Parts | Days | Selection | Search | Downloads | Help
CPP: Fachverband Chemische Physik und Polymerphysik
CPP 3: Focus: Structure and Dynamics of Responsive Hydrogels I
CPP 3.3: Talk
Monday, March 22, 2010, 11:00–11:15, H37
Salty Microgels – Smart Microgels in Presence of the Hofmeister Series — •Michael Zeiser1,2, Yvonne Hertle1,2, Peter Busch3, and Thomas Hellweg1,2 — 1University of Bayreuth, 95440 Bayreuth, Germany — 2Bayreuth Center for Colloids and Interfaces, 95440 Bayreuth, Germany — 3Jülich Center for Neutron Science, Forschungs-Neutronenquelle Heinz Maier-Leibnitz, 85747 Garching, Germany
The nature of individual ion properties, so called Hofmeister effects, play a significant role within natural mechanisms. Foaming of ocean water, secondary effects on protein structures and crystallization are just few examples among many.
Smart microgels are networks of colloidal size which are able to respond to external stimuli, such as temperature, by a change in their colloidal dimension. At a certain critical value the particles undergo a volume phase transition. Tuning this volume phase transition can be implemented by changing the chemical composition, solvent etc.. In this study we explored the influence of certain ions on two different thermoresponsive microgel systems. We probed structures and dynamics on different lengthscales by the usage of different light scattering techniques and small angle neutron scattering.