M. A. Rampi: "Controlling and Gating Current Flowing through Large Area Metal-molecules-Metal Junctions: from tunneling to hopping mechanisms"
| Wann |
31.05.2010 von 11:15 bis 12:00 |
|---|---|
| Wo | FRIAS Seminarraum, Albertstraße 19 |
| Name | Britta Küst |
| Kontakttelefon | +49 (0)761 203 97418 |
| Teilnehmer |
Open to University employees |
| Termin übernehmen |
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Prof. M.A. Rampi
Chemistry, University of Ferrara, and Chemistry and Chemical Biology, Harvard University
Controlling and Gating Current Flowing through Large Area Metal-molecules-Metal Junctions: from tunneling to hopping mechanisms
By using a junction, Au-SAM//Hg, based on Au and Hg electrodes, molecules of increas-ing complexity organized in self assembled monolayers (SAMs) on a Au surface can be easily contacted by a Hg drop as second electrode. Examples are given to control the current flowing through the junction.
- A new generation of molecular wires, assembled in tuneable lengths by stepwise coor-dination can be (up to 40 nm), show a long sought electrical behaviour which is domi-nated by an ohmic regime.
- By using a semitransparent Au gold surface, SAMs formed by a rigid azobenzene-based compound can be irradiated when trapped inside the junction. The cooperative photoinduced molecular movements generate a system that acts as a light triggered cargo lifter.
