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Metal Sn nanobelts have been fabricated by a substitution reaction using pure Zn powders and SnO2 nanopowders as starting material. The morphology and structural properties of Sn nanobelts were measured by scanning electron microscopy and high-resolution transmission electron microscopy. The products consist of a large number of beltlike nanostructures with typical lengths in the range of several tens to several hundreds of micrometres and the typical widths of Sn nanobelts are in the range of several tens to several hundreds of nanometres. Sn nanobelts are pure, structurally uniform, and single crystalline. The synthesis of single-crystalline metal Sn nanobelts may open up new possibilities for experimental and theoretical understanding of dimensionally confined transport phenomena of quasi-one-dimensional metal nanomaterials.

Cobalt ferrite nanotubes with diameter of 50 nm were prepared using a simple sol–gel process within the pores of anodic aluminum oxide (AAO) template. SEM, TEM, XRD, VSM were used to characterize the morphology, crystalloid structure, and magnetic properties of the samples. The results indicate that the cobalt ferrites thus prepared were polycrystalline phase with the smooth and uniform tube-like structure. The method is also expected to be applicable to the preparation of other multicomponent oxide nanotubes.