Regensburg 2004 – scientific programme

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CPP: Chemische Physik und Polymerphysik

CPP 9: Single Molecule Spectroscopy

CPP 9.5: Talk

Monday, March 8, 2004, 15:00–15:15, H 38

Single Molecule Microscopy of Aligned Molecules in a Thin Crystalline Film — •Robert Pfab, Jan Zimmermann, Christian Hettich, Ilja Gerhardt, Alois Renn, and Vahid Sandoghdar — Physical Chemistry Laboratory, Swiss Federal Institute of Technology (ETH), CH-8093 Zurich, Switzerland

Thin films of terrylene doped para-terphenyl have been fabricated and characterised with optical microscopy, AFM measurements and single molecule microscopy. Individual terrylene molecules are found to be aligned with their transition dipole moment perpendicular to the plane of the film, as observed by their characteristic dipole emission patterns. The fluorophores are shown to be extremely photochemically stable. The homogeneity of the film makes such samples ideal for scanning probe microscopy techniques, and the orientation of the molecules provide a well defined system for studying dipole-dipole interactions.