A simple electrochemical method, which involves the use of anodic alumina membranes (AAMs) as the template, was used to synthesize vertically aligned Fe nanotubes. It is shown that the thickness of the Au cathode electrode on the AAM and the use of a direct electrodeposition technique are the two key factors to realize Fe nanotubes. It is noted that the wall thickness of the Fe nanotubes can be preciously controlled by the deposition time and the nanotubes can change to nanowires as the deposition time prolongs. Magnetic and thermal expansion properties of both Fe nanotubes and nanowires are studied and compared. It is found that the Fe nanotubes have a large coercive force and are physically robust to the change in temperature as compared with Fe nanowires.
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Physical and Theoretical Chemistry
- Surfaces, Coatings and Films