Long continuous FeNi nanowires inside carbon nanotubes: Synthesis, property and application

A novel process for in situ filling of long continuous FeNi nanowires into thin-walled carbon nanotubes (CNTs) is reported, which is achieved by simply using chlorine-contained benzene, C6H3Cl3, as the carbon precursor. The length of FeNi nanowires encapsulated in CNTs is up to ∼4 μm, which is increased by an order of magnitude compared with those of previous reports (lengths <500 nm). Magnetic measurements on the sample show typical ferromagnetic properties with a Curie temperature (Tc) of 640 °C. Theoretical calculations show that this kind of materials is promising and can be used as an effective microwave absorber with a thinner coating layer.