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Physical Chemistry

Lund University

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Phase behavior, dynamics and directed self-assembly of anisotropic model colloids

Here we aim at a fundamental understanding of the phase behavior, structure and dynamics of concentrated suspensions of anisotropic particles. We focus both on structural anisotropy in ellipsoidal particles, as well as on the effects of an additional anisotropic component in the interaction potential between particles that can be generated using magnetic particles or particles with a magnetic core, or with an external alternating electrical field. 

We investigate the structural and dynamic properties of magnetic ellipsoidal particles in the presence of an external magnetic field using a combination of small-angle x-ray scattering, differential dynamic microscopy and magnetometry. We compare the experimental results with those obtained by computer simulations.

We also study the effect of particle anisotropy and external polarizing electrical fields with soft ellipsoidal core-shell microgel particles using a combination of confocal laser scanning microscopy and computer simulations.

 

People: Jérôme J. Crassous, Thiago Ito, Adriana Mihut, Antara Pal, Per Linse, Joakim Stenhammar, Erik Wernersson, Ann Hirt (ETH Zurich, Switzerland), Vincent Martinez and Wilson Poon (University of Edinburgh, UK), Jan Vermant (ETH Zurich, Switzerland), Peter Schurtenberger.

Contact person: Peter Schurtenberger