Regensburg 2007 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 9: POSTER: Colloids and Nanoparticles

CPP 9.4: Poster

Montag, 26. März 2007, 16:00–18:00, Poster B

Influence of a Limited q-range on the Results obtained from Scattering Experiments — •Gerald Johannes Schneider and Dietmar Göritz — Institut für Physik, Universität Regensburg, 93040 Regensburg

Scattering methods are widely used for investigating the structure of colloidsized objects. However, considering hierarchical structures, like e. g. colloidal silica, objects at characteristic length scales ranging from a few Angstrom up to millimeters are involved. Thus, even by combining different scattering techniques, in particular X-ray, neutron, and light scattering methods, a complete information on the structure is not available.

In our contribution we investigate the influence of the limitation of the q-range available. For this purpose, scattering diagrams were calculated to show the influence of the range of the momentum transfer to the radius of the gyration of the object extracted from the scattering curves. We show, if the the minimum value for the momentum transfer is not small enough, the error for the radius of gyration will be very large.