Berlin 2015 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 28: New Instruments and Methods
CPP 28.2: Vortrag
Dienstag, 17. März 2015, 14:15–14:30, C 264
Combination of 3D-cross correlated light scattering with small-angle neutron scattering: PNIPAM microgel particles as model system — •Annegret Günther1,2, Yvonne Hertle1, Daniel Clemens2, Johannes Bookhold1, Fangfang Chu2, Matthias Ballauff2, and Thomas Hellweg1 — 1Universität Bielefeld, PCIII, Universitätsstr. 25, 33615 Bielefeld — 2Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, EM-ISFM, Hahn-Meitner-Platz 1, 14109 Berlin
The combination of 3D-cross correlation light scattering (3D-LS) with small-angle neutron scattering (SANS) will enable researchers, particularly in the field of soft condensed matter, to perform simultaneously neutron and light scattering experiments on highly concentrated samples. In order to show the applicability of this new setup PNIPAM microgel particles were used as a model system. For this kind of 'smart material' it was shown [1], that these particles in solution are deformed at higher particle concentrations. Since conventional light scattering experiments have to be performed on diluted samples to assure that only single-scattered light is detected, this concentration effect could only be observed by SANS. 3D-LS suppress the multiple scattering by performing two simultaneously light scattering experiments. By combining the 3D-LS with the SANS instrument V16 at the Helmholtz-Zentrum in Berlin, it will be possible to study samples under exact the same conditions for both scattering experiments.
[1] M. Stieger, J. S. Pedersen, P. Lindner and W. Richtering, Langmuir 20, 7283 (2004).