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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 29: Colloids and Complex Liquids I

CPP 29.3: Vortrag

Mittwoch, 2. April 2014, 10:00–10:15, ZEU 114

Self-assembly of colloids driven by disclinations in a nematic host fluid — •Marco G. Mazza¹, Michael Melle², Sergej Schlotthauer², and Martin Schoen^2,3 — ¹MPI-DS, Göttingen, Germany — ²TU Berlin, Berlin, Germany — ³NCSU, Raleigh NC, USA

We present Monte Carlo simulations of a pair of colloidal particles immersed in a nematic host fluid. Through a calculation of the local director field we show that a pair of homogeneous colloids with locally planar anchoring surfaces attract each other if their center-of-mass distance vector forms an angle θ≃30^∘ with the far-field director. We ascribe this attraction to a change in the complex three-dimensional defect structure building around the colloids and changing as the angle varies. This result settles a long-standing discrepancy between theory and experiment.