Parts | Days | Selection | Search | Downloads | Help
O: Fachverband Oberflächenphysik
O 40: Methods: Scanning probe techniques I
O 40.9: Talk
Wednesday, March 25, 2009, 17:00–17:15, SCH A316
Plasmon enhanced luminescence from fullerene molecules using a scanning tunneling microscope — •Frédéric Rossel, Marina Pivetta, François Patthey, and Wolf-Dieter Schneider — Ecole Polytechnique Fédérale de Lausanne (EPFL), Institut de Physique des Nanostructures, CH-1015 Lausanne, Switzerland
Luminescence from supported C60 and C70 molecules induced by tunneling electrons in a scanning tunneling microscope (STM) has been observed. The fullerene nanocrystals were electronically decoupled from the Au(111) substrate by an ultrathin NaCl film. Intramolecular fluorescence and phosphorescence associated with the transitions between the lowest electronic excited state and the ground state of C70 molecules were identified, demonstrating the capability of this technique for chemical recognition on the nanometre scale. Moreover we show that the molecular luminescence is selectively enhanced in the STM tip-sample gap by localized surface plasmons excited in an inelastic electron tunneling process.
We acknowledge financial support of the Swiss National Science Foundation.