Basic Properties of Magnetic Fluids Containing Silver Nano-wires

Abstract

Magnetic fluids are stable suspensions of ferromagnetic particles in a solvent such as water and kerosene. In the presence of magnetic field, it is well known that ferromagnetic particles form chain-like clusters in the field direction. When chain-like clusters of the ferromagnetic particles are formed in the fluid, anisotropic properties of thermal conductivity appear. From the visualization experiment using a microscope, it was found that a silver nanowire in the magnetic fluid orients its axial direction in the direction of the magnetic field in the presence of uniform magnetic field. It was also found that by adding silver nanowires to the magnetic fluid, it is possible to enhance the thermal conduction anisotropy caused by applying the magnetic field.