Molecule Junctions Based on Current–Voltage and Thermopower Measurements: Application to C₆₀ Single‐Molecule Junction