This title appears in the Scientific Report : 2011 

Control Molecule-based Transport for Future Molecular Devices
Karthäuser, S.
Elektronische Materialien; PGI-7
JARA-FIT; JARA-FIT
Journal of physics / Condensed matter, 23 (2011) S. 013001
Bristol IOP Publ. 2011
013001
10.1088/0953-8984/23/1/013001
21406815
Journal Article
Grundlagen für zukünftige Informationstechnologien
Journal of Physics: Condensed Matter 23
J
Please use the identifier: http://dx.doi.org/10.1088/0953-8984/23/1/013001 in citations.
In this review, possibilities to modify intentionally the electronic transport properties of metal/molecule/metal devices (MMM devices) are discussed. Here especially the influence of the metal work function, the metal-molecule interface, the molecule dipole and different tunneling mechanisms are considered. A route to evaluate the effective surface work function of metal-molecule systems is given and, based on experimental results, an exemplary estimation is performed. The electron transport across different metal-molecule interfaces is characterized by relating transmission coefficients extracted from experimentally derived molecular conductances, decay constants or tunneling barrier heights. Based on the reported results the tunneling decay constant can be assumed to be suitable to characterize intrinsic molecular electron transport properties, while the nature of the metal-molecule contacts is properly described by the transmission coefficient. A clear gradation of transmission efficiencies of metal-anchoring group combinations can be given.