Determination of the Molecular Electrical Properties of Self-Assembled Monolayers of Compounds of Interest in Molecular Electronics

2001 ◽  
Vol 123 (10) ◽  
pp. 2454-2455 ◽  
Author(s):  
Fu-Ren F. Fan ◽  
Jiping Yang ◽  
Shawn M. Dirk ◽  
David W. Price ◽  
Dimitry Kosynkin ◽  
...  
Keyword(s):  
Electrical Properties ◽  
Molecular Electronics ◽  
Self Assembled Monolayers ◽  
Assembled Monolayers ◽  
Self Assembled

scholarly journals Conductance Switching of Azobenzene-Based Self-Assembled Monolayers on Cobalt Probed by UHV Conductive-AFM.

Nanoscale ◽  
2021 ◽  
Author(s):  
Louis Thomas ◽  
Imane Arbouch ◽  
David Guérin ◽  
Xavier Wallart ◽  
Colin van Dyck ◽  
...  
Keyword(s):  
Electrical Properties ◽  
Covalent Bond ◽  
Molecular Junctions ◽  
Self Assembled Monolayers ◽  
Conductive Afm ◽  
Conductance Switching ◽  
Assembled Monolayers ◽  
Self Assembled

We report the formation of self-assembled monolayers of a molecular photoswitch (azobenzene-bithiophene derivative, AzBT) on cobalt via a thiol covalent bond. We study the electrical properties of the molecular junctions...

Electrical properties of end-group functionalised Self-Assembled Monolayers

1997 ◽  
Vol 36 (1-4) ◽  
pp. 119-122 ◽  
Author(s):  
J. Collet ◽  
M. Bonnier ◽  
O. Bouloussa ◽  
F. Rondelez ◽  
D. Vuillaume
Keyword(s):  
Electrical Properties ◽  
Self Assembled Monolayers ◽  
Assembled Monolayers ◽  
Self Assembled ◽  
End Group

Revisiting the determination of full steady-state coverage of redox centers on self-assembled monolayers

2012 ◽  
Vol 16 (1) ◽  
pp. 6-9 ◽  
Author(s):  
Olivier Alévêque ◽  
Pierre-Yves Blanchard ◽  
Tony Breton ◽  
Marylène Dias ◽  
Christelle Gautier ◽  
...  
Keyword(s):  
Steady State ◽  
Self Assembled Monolayers ◽  
Assembled Monolayers ◽  
Self Assembled ◽  
Redox Centers

scholarly journals Mobility of charge carriers in self-assembled monolayers

2019 ◽  
Vol 10 ◽  
pp. 2449-2458
Author(s):  
Zhihua Fu ◽  
Tatjana Ladnorg ◽  
Hartmut Gliemann ◽  
Alexander Welle ◽  
Asif Bashir ◽  
...  
Keyword(s):  
Charge Transport ◽  
Charge Carrier Mobility ◽  
Charge Carriers ◽  
Self Assembled Monolayers ◽  
Force Microscopy ◽  
Atomic Force ◽  
Mobility Of Charge Carriers ◽  
Assembled Monolayers ◽  
Self Assembled

We present a new approach to study charge transport within 2D layers of organic semi-conductors (OSCs) using atomic force microscopy (AFM)-based lithography applied to self-assembled monolayers (SAMs), fabricated from appropriate organothiols. The extent of lateral charge transport was investigated by insulating pre-defined patches within OSC-based SAMs with regions of insulating SAM made from large band gap alkanethiolates. The new method is demonstrated using a phenyl-linked anthracenethiolate (PAT), 4-(anthracene-2-ylethynyl)benzyl thiolate. I–V characteristics of differently shaped PAT-islands were measured using the AFM tip as a top electrode. We were able to determine a relationship between island size and electrical conductivity, and from this dependence, we could obtain information on the lateral charge transport and charge carrier mobility within the thin OSC layers. Our study demonstrates that AFM nanografting of appropriately functionalized OSC molecules provides a suitable method to determine intrinsic mobilities of charge carriers in OSC thin films. In particular, this method is rather insensitive with regard to influence of grain boundaries and other defects, which hamper the application of conventional methods for the determination of mobilities in macroscopic samples.

A surprising way to control the charge transport in molecular electronics: the subtle impact of the coverage of self-assembled monolayers of floppy molecules adsorbed on metallic electrodes

2017 ◽  
Vol 204 ◽  
pp. 35-52 ◽  
Author(s):  
Ioan Bâldea
Keyword(s):  
Molecular Electronics ◽  
Single Molecule ◽  
Molecular Species ◽  
Molecular Conformation ◽  
Theoretical Work ◽  
Self Assembled Monolayers ◽  
Scanning Tunneling ◽  
Assembled Monolayers ◽  
Self Assembled ◽  
Twisting Angle

Inspired by earlier attempts in organic electronics aiming at controlling charge injection from metals into organic materials by manipulating the Schottky energy barrier using self-assembled monolayers (SAMs), recent experimental and theoretical work in molecular electronics showed that metal–organic interfaces can be controlled via changes in the metal work function that are induced by SAMs. In this paper we indicate a different route to achieve interface-driven control over the charge transfer/transport at the molecular scale. It is based on the fact that, in floppy molecule based SAMs, the molecular conformation can be tuned by varying the coverage of the adsorbate. We demonstrate this effect with the aid of benchmark molecules that are often used to fabricate nanojunctions and consist of two rings that can easily rotate relative to each other. We show that, by varying the coverage of the SAM, the twisting angle φ of the considered molecular species can be modified by a factor of two. Given the fact that the low bias conductance G scales as cos2 φ, this results in a change in G of over one order of magnitude for the considered molecular species. Tuning the twisting angle by controlling the SAM coverage may be significant, e.g., for current efforts to fabricate molecular switches. Conversely, the lack of control over the local SAM coverage may be problematic for the reproducibility and interpretation of the STM (scanning tunneling microscope) measurements on repeatedly forming single molecule break junctions.

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