scholarly journals An MCBJ case study: The influence of π-conjugation on the single-molecule conductance at a solid/liquid interface

2011 ◽  
Vol 2 ◽  
pp. 699-713 ◽  
Author(s):  
Wenjing Hong ◽  
Hennie Valkenier ◽  
Gábor Mészáros ◽  
David Zsolt Manrique ◽  
Artem Mishchenko ◽  
...  
Keyword(s):  
Quantitative Analysis ◽  
Charge Transport ◽  
Single Molecule ◽  
Break Junction ◽  
Current Voltage ◽  
Highly Sensitive ◽  
Solid Liquid Interface ◽  
Solid Liquid ◽  
Conjugated Molecule

π-Conjugation plays an important role in charge transport through single molecular junctions. We describe in this paper the construction of a mechanically controlled break-junction setup (MCBJ) equipped with a highly sensitive log I–V converter in order to measure ultralow conductances of molecular rods trapped between two gold leads. The current resolution of the setup reaches down to 10 fA. We report single-molecule conductance measurements of an anthracene-based linearly conjugated molecule (AC), of an anthraquinone-based cross-conjugated molecule (AQ), and of a dihydroanthracene-based molecule (AH) with a broken conjugation. The quantitative analysis of complementary current–distance and current–voltage measurements revealed details of the influence of π-conjugation on the single-molecule conductance.

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.

Quantitative Analysis of Diffusive Reactions at the Solid–Liquid Interface in Finite Systems

2014 ◽  
Vol 5 (4) ◽  
pp. 695-699 ◽  
Author(s):  
Thomas C. T. Michaels ◽  
Alexander K. Buell ◽  
Eugene M. Terentjev ◽  
Tuomas P. J. Knowles
Keyword(s):  
Quantitative Analysis ◽  
Liquid Interface ◽  
Finite Systems ◽  
Solid Liquid Interface ◽  
Solid Liquid

The role of vibrations in single-molecule charge transport: A case study of oligoynes with pyridine anchor groups

2013 ◽  
Vol 250 (11) ◽  
pp. 2452-2457 ◽  
Author(s):  
Stefan Ballmann ◽  
Wolfgang Hieringer ◽  
Rainer Härtle ◽  
Pedro B. Coto ◽  
Martin R. Bryce ◽  
...  
Keyword(s):  
Charge Transport ◽  
Single Molecule

scholarly journals Graphene transistors for real-time monitoring molecular self-assembly dynamics

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Marco Gobbi ◽  
Agostino Galanti ◽  
Marc-Antoine Stoeckel ◽  
Bjorn Zyska ◽  
Sara Bonacchi ◽  
...  
Keyword(s):  
Real Time ◽  
Self Assembly ◽  
Molecular Assembly ◽  
Self Organization ◽  
Highly Sensitive ◽  
Graphene Devices ◽  
Solid Liquid Interface ◽  
Solid Liquid ◽  
Molecular Ensemble

Abstract Mastering the dynamics of molecular assembly on surfaces enables the engineering of predictable structural motifs to bestow programmable properties upon target substrates. Yet, monitoring self-assembly in real time on technologically relevant interfaces between a substrate and a solution is challenging, due to experimental complexity of disentangling interfacial from bulk phenomena. Here, we show that graphene devices can be used as highly sensitive detectors to read out the dynamics of molecular self-assembly at the solid/liquid interface in-situ. Irradiation of a photochromic molecule is used to trigger the formation of a metastable self-assembled adlayer on graphene and the dynamics of this process are monitored by tracking the current in the device over time. In perspective, the electrical readout in graphene devices is a diagnostic and highly sensitive means to resolve molecular ensemble dynamics occurring down to the nanosecond time scale, thereby providing a practical and powerful tool to investigate molecular self-organization in 2D.

Single‐Molecule Measurement of Adsorption Free Energy at the Solid–Liquid Interface

2019 ◽  
Vol 131 (41) ◽  
pp. 14676-14680 ◽  
Author(s):  
Chao Zhan ◽  
Gan Wang ◽  
Xia‐Guang Zhang ◽  
Zhi‐Hao Li ◽  
Jun‐Ying Wei ◽  
...  
Keyword(s):  
Free Energy ◽  
Single Molecule ◽  
Liquid Interface ◽  
Adsorption Free Energy ◽  
Solid Liquid Interface ◽  
Solid Liquid

Quantitative analysis of layering and in-plane structural ordering at an alumina–aluminum solid–liquid interface

2011 ◽  
Vol 59 (11) ◽  
pp. 4378-4386 ◽  
Author(s):  
Y. Kauffmann ◽  
S.H. Oh ◽  
C.T. Koch ◽  
A. Hashibon ◽  
C. Scheu ◽  
...  
Keyword(s):  
Quantitative Analysis ◽  
Liquid Interface ◽  
Structural Ordering ◽  
Solid Liquid Interface ◽  
Solid Liquid

Neutron Reflectometry of Membrane Protein Assemblies at the Solid/Liquid Interface

2005 ◽  
Vol 58 (9) ◽  
pp. 674 ◽  
Author(s):  
Stephen A. Holt ◽  
Jeremy H. Lakey ◽  
Sofian M. Daud ◽  
Neil Keegan
Keyword(s):  
Quantitative Analysis ◽  
Membrane Protein ◽  
Self Assembly ◽  
Neutron Reflectometry ◽  
The Self ◽  
Water Molecules ◽  
Gold Substrate ◽  
Protein Assemblies ◽  
Solid Liquid Interface ◽  
Solid Liquid

Neutron reflectometry has been used to study the self-assembly of a membrane protein, OmpF, onto a gold-coated silicon substrate from solution. OmpF associates into trimers and has been modified so that each trimer binds to the gold substrate through cysteine residues. Quantitative analysis of the data revealed that 12% of the surface was covered by the oriented protein with 27600 water molecules surrounding each trimer.

Single‐Molecule Measurement of Adsorption Free Energy at the Solid–Liquid Interface

2019 ◽  
Vol 58 (41) ◽  
pp. 14534-14538 ◽  
Author(s):  
Chao Zhan ◽  
Gan Wang ◽  
Xia‐Guang Zhang ◽  
Zhi‐Hao Li ◽  
Jun‐Ying Wei ◽  
...  
Keyword(s):  
Free Energy ◽  
Single Molecule ◽  
Liquid Interface ◽  
Adsorption Free Energy ◽  
Solid Liquid Interface ◽  
Solid Liquid
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