In situ synthesis and magnetic anisotropy of ferromagnetic buckypaper

Ferromagnetic buckypaper of carbon nanotubes filled with Fe nanowires (Fe-CNT) was in situ synthesized without using any surfactants or acid treatment. As-synthesized Fe-CNT buckypaper shows strong anisotropic behavior, which can be attributed to the different response of Fe-nanowires inside carbon nanotubes with high aspect ratio in different applied magnetic field.