3D Arrangement of Magnetic Particles in Thin Polymer Films Assisted by Magnetically Patterned Exchange Bias Layer Systems

The possibility to arrange and embed magnetic micro- nanoparticles in thin polymer film systems using flat magnetically patterned substrate templates is investigated. In contrast self-organized particle rows forming by applying a homogeneous field, particles adapt the field landscape of substrate's pattern prior crosslinking. Crosslinking then fixes positions polymer. process tested for composites hydrophobic polydimethylsiloxane (PDMS) maghemite as well hydrophilic polyvinyl alcohol (PVOH) functionalized, superparamagnetic core–shell microspheres. template an exchange bias layer system into parallel-stripe domains with in-plane magnetizations head-to-head/tail-to-tail remanent magnetization orientation adjacent domains. A high occupancy percentage beads on domain wall anisotropic actuation composite achieved.