Regensburg 2013 – scientific programme
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 19: Poster: Crystallization, Nucleation and Self Assembly
CPP 19.5: Poster
Tuesday, March 12, 2013, 18:15–20:15, Poster C
MUSIC-mode AFM of self-assembled oligothiophene fibrils — •Martin Feifer1, Eike-Christian Spitzner1, Robert Magerle1, Roman Marty2, and Holger Frauenrath2 — 1Chemische Physik, TU Chemnitz, D-09107 Chemnitz — 2Ecole Polytechnique Fédérale de Lausanne (EPFL), Switzerland
We investigate the structure of self-assembled oligothiophene fibrils, that may be of interest as organic semiconducting nanowires. Spincoated on a substrate, the fibrils are about 26 nm wide and have an average height of 2.9 nm. For analysis we use multi-setpoint intermittent contact (MUSIC) mode atomic force microscopy (AFM), which provides with unprecedented spatial resolution data on the fibrils nanomechanical properties and gives a detailed insight into the inner structure. The fibrils consist of a rigid core from tetrathiophene terminally attached with oligopeptides that form a soft shell. We also present results on different substrates and discuss their influence on the fibril's configuration. Furthermore we compare results using standard AFM tips to high-resolution data, obtained by super sharp AFM tips.