The presentation will focus on the synthesis and characterization of
molecular assemblies, based on transition metal complexes and
electronically conducting polymers, of deliberate design, for
application in molecular devices. We have prepared and characterized
single-molecule devices incorporating transition metal complexes
designed so that electron transport occurs through well-defined charge
states of a single molecule. We have examined two related molecules
containing a Co ion bonded to polypyridyl ligands, attached to
insulating tethers of different lengths. Changing the length of the
insulating tether alters the coupling of the ion to the electrodes,
enabling the fabrication of devices that exhibit either Coulomb Blockade
or the Kondo effect. The use of more complex molecular architectures as
well as of electronically conducting polymers will also be discussed.
H. D. Abruña, D. Ralph, P. McEuen, J. P. Sethna,
J. Park, A. Pasupathy, J. Goldsmith, C. Chang, Y. Yaish, J. R. Petta, M. Rinkoski, Stefan Bernhard, B. Ulgut, J. Grose Dept. of Chemistry & Chem. Biology, Dept. of Physics Cornell University, Ithaca, New York 14853
Université de Cornell