scholarly journals Fabrication of metallic and non-metallic top electrodes for large-area molecular junctions

Nanoscale ◽  
2021 ◽  
Author(s):  
Elena Gorenskaia ◽  
Kelly Lauren Turner ◽  
Santiago Martín Solans ◽  
Pilar Cea ◽  
Paul Low
Keyword(s):  
Electronic Properties ◽  
Molecular Electronics ◽  
Molecular Junctions ◽  
Large Area ◽  
Molecular Monolayers

Molecular junctions have proven invaluable tools through which to explore the electronic properties of molecules and molecular monolayers. In seeking to develop a viable molecular electronics based technology it becomes...

Molecular Electronics with Large-area Molecular Junctions

2008 ◽  
Vol 1091 ◽  
Author(s):  
Hylke B. Akkerman ◽  
Auke J. Kronemeijer ◽  
Paul W. M. Blom ◽  
Paul van Hal ◽  
Dago M. de Leeuw ◽  
...  
Keyword(s):  
Molecular Electronics ◽  
Data Storage ◽  
Molecular Junctions ◽  
Exponential Dependence ◽  
Large Area ◽  
Storage Unit ◽  
Tunneling Model ◽  
Current Voltage ◽  
Standing Up ◽  
Full Standing

AbstractA technology is demonstrated to fabricate reliable metal-molecule-metal junctions with unprecedented device diameters up to 100 μm. The yield of these molecular junctions is close to unity. Preliminary stability investigations have shown a shelf life of years and no deterioration upon cycling. Key ingredients are the use of a conducting polymer layer (PEDOT:PSS) sandwiched between a bottom electrode with a self-assembled monolayer (SAM) and the top electrode to prevent electrical shorts, and processing in lithographically defined vertical interconnects (vias) to prevent both parasitic currents and interaction between the environment and the SAM [1].Modeling the current–voltage (I–V) characteristics of alkanedithiols with the Simmons model showed that the low dielectric constant of the molecules in the junction results in a strong image potential that should be included in the tunneling model. Including image force effects, the tunneling model consistently describes the current-voltage characteristics of the molecular junctions up to 1 V bias for different molecule lengths [2].Furthermore, we demonstrate a dependence of the I–V characteristics on the monolayer quality. A too low concentration of long alkanedithiols leads to the formation of looped molecules, resulting in a 50-fold increase of the current through the SAM. To obtain an almost full standing-up phase of 1,14-tetradecanedithiol (C14) a 30 mM concentration is required, whereas a 0.3 mM concentration leads to a highly looped monolayer. The conduction through the full standing-up phase of C14 and C16 is in accordance with the exponential dependence on molecular length as obtained from shorter alkanedithiols [3].Finally, a fully functional solid-state molecular electronic switch is manufactured by conventional processing techniques. The molecular switch is based on a monolayer of photochromic diarylethene molecular switches. The monolayer reversibly switches the conductance by more than one order of magnitude between the two conductance states via optical addressing. This reversible conductance switch operates as an electronic ON/OFF switch (or a reprogrammable data storage unit) that can be optically written and electronically read [4].

scholarly journals Towards molecular electronics with large-area molecular junctions

Nature ◽  
2006 ◽  
Vol 441 (7089) ◽  
pp. 69-72 ◽  
Author(s):  
Hylke B. Akkerman ◽  
Paul W. M. Blom ◽  
Dago M. de Leeuw ◽  
Bert de Boer
Keyword(s):  
Molecular Electronics ◽  
Molecular Junctions ◽  
Large Area

scholarly journals Organic field-effect transistors as a test-bed for molecular electronics: A combined study with large-area molecular junctions

2012 ◽  
Vol 13 (11) ◽  
pp. 2502-2507 ◽  
Author(s):  
Kamal Asadi ◽  
Ilias Katsouras ◽  
Jan Harkema ◽  
Fatemeh Gholamrezaie ◽  
Edsger C.P. Smits ◽  
...  
Keyword(s):  
Molecular Electronics ◽  
Field Effect ◽  
Field Effect Transistors ◽  
Molecular Junctions ◽  
Organic Field Effect Transistors ◽  
Test Bed ◽  
Large Area

scholarly journals Carbon tips for all-carbon single-molecule electronics

Nanoscale ◽  
2014 ◽  
Vol 6 (12) ◽  
pp. 6953-6958 ◽  
Author(s):  
Y. J. Dappe ◽  
C. González ◽  
J. C. Cuevas
Keyword(s):  
Ab Initio ◽  
Molecular Electronics ◽  
Single Molecule ◽  
Carbon Nanostructures ◽  
Molecular Junctions ◽  
Single Molecule Electronics ◽  
Single Molecule Junctions ◽  
Carbon Based

We present anab initiostudy of the use of carbon-based tips as electrodes in single-molecule junctions. We show that carbon tips can be combined with other carbon nanostructures to form all-carbon molecular junctions with molecules like benzene or C60. Results show that the use of carbon tips can lead to conductive molecular junctions and open new perspectives in all-carbon molecular electronics.

scholarly journals Electrical characteristics of conjugated self-assembled monolayers in large-area molecular junctions

2010 ◽  
Vol 97 (17) ◽  
pp. 173302 ◽  
Author(s):  
A. J. Kronemeijer ◽  
E. H. Huisman ◽  
H. B. Akkerman ◽  
A. M. Goossens ◽  
I. Katsouras ◽  
...  
Keyword(s):  
Molecular Junctions ◽  
Self Assembled Monolayers ◽  
Electrical Characteristics ◽  
Large Area ◽  
Assembled Monolayers ◽  
Self Assembled

scholarly journals Nanofabrication Techniques in Large-Area Molecular Electronic Devices

2020 ◽  
Vol 10 (17) ◽  
pp. 6064
Author(s):  
Lucía Herrer ◽  
Santiago Martín ◽  
Pilar Cea
Keyword(s):  
Molecular Electronics ◽  
Global Economy ◽  
Electronic Devices ◽  
Functional Materials ◽  
Large Area ◽  
Molecular Electronic ◽  
Hybrid Technology ◽  
Top Contact ◽  
Silicon Based ◽  
Molecular Electronic Devices

The societal impact of the electronics industry is enormous—not to mention how this industry impinges on the global economy. The foreseen limits of the current technology—technical, economic, and sustainability issues—open the door to the search for successor technologies. In this context, molecular electronics has emerged as a promising candidate that, at least in the short-term, will not likely replace our silicon-based electronics, but improve its performance through a nascent hybrid technology. Such technology will take advantage of both the small dimensions of the molecules and new functionalities resulting from the quantum effects that govern the properties at the molecular scale. An optimization of interface engineering and integration of molecules to form densely integrated individually addressable arrays of molecules are two crucial aspects in the molecular electronics field. These challenges should be met to establish the bridge between organic functional materials and hard electronics required for the incorporation of such hybrid technology in the market. In this review, the most advanced methods for fabricating large-area molecular electronic devices are presented, highlighting their advantages and limitations. Special emphasis is focused on bottom-up methodologies for the fabrication of well-ordered and tightly-packed monolayers onto the bottom electrode, followed by a description of the top-contact deposition methods so far used.

Ultrathin π-Conjugated Polymer Films for Simple Fabrication of Large-Area Molecular Junctions

ChemPhysChem ◽  
2007 ◽  
Vol 8 (4) ◽  
pp. 515-518 ◽  
Author(s):  
Federico Milani ◽  
Christian Grave ◽  
Violetta Ferri ◽  
Paolo Samorì ◽  
Maria Anita Rampi
Keyword(s):  
Polymer Films ◽  
Conjugated Polymer ◽  
Molecular Junctions ◽  
Large Area

Temperature-Dependent Charge Transport of Large-Area Molecular Junctions with PEDOT:PSS Electrodes

2020 ◽  
Vol 12 (3) ◽  
pp. 333-336
Author(s):  
Jungmoon Lim ◽  
Gahyun Ahn ◽  
Inho Jeong ◽  
Hyunwook Song
Keyword(s):  
Charge Transport ◽  
Annealing Temperature ◽  
Molecular Junctions ◽  
Electrical Characteristics ◽  
Large Area ◽  
Temperature Dependent ◽  
Interfacial Contact ◽  
End Groups ◽  
Backbone Structure ◽  
Dependent Transport

We report on the temperature-dependent transport behaviors of large-area molecular junctions fabricated with poly-(3,4-ethylene-dioxythiophene) stabilized with polystyrene sulphonic acid (PEDOT:PSS) interlayer electrodes and the archetypal benzenethiol molecules. In this study, we investigated two different benzenethiol molecules: 4-methylbenzenethiol (MBT) and 1,4-benzenedithiol (BDT), which have the identical backbone structure but different top end-groups. The charge transport through the molecular junctions was dominated by distinct interfacial contact properties between the PEDOT:PSS electrodes and the component molecules. We also observed that the electrical characteristics of the MBT junctions are influenced by the PEDOT grain size, particularly depending on the annealing temperature.

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