Dresden 2014 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 9: Crystallization, Nucleation and Self Assembly II
CPP 9.1: Hauptvortrag
Montag, 31. März 2014, 15:00–15:30, ZEU 260
Self-assembly of soft colloids into meso-, para-, and quasicrystals — •Stephan Foerster1, Alexander Exner1, Sabine Rosenfeldt1, Peter Lindner2, and Jan Perlich3 — 1Physikalische Chemie I, Universität Bayreuth, Germany — 2Institut Laue Langevin (ILL), Grenoble, France — 3HASYLAB/DESY, Hamburg, Germany
Soft colloids interact via soft potentials and often are internally structured. At high volume fractions this leads to the formation of mesocrystals, paracrystals and quasicrystals. [1,2] We show how multibody interactions, multiple length scales and defects decisively control self-assembly at high volume fractions. Neutron- and synchrotron X-ray diffraction are used to reveal the formation of these structures in-situ.
References: [1] S. Fischer, A. Exner, K. Zielske, J. Perlich, S. Deloudi, W. Steurer, P. Lindner, S. Förster, Colloidal quasicrystals with 12-fold and 18-fold diffraction symmetry, Proc. Natl. Acad. Sci. 108 (2011) 1810. [2] A. Exner, S. Rosenfeldt, S. Fischer, P. Lindner, S. Förster, Defect accomodation in nanostructured soft crystals, Nanoscale 2013, in press