Regensburg 2007 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 3: Colloids and Nanoparticles I: Structure

CPP 3.2: Vortrag

Montag, 26. März 2007, 10:15–10:30, H47

Scattering by Self-Affine Fractals — •Gerald Johannes Schneider and Dietmar Göritz — Institut für Physik, Universität Regensburg, 93040 Regensburg

The structure, i. e. the size and the shape, of colloidsized objects at a length scale of nanometers is of fundamental interest for elementary science and for applications. Due to its statistical relevance and its easy appliance scattering methods are very suitable to study the structure of samples at the nanoscale. However, the information content obtained, strongly relies on models of the structure.

Generally, in order to model colloidal objects, the clusters are considered as spherically symmetric. Although, this assumption simplifies the underlying mathematics, it does not work if external forces acting on the sample and thus the experimental results could not interpreted within standard theories.

In our contribution we introduce a new model, based only on the mathematical framework of self affine fractals, which is able to describe the scattering experiment on both isotropic and anisotropic clusters.