Mechanical switching of current–voltage characteristics in spiropyran single-molecule junctions

Nanoscale ◽  
2020 ◽  
Vol 12 (14) ◽  
pp. 7527-7531
Author(s):  
Takashi Tamaki ◽  
Keigo Minode ◽  
Yuichi Numai ◽  
Tatsuhiko Ohto ◽  
Ryo Yamada ◽  
...  
Keyword(s):  
Single Molecule ◽  
Mechanical Stimulus ◽  
Break Junction ◽  
Current Voltage ◽  
Single Molecule Junctions ◽  
Current Voltage Characteristics

Switching of the current–distance characteristics from rectified to symmetric was observed in break junction measurements through a mechanical stimulus.

scholarly journals Role of solvents in the electronic transport properties of single-molecule junctions

2016 ◽  
Vol 7 ◽  
pp. 1055-1067 ◽  
Author(s):  
Katharina Luka-Guth ◽  
Sebastian Hambsch ◽  
Andreas Bloch ◽  
Philipp Ehrenreich ◽  
Bernd Michael Briechle ◽  
...  
Keyword(s):  
Molecular Electronics ◽  
Single Molecule ◽  
Current Voltage ◽  
Tunnel Barriers ◽  
Single Molecule Junctions ◽  
Level Model ◽  
Current Voltage Characteristics ◽  
Solvent Molecules ◽  
Narrow Gaps

We report on an experimental study of the charge transport through tunnel gaps formed by adjustable gold electrodes immersed into different solvents that are commonly used in the field of molecular electronics (ethanol, toluene, mesitylene, 1,2,4-trichlorobenzene, isopropanol, toluene/tetrahydrofuran mixtures) for the study of single-molecule contacts of functional molecules. We present measurements of the conductance as a function of gap width, conductance histograms as well as current–voltage characteristics of narrow gaps and discuss them in terms of the Simmons model, which is the standard model for describing transport via tunnel barriers, and the resonant single-level model, often applied to single-molecule junctions. One of our conclusions is that stable junctions may form from solvents as well and that both conductance–distance traces and current–voltage characteristics have to be studied to distinguish between contacts of solvent molecules and of molecules under study.

scholarly journals Investigation on Single-Molecule Junctions Based on Current–Voltage Characteristics

Micromachines ◽  
2018 ◽  
Vol 9 (2) ◽  
pp. 67 ◽  
Author(s):  
Yuji Isshiki ◽  
Yuya Matsuzawa ◽  
Shintaro Fujii ◽  
Manabu Kiguchi
Keyword(s):  
Single Molecule ◽  
Current Voltage ◽  
Single Molecule Junctions ◽  
Current Voltage Characteristics

scholarly journals Photo-induced carbocation-enhanced charge transport in single-molecule junctions

2020 ◽  
Vol 11 (23) ◽  
pp. 6026-6030
Author(s):  
Zhongwu Bei ◽  
Yuan Huang ◽  
Yangwei Chen ◽  
Yiping Cao ◽  
Jin Li
Keyword(s):  
Scanning Tunneling Microscopy ◽  
Charge Transport ◽  
Single Molecule ◽  
Scanning Tunneling ◽  
Break Junction ◽  
Tunneling Microscopy ◽  
Single Molecule Junctions

We report the first example of photo-induced carbocation-enhanced charge transport in triphenylmethane junctions using the scanning tunneling microscopy break junction (STM-BJ) technique.

Break junction under electrochemical gating: testbed for single-molecule electronics

2015 ◽  
Vol 44 (4) ◽  
pp. 889-901 ◽  
Author(s):  
Cancan Huang ◽  
Alexander V. Rudnev ◽  
Wenjing Hong ◽  
Thomas Wandlowski
Keyword(s):  
Single Molecule ◽  
Break Junction ◽  
Single Molecule Electronics ◽  
Single Molecule Junctions ◽  
Recent Developments ◽  
Electrochemical Gating

This tutorial review highlights recent developments using break junction techniques, and emphasizes the concept of “electrochemical gating” on single-molecule junctions.

scholarly journals Charge-state assignment of nanoscale single-electron transistors from their current–voltage characteristics

Nanoscale ◽  
2019 ◽  
Vol 11 (31) ◽  
pp. 14820-14827 ◽  
Author(s):  
Bart Limburg ◽  
James O. Thomas ◽  
Jakub K. Sowa ◽  
Kyle Willick ◽  
Jonathan Baugh ◽  
...  
Keyword(s):  
Charge State ◽  
Liquid Nitrogen ◽  
Single Molecule ◽  
Single Electron ◽  
Single Electron Transistors ◽  
State Assignment ◽  
Current Voltage ◽  
Current Voltage Characteristics ◽  
Electron Transistors ◽  
Single Molecule Transistor

The charge state of a single-molecule transistor can be determined at liquid nitrogen temperatures by simply observing the IV characteristics.

scholarly journals Enhanced coupling through π-stacking in imidazole-based molecular junctions

2019 ◽  
Vol 10 (43) ◽  
pp. 9998-10002 ◽  
Author(s):  
Tianren Fu ◽  
Shanelle Smith ◽  
María Camarasa-Gómez ◽  
Xiaofang Yu ◽  
Jiayi Xue ◽  
...  
Keyword(s):  
Density Functional Theory ◽  
Single Molecule ◽  
Scanning Tunneling Microscope ◽  
Density Functional ◽  
Molecular Junctions ◽  
Scanning Tunneling ◽  
Break Junction ◽  
Functional Theory ◽  
Tunneling Microscope ◽  
Single Molecule Junctions

We demonstrate that imidazole based π–π stacked dimers form strong and efficient conductance pathways in single-molecule junctions using the scanning-tunneling microscope-break junction (STM-BJ) technique and density functional theory-based calculations.

scholarly journals Current–voltage characteristics of single-molecule diarylethene junctions measured with adjustable gold electrodes in solution

2012 ◽  
Vol 3 ◽  
pp. 798-808 ◽  
Author(s):  
Bernd M Briechle ◽  
Youngsang Kim ◽  
Philipp Ehrenreich ◽  
Artur Erbe ◽  
Dmytro Sysoiev ◽  
...  
Keyword(s):  
Transport Properties ◽  
Molecular Orbital ◽  
Single Molecule ◽  
Cyano Group ◽  
Electrical Contact ◽  
Gold Electrodes ◽  
Liquid Environment ◽  
Current Voltage ◽  
End Groups ◽  
Current Voltage Characteristics

We report on an experimental analysis of the charge transport through sulfur-free photochromic molecular junctions. The conductance of individual molecules contacted with gold electrodes and the current–voltage characteristics of these junctions are measured in a mechanically controlled break-junction system at room temperature and in liquid environment. We compare the transport properties of a series of molecules, labeled TSC, MN, and 4Py, with the same switching core but varying side-arms and end-groups designed for providing the mechanical and electrical contact to the gold electrodes. We perform a detailed analysis of the transport properties of TSC in its open and closed states. We find rather broad distributions of conductance values in both states. The analysis, based on the assumption that the current is carried by a single dominating molecular orbital, reveals distinct differences between both states. We discuss the appearance of diode-like behavior for the particular species 4Py that features end-groups, which preferentially couple to the metal electrode by physisorption. We show that the energetic position of the molecular orbital varies as a function of the transmission. Finally, we show for the species MN that the use of two cyano end-groups on each side considerably enhances the coupling strength compared to the typical behavior of a single cyano group.

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