... of samples S1 (a), S2 (b) and S3 (c).Fig. 2. Raman spectra of samples S2 (a) and S3 (b).can be exclusively indexed to ␣-Fe2O3, according to standarddata (JCPDS 3 3-0 664). In Fig. 1(b) and ... Wang, Li, Xu, and Zhou (2006), and Shen etal. (2004) used porous anodic aluminium oxide (AAO) as tem-plate to prepare Fe3O4 and ␣-Fe2O3nanotube arrays; Sun etal. (2005) used carbon nanotubes ... attention because of their promising properties and appli-cations. Many iron oxide particles with zero-, one-, two- and three-dimensional (0D, 1D, 2D and 3D) nanostructures havebeen synthesized....