Berlin 2005 – wissenschaftliches Programm

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SYRN: From quantisation in the gravitational field to correlated electron systems - Perspectives of research with neutrons

SYRN 1: Perspectives of research with neutrons

SYRN 1.2: Hauptvortrag

Dienstag, 8. März 2005, 14:30–15:00, TU HE101

Soft Matter Science — •Richter Dieter — Institut für Festkörperforschung, Forschungszentrum Jülich, D-52425 Jülich, Germany

The lecture commences with an introduction into soft matter science and the role of neutron scattering in this field. Thereafter some examples for outstanding neutron results on key problems in soft matter science will be given.

(i) We will examine neutron spin echo results addressing the molecular dynamics of polymer chains in the melt, elucidating the role of entropic forces and topological confinement: two key elements in the dynamics of complex soft matter systems.

(ii) Real time kinetic neutron studies on transient phenomena in soft matter gain in importance. We will address a combined high resolution NMR and neutron small angle scattering study on the relation between chemical reaction kinetics and structure formation in anionic polymerisation.

(iii) Relevant systems in soft matter are often multicomponent materials, where key components at low concentrations determine the properties. As an example we will consider amphiphilic polymers which boost the emulsification efficiency of surfactants in microemulsions.

(iv) Finally, selforganisation is one of the key phenomena in soft materials. We will look on selfassembling polymers which winterize Diesel fuel as well on proteins which inhibit the calcification in soft tissue of mammals.