Dresden 2009 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 14: POSTERS Nanoparticles
CPP 14.9: Poster
Dienstag, 24. März 2009, 14:00–16:30, P3
Mechanical properties of self-assembled mesoscale fibers investigated by AFM bending experiments — •Daniel Kluge1, Frank Abraham2, Stephan Schmidt1, Hans-Werner Schmidt2, and Andreas Fery1 — 1Department of Physical Chemistry II, University of Bayreuth, Universitätsstraße 30, 95440 Bayreuth, Germany — 2Department of Macromolecular Chemistry I, University of Bayreuth, Universitätsstraße 30, 95440 Bayreuth, Germany
Fibers with diameters in the range of nm to µm have a large field of applications, mainly for tissue engineering and in composite materials. However, little is known about the mechanical properties of individual fibers on the mesoscale. We used AFM (atomic force microscopy) for force measurements in analogy to a macroscopic 3 point bending test to investigate self-assembled fiber-like structures of aromatic benzene trisamides. These had the ability to form remarkable hexagonal hollow cylinder morphologies. Our results suggest that their elastic modulus is comparable to semi-crystalline polymers. One special feature of our measurements was the usage of the force mapping mode of the AFM. This was a facile way to enhance the reliability of the measurements and collect significant amounts of data at the same time. The extensive data collection of our method marks a good starting point for future modeling and a thorough understanding of single-fiber deformation on the mesoscale.