Charge Transport through Molecular Junctions

MRS Bulletin ◽  
2004 ◽  
Vol 29 (6) ◽  
pp. 385-390 ◽  
Author(s):  
M.C. Hersam ◽  
R.G. Reifenberger
Keyword(s):  
Charge Transfer ◽  
Solid State ◽  
Charge Transport ◽  
Molecular Electronics ◽  
Resonant Tunneling ◽  
Dominant Role ◽  
Electronic Devices ◽  
Molecular Electronic ◽  
Electron Stimulated Desorption ◽  
Interface Effects

AbstractIn conventional solid-state electronic devices, junctions and interfaces play a significant if not dominant role in controlling charge transport. Although the emerging field of molecular electronics often focuses on the properties of the molecule in the design and understanding of device behavior, the effects of interfaces and junctions are often of comparable importance. This article explores recent work in the study of metal–molecule–metal and semiconductor–molecule–metal junctions. Specific issues include the mixing of discrete molecular levels with the metal continuum, charge transfer between molecules and semiconductors, electron-stimulated desorption, and resonant tunneling. By acknowledging the consequences of junction/interface effects, realistic prospects and limitations can be identified for molecular electronic devices.

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.

Electrochemical Testing of Potential Molecular Devices

2000 ◽  
Vol 636 ◽  
Author(s):  
David W. Price ◽  
Shawn M. Dirk ◽  
Adam M. Rawlett ◽  
Jia Chen ◽  
W. Wang ◽  
...  
Keyword(s):  
Cyclic Voltammetry ◽  
Solid State ◽  
Electronic Devices ◽  
Molecular Devices ◽  
Molecular Electronic ◽  
Reduction Potentials ◽  
Electrochemical Testing ◽  
Absolute Reduction ◽  
Molecular Scale ◽  
Molecular Electronic Devices

AbstractCyclic voltammetry (CV) was used to study the reduction potentials of 2,5-di(ethynylphenyl)-4-nitroaniline and 2,5-di(ethynylphenyl)nitrobenzene. Although no absolute reduction potentials can be used in the correlation between solution (CV) and solid state (nanopore) embodiments, each CV plot showed two reductions. The first and second reduction might correspond to switching events of recently reported molecular electronic devices in a nanopore. Cyclic voltammetry results are also reported for other potential molecular scale electronic devices.

Molecular Electronics: From Basic Chemical Principles to Photosynthesis to Steady-State Through-Molecule Conductivity to Computer Architectures

2004 ◽  
Vol 57 (12) ◽  
pp. 1133 ◽  
Author(s):  
Jeffrey R. Reimers ◽  
Ante Bilić ◽  
Zheng-Li Cai ◽  
Mats Dahlbom ◽  
Nicholas A. Lambropoulos ◽  
...  
Keyword(s):  
Molecular Dynamics ◽  
Steady State ◽  
Carbon Nanotube ◽  
Molecular Electronics ◽  
Electronic Devices ◽  
Spectroscopic Properties ◽  
Computer Architectures ◽  
Ab Initio Molecular Dynamics ◽  
Molecular Electronic ◽  
Basic Ideas

Molecular electronics offers many possibilities for the development of electronic devices beyond the limit of silicon technology. Its basic ideas and history are reviewed, and a central aspect of the delocalization of electrons across molecules and junctions is examined. Analogies between key processes affecting steady-state through-molecule conduction and equilibrium geometric and spectroscopic properties of paradigm molecules, such as hydrogen, ammonia, benzene, and the Creutz–Taube ion are drawn, and the mechanisms by which control can be exerted over molecular-electronic processes during biological photosynthesis are examined. Ab initio molecular dynamics and simulations of conductivity are then presented for carbon nanotube flanged to gold(111), and device characteristics are calculated for a molecular shift register clocked by two gold electrodes.

Electrochemical Testing of Potential Molecular Devices

2000 ◽  
Vol 660 ◽  
Author(s):  
David W. Price ◽  
Shawn M. Dirk ◽  
Adam M. Rawlett ◽  
Jia Chen ◽  
W. Wang ◽  
...  
Keyword(s):  
Cyclic Voltammetry ◽  
Solid State ◽  
Electronic Devices ◽  
Molecular Devices ◽  
Molecular Electronic ◽  
Reduction Potentials ◽  
Electrochemical Testing ◽  
Absolute Reduction ◽  
Molecular Scale ◽  
Molecular Electronic Devices

ABSTRACTCyclic voltammetry (CV) was used to study the reduction potentials of 2,5- di(ethynylphenyl)-4-nitroaniline and 2,5-di(ethynylphenyl)nitrobenzene. Although no absolute reduction potentials can be used in the correlation between solution (CV) and solid state (nanopore) embodiments, each CV plot showed two reductions. The first and second reduction might correspond to switching events of recently reported molecular electronic devices in a nanopore. Cyclic voltammetry results are also reported for other potential molecular scale electronic devices.

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