Transport molecular wires

Fig. 11 IETS analysis of transport through an etheric naphthalene molecular wire. Central panel left shows the computed (red) and the experimental (black) IETS spectrum. The normal...

Ballmann S, Hieringer W, Seeker D, Zheng Q, Gladysz JA, Gorling A, Weber HB (2010) Molecular wires in single-molecule junctions charge transport and vibrational excitations. ChemPhysChem 11(10) 2256-2260... 

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Blum AS, Kushmerick JG, Pollack SK, Yang JC, Moore M, Naciri J, Shashidhar R, Ratna BR (2004) Charge transport and scaling in molecular wires. J Phys Chem B 108 (47) 18124—18128... 

Burtman V, Ndobe AS, Vardeny ZV (2005) Transport studies of isolated molecular wires in self-assembled monolayer devices. J Appl Phys 98(3) 034314-034319... 

Emberly EG, Kirczenow G (2002) Molecular spintronics spin-dependent electron transport in molecular wires. Chem Phys 281 (2—3) 311—324... 

Yaliraki SN, Ratner MA (1998) Molecule-interface coupling effects on electronic transport in molecular wires. J Chem Phys 109(12) 5036-5043... 

Weiss EA, Ahrens MJ, Sinks LE, Gusev AV, Ratner MA, Wasielewski MR (2004) Making a molecular wire charge and spin transport through para-phenylene oligomers. J Am Chem Soc 126(17) 5577-5584... 

Widawsky JR, Kamenetska M, Klare J, Nuckolls C, Steigerwald ML, Hybertsen MS, Venkataraman L (2009) Measurement of voltage-dependent electronic transport across amine-linked single-molecular-wire junctions. Nanotechnology 20 434009... 

Remade F, Levine RD (2006) Electrical transport in saturated and conjugated molecular wires. Faraday Discuss 131 45... 

It is useful to introduce a nomenclature for distinguishing between ET occurring by the conduction and superexchange mechanisms. The term electron transport is used in the context of molecular wire behavior, while electron transfer is used in the context of the superexchange mechanism. 

Fig. 1. Two limiting cases for transport. The upper figure represents the scanning tunneling microscope limit, where the molecular stmcture coupling to the electrode is much stronger than that to the scanning tip. The lower figure shows the molecular wire junction, where the interactions with the two electrodes are comparable in magnitude.

Prins P, Grozema FC, Siebbeles LDA (2006) Efficient charge transport along phenylene-vinylene molecular wires. J Phys Chem B 110 14659... 

Therefore, if one indeed wants to use DNA as an electrical molecular wire in nanodevices, or as a model system for studying electrical transport in a single one-dimensional molecular wire, then there are a few possible options. One option is to use doping by one of the methods that are described... 

A. Nitzan and M. A. Ratner, Electron transport in molecular wire junctions, Science 300, 1384—1389 (2003). 

Models describing the transport of electrons in molecular junctions have been shown to be quite powerful. Here the emphasis was put on time-dependent effects which can, for example, be triggered by external laser fields. If these fields are strong, a non-perturbative treatment of the laser-matter interaction is of large importance and is included in the presented TL QME. Also the connection of transport through molecular wires or coherent laser control scenarios may play an important role in the future. 

In contrast, a new type of redox polymer-coated electrode has recently been fabricated using the bottom-up method, in which redox-active molecules are connected with molecular wires, and the wires act as the current collector.11-13 In this case, electrons can be transported through the wires, and control of the electron transfer pathway is possible by changing the structure of the molecular wires. If the wire has a linear structure, redox active molecules with the wire connections exhibit a structure similar to that of a beaded curtain (Fig. lb), in which the electron transfers in a straightforward manner along each line. Furthermore, when the wire is composed of redox active molecules, we observe the promising phenomenon that the electron transfers via the redox process in the wire, whose mechanism would... 

B. Electron Transport Behavior of the Molecular Wires on the Electrode... 

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