J. Am. Chem. Soc., Article ASAP

Shape Discrimination with Hexapole−Dipole Interactions in Magic Angle Spinning Colloidal Magnetic Resonance

Pietro Tierno*†, Steffen Schreiber‡, Walter Zimmermann‡ and Thomas M. Fischer‡

Abstract
We have studied the interactions between magnetically driven, DNA-linked anisotropic and isotropic colloidal rotors interacting via induced magnetic dipolar and multipolar forces. We show that a balance between magnetic dipole−dipole and dipole−hexapole interactions near the magic angle allows discrimination between spherical and anisotropic magnetic colloidal rotors.