Magnetic field induced self-assembly of gas phase prepared FePt nanoparticles.
FePt nanoparticles, which are synthesized and thermally annealed in the gas phase, were deposited onto silicon substrates, which are pre-coated with multilayers of amphiphilic phospholipids. If the lateral mol. mobility of these lipid mols. is sufficiently high, a lipid monolayer is formed around individual nanoparticles. At the same time, the mol. mobility of the multilayers allows for self-assembly of the particles in regular two-dimensional arrangements. Particle deposition onto lipid multilayers in the intermediate phase followed by the implementation of a homogeneous magnetic field perpendicular to the multilayer results in two-dimensional hexagonal particle patterns of high symmetry.
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