Modulate and Control of Detailed Electron Transport of Single Molecule

2016 ◽  
pp. 115-168 ◽  
Keyword(s):  
Electron Transport ◽  
Single Molecule ◽  
And Control

scholarly journals Mechanical single-molecule potentiometers with large switching factors from ortho-pentaphenylene foldamers

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Jinshi Li ◽  
Pingchuan Shen ◽  
Shijie Zhen ◽  
Chun Tang ◽  
Yiling Ye ◽  
...  
Keyword(s):  
Charge Transport ◽  
Single Molecule ◽  
Scanning Tunneling ◽  
Tunneling Microscopy ◽  
Helical Structures ◽  
Anchoring Groups ◽  
Molecular Conductance ◽  
And Control ◽  
Helical Molecules ◽  
Shed Light

AbstractMolecular potentiometers that can indicate displacement-conductance relationship, and predict and control molecular conductance are of significant importance but rarely developed. Herein, single-molecule potentiometers are designed based on ortho-pentaphenylene. The ortho-pentaphenylene derivatives with anchoring groups adopt multiple folded conformers and undergo conformational interconversion in solutions. Solvent-sensitive multiple conductance originating from different conformers is recorded by scanning tunneling microscopy break junction technique. These pseudo-elastic folded molecules can be stretched and compressed by mechanical force along with a variable conductance by up to two orders of magnitude, providing an impressively higher switching factor (114) than the reported values (ca. 1~25). The multichannel conductance governed by through-space and through-bond conducting pathways is rationalized as the charge transport mechanism for the folded ortho-pentaphenylene derivatives. These findings shed light on exploring robust single-molecule potentiometers based on helical structures, and are conducive to fundamental understanding of charge transport in higher-order helical molecules.

scholarly journals Quantum Algorithm for Simulating Single-Molecule Electron Transport

2021 ◽  
Vol 12 (4) ◽  
pp. 1256-1261
Author(s):  
Soran Jahangiri ◽  
Juan Miguel Arrazola ◽  
Alain Delgado
Keyword(s):  
Electron Transport ◽  
Single Molecule ◽  
Quantum Algorithm

scholarly journals Shifting the Voltage Drop in Electron Transport Through a Single Molecule

2015 ◽  
Vol 115 (1) ◽  
Author(s):  
Sujoy Karan ◽  
David Jacob ◽  
Michael Karolak ◽  
Christian Hamann ◽  
Yongfeng Wang ◽  
...  
Keyword(s):  
Electron Transport ◽  
Single Molecule ◽  
Voltage Drop

Modulating electron transport through single-molecule junctions by heteroatom substitution

2020 ◽  
Vol 8 (20) ◽  
pp. 6826-6831 ◽  
Author(s):  
Ya-Hao Wang ◽  
Hong Huang ◽  
Zhou Yu ◽  
Ju-Fang Zheng ◽  
Yong Shao ◽  
...  
Keyword(s):  
Electron Transport ◽  
Single Molecule ◽  
Molecular Level ◽  
Heteroatom Substitution ◽  
Single Molecule Junctions

Heteroatom substitutions in phenyl-based molecules are used to modulate electron transport at the single molecular level measured by STM-BJ.

scholarly journals Origin and mechanism analysis of asymmetric current fluctuations in single-molecule junctions

RSC Advances ◽  
2018 ◽  
Vol 8 (69) ◽  
pp. 39408-39413
Author(s):  
Chunhui Gu ◽  
Hao Wang ◽  
Hantao Sun ◽  
Jianhui Liao ◽  
Shimin Hou ◽  
...  
Keyword(s):  
Electron Transport ◽  
Single Molecule ◽  
Transport Process ◽  
Current Noise ◽  
Current Fluctuations ◽  
Inelastic Electron ◽  
Mechanism Analysis ◽  
Single Molecule Junctions

The asymmetric current noise in a single-molecule device was observed, which is relevant to an inelastic electron transport process.

Environmental Effects on the Single Molecule Conductance of bis(thiahexyl)oligothiophenes

2009 ◽  
Vol 1154 ◽  
Author(s):  
Edmund Leary ◽  
Horst Höbenreich ◽  
Simon J. Higgins ◽  
Harm van Zalinge ◽  
Wolfgang Haiss ◽  
...  
Keyword(s):  
Electron Transport ◽  
Single Molecule ◽  
Environmental Effects ◽  
Electronic Devices ◽  
Molecular Wires ◽  
Water Molecules ◽  
Ambient Water ◽  
Molecular Electronic ◽  
Molecular Conductance ◽  
Non Equilibrium Green’S Function

AbstractSimple alkanedithiols exhibit the same molecular conductance whether measured in air, under vacuum or under liquids of different polarity. Here, we show that the presence of water ‘gates’ the conductance of a family of oligothiophene–containing molecular wires, and that the longer the oligothiophene, the larger is the effect; for the longest example studied, the molecular conductance is over two orders of magnitude larger in the presence of water, an unprecedented result suggesting that ambient water is a crucial factor to be taken into account when measuring single molecule conductances (SMC), or in the design of future molecular electronic devices. Theoretical investigation of electron transport through the molecules, using the ab initio non-equilibrium Green's function (SMEAGOL) method, shows that water molecules interact with the thiophene rings, shifting the transport resonances enough to increase greatly the SMC of the longer, more conjugated examples.

Electron Transport Properties of a Carotene Molecule in a Metal−(Single Molecule)−Metal Junction

2003 ◽  
Vol 107 (25) ◽  
pp. 6162-6169 ◽  
Author(s):  
Ganesh K. Ramachandran ◽  
John K. Tomfohr ◽  
Jun Li ◽  
Otto F. Sankey ◽  
Xristo Zarate ◽  
...  
Keyword(s):  
Electron Transport ◽  
Transport Properties ◽  
Single Molecule ◽  
Electron Transport Properties
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