Synthesis Of One-Dimensional Metal Nanomaterials By AAO Template-Assisted Electrodeposition

We have successfully prepared a. large area, High filling rate and dense metal Co, Pd and Fe-Pd alloy nanowires and nanotubes by using porous anodic aluminum oxide (AAO) template assisted traditional electrochemical deposition technology. A new type of home-made electrochemical cell was employed which is simple, easily controlled. A more systematic research was done about the electrodeposition process parameters and metal nanotube mechanism for the growth. Electrodeposition results show that under the condition of pulse power the growth of metal nanomaterials is uniform and 100% filling rate and the surface of the deposits are very good. XRD results show that the cathodic current density has influence on the structure of metal nanomaterials. For Co nanomaterials, when increasing the current density, the structure changes from hcp and fcc composite to absolute hcp. For Fe-Pd alloy nanomaterials, in low current density it is fcc structure and in high current density it is bcc structure. Also, we have discussed the influence of cathodic current density on the morphology of metal nanomaterials. With the increasing of cathode current density the electrodeposition product gradually changes from nanowires to nanotubes, while the Pd atomic percentage in Fe-Pd alloy decreases. Heating treatment can convert the metastable Fe-Pd alloy nanotubes into a superlattice structure of the balance. Magnetic studies show that one-dimensional metal Co and Fe-Pd alloy nanomaterials have good soft magnetic properties, which are applicable for the magnetic memory recording and sensors.