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CPP: Chemische Physik und Polymerphysik

CPP 12: Colloids and Nanoparticles II

CPP 12.1: Vortrag

Montag, 8. März 2004, 15:45–16:00, H 39

SOLVENT-DEPENDENT CRYSTALLIZATION KINETICS OF COLLOIDAL PARTICLES — •Roy Goldberg, Patrick Wette und Thomas Palberg — Johannes Gutenberg-University Mainz, Institute of Physics, Staudingerweg 7, D-55099 Mainz

For structural examinations of crystalline ordered particles and to avoid aging (Ostwald-ripening) and later coagulation it is advantageous that the crystals are kept in their original state. For this reason they will be imbedded in polymer matrices.

By static light scattering we examined in which way the particle-interaction in a monomer-solution compared to aquatic dispersions with the same particle number density will change. Beside the investigation of structural parameters, the determination and comparison of crystallite sizes is possible and variations in the particle-interaction are thus directly observable . Additionally, changes in lattice features of colloidal crystals during imbedding in a polymer matrix and with further drying were investigated with microscopical methods as atomic-force-microscopy and electron-microscopy.