One-Step Process To Fabricate Fe Core/Fe−Dimethylsulfoxide Shell Coaxial Nanocables

The coaxial nanocables of Fe/Fe−dimethylsulfoxide (DMSO) were electrodepositied at 40 °C in the solution of DMSO with 17 g/L FeCl 3 . It is the first report about the preparation of nanocables by electrodeposition in a simple one-step process. The Fe−DMSO sheaths are predicted as coordination compounds of [Fe(DMSO) 4 Cl 2 ] and [Fe(DMSO) 3 Cl 3 ] that are amorphous in structure and paramagnetic at room temperature. The Fe cores are bcc structure with a preferred orientation of (110). The morphology of resulting nanostructures can be precisely controlled by varying the concentration of FeCl 3 in DMSO solution and the elelctrodeposited temperature. The walls of Fe−DMSO sheaths are very thin; therefore, the outer diameters of nanocables are nearly the same as the central Fe cores about 40 nm, with an aspect ratio of 100. The arrays exhibit an obvious anisotropy with the easy magnetizing axis along the length of nanocables, which are useful magnetic storage materials.