Speaker: Jurgen Rabe, Humboldt University of Berlin, Germany
Department: Electrical Engineering
Location: Engineering Quadrangle B205
Date/Time: Monday, October 15, 2012, 2:30 p.m. - 3:30 p.m.
Nanographenes, i.e. extended molecularly defined polycyclic aromatic hydrocarbons, suitably derivatized at their molecular peripheries, provide robust and highly versatile active components for single-molecule electronics, which have been put to work in an STM configuration at the interface between organic solutions and graphite . Similarly they can be applied onto single and double layer graphenes on insulating substrates such as oxidized silicon, and also fully transparent substrates such as mica, which offers new prospects for single molecule spectroscopy and molecular opto-electronics . Graphenes, on the other hand, may be used as transparent top electrodes for conjugated polymers, where the graphenes serve, on the same time, as protective barriers against oxygen and water, thereby preventing the lifetime limiting photooxidation of the polymer . Deposited onto single macromolecules such as DNA on mica, graphenes allow further to protect them also mechanically against shear forces, e.g. during scanning force microscopy in contact mode , thereby offering new prospects for analytical scanning probe microscopy techniques. Finally, graphene deposited on bare mica provides a novel semihydrophilic slit pore of self-adjustable size, which can be used to study molecular liquids in confined geometries .
 Müllen, K.; Rabe, J.P. Acc. Chem. Res. 2008, 41, 511.
 Eilers, S.; Müllen, K.; Rabe, J.P., et al. in preparation.
 Lange, P.; Dorn, M.; Severin, N.; Vanden Bout, D.A.; Rabe, J.P. J. Phys. Chem. C 2011, 115, 230.
 Severin, N.; Dorn, M.; Kalachev, A.; Rabe, J.P. Nano Lett. 2011, 11, 2436.
 Severin, N.; Lange, P.; Sokolov, I.M.; Rabe, J.P. Nano Lett. 2012, 12, 774.