scholarly journals Charge transport in a single molecule transistor probed by scanning tunneling microscopy

Nanoscale ◽  
2018 ◽  
Vol 10 (3) ◽  
pp. 1487-1493 ◽  
Author(s):  
Samuel Bouvron ◽  
Romain Maurand ◽  
Alexander Graf ◽  
Philipp Erler ◽  
Luca Gragnaniello ◽  
...  
Keyword(s):  
Scanning Tunneling Microscopy ◽  
Charge Transport ◽  
Single Molecule ◽  
Gate Voltage ◽  
Scanning Tunneling ◽  
Tunneling Microscopy ◽  
The Impact ◽  
Single Molecule Transistor

Using scanning tunneling microscopy and spectroscopy, we investigate the impact of the gate voltage on the electronic levels of CoPc molecules deposited on top of a graphene/SiO2/Si device.

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.

scholarly journals En route to a dianilinyl-substituted carbo-cyclohexadiene with promising electrical properties

2015 ◽  
Vol 3 (1) ◽  
pp. 46-52 ◽  
Author(s):  
Oleg Lozynskyi ◽  
Cécile Barthes ◽  
Arnaud Rives ◽  
Valérie Maraval ◽  
Zoia Voitenko ◽  
...  
Keyword(s):  
Electrical Properties ◽  
Scanning Tunneling Microscopy ◽  
Charge Transport ◽  
Transport Properties ◽  
Single Molecule ◽  
Scanning Tunneling ◽  
Break Junction ◽  
Tunneling Microscopy

The macro-aromatic carbo-benzene core para-disubstituted by 4-anilinyl groups is known to be an efficient single-molecule conductor, exhibiting a conductance of 106 nS measured by the scanning tunneling microscopy-break junction technique. The linear carbo-butadiene analogue bearing the same anilinyl substituents was found to be less efficient, with a conductance of 2.7 nS. The reason of this difference could be elucidated through the study of the charge transport properties of a cyclically locked carbo-butadiene core in a carbo-cyclohexadiene derivative. In this paper, advances in the synthesis of this challenging dianilinyl-substituted carbo-cyclohexadiene are presented.

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 Controllable Single-Molecule Light Emission by Selective Charge Injection in Scanning Tunneling Microscopy

2019 ◽  
Vol 123 (25) ◽  
pp. 15761-15768 ◽  
Author(s):  
Xiaoyan Wu ◽  
Rulin Wang ◽  
Yu Zhang ◽  
Bowen Song ◽  
ChiYung Yam
Keyword(s):  
Scanning Tunneling Microscopy ◽  
Single Molecule ◽  
Light Emission ◽  
Charge Injection ◽  
Scanning Tunneling ◽  
Tunneling Microscopy
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