Polyelectrolyte stabilized nanowires from Fe ₃O ₄ nanoparticles via magnetic field induced self-assembly

An experiment that uses magnetic field for the fabrication of polyelectrolyte stabilized nanowires from Fe ₃O ₄ nanoparticles, is descrobed. Self-assembled block copolymer morphologies were used to prepare superlattices of nanoparticles, and single polyelectrolyte molecules were templated with metal nanoparticles. Reversible formation of ID structures for paramagnetic particles induced by magnetic field has been used to tune properties of magnetorheological fluids. Magnetization of hysteresis of the aligned nanowires was measured, and was found that the coercive force fields show differences when the magnetic field during the measurement was parallel and perpendicular to the patterns.