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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 20: Focus: Magnetic Soft Matter II

CPP 20.7: Talk

Wednesday, March 25, 2009, 11:45–12:00, ZEU 222

Shape Discrimination with Hexapole Dipole Interactions in Magic Angle Spinning Colloidal Magnetic Resonance. — Pietro Tierno¹, Steffen Schreiber², Walter Zimmermann², and •Thomas Fischer² — ¹University of Barcelona — ²University of Bayreuth

We study the interactions between magnetically driven anisotropic and isotropic colloidal rotors interacting via induced magnetic dipolar and multipolar forces in a precessing magnetic field. Close to the magic precession angle dipole dipole interactions between the rotors can be tuned such that shape sensitive higher multipole moments allow to assemble originally spherical rotors into clusters of defined shape and size.