Dresden 2006 – wissenschaftliches Programm
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CPP: Chemische Physik und Polymerphysik
CPP 2: Colloids and Nanoparticles
CPP 2.1: Vortrag
Montag, 27. März 2006, 10:00–10:15, ZEU 160
Self organization of micelles at solid-liquid interfaces — •Max Wolff1,2, Marco Walz3, Andreas Magerl3, and Hartmut Zabel1 — 1Lehrstuhl für Festkörperphysik, Ruhr-Universität Bochum, Bochum, Germany — 2Institut Laue-Langevin, Grenoble, France — 3Lehrstuhl für Kristallographie und Strukturphysik, Universität Erlangen-Nürnberg, Erlangen, Germany
Self organizing systems are known to open new possibilities in nano-patterning of materials.
One interesting aspect is the influence of a solid substrate on ordering in liquids.
To gather in-situ non-destructive information on the not directly accessible solid-liquid interfaces is difficult.
We have demonstrated that by taking advantage of the high penetration power of neutrons and combining neutron reflectivity (NR), off-specular scattering and near-surface small angle scattering (NS-SANS) three dimensional structural information from the µm down to nm regime becomes accessible.
We will demonstrate the importance of the properties of the solid-liquid interface, like the chemical termination, for the crystallization of three block polymer micelles.
Aditionally we will present data exploring the crystallization process for varying temperatures in great detail.
We find a hysteresis not only in the size and formation of crystallites but also in the structure formed during crystallization and reorientation with increasing and decreasing temperatures.
The presented findings from the neutron scattering experiments will be correlated to rheological studies.