Dresden 2014 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 36: Posters: Bio/organic Molecules on Surfaces, Graphene, Solid/liquid interfaces, Metal Substrates, Electronic Structure Theory
O 36.22: Poster
Dienstag, 1. April 2014, 18:30–22:00, P1
Structure and Fluorescence of Molecular Crystals — Björn Vogler1, Hannes Hartmann1, Kai Wardelmann1, Heinrich Behle1, J.A.A.W. Elemans2, Ingo Barke1, and •Sylvia Speller1 — 1University of Rostock, Institute of Physics, 18051 Rostock, Germany — 2Institute for Molecules and Materials, RU Nijmegen, NL
We study the influence of the local environment on the excitation and transport of Frenkel excitons in molecule crystals. Metallo-porphyrin aggregates [1] are prepared by dropcasting on graphite. We use AFM, STM, and Fluorescence Microscopy to study morphology and the spatial distribution of fluorescence. The mesoscopic structure shows molecular strands branching into finer structures. The fluorescence intensity is spatially varying along the strands and appears enhanced at junctions. We discuss possible origins for the observed variations.
[1] M.J.J. Coenen, et al., Phys. Chem. Chem. Phys. 15, 12451 (2013)