Template-based sputtering method for vertically aligned Tin nanotube arrays: From fabrication to superconductivity

Large-scale Tin (Sn) nanotube arrays have been fabricated using template-based sputtering method. By controlling the growth temperature, two kinds of Sn films with either cross-linked or isolated nanotube arrays can be prepared after removal of anodic alumina oxide film. Morphology-dependent superconducting properties and pinning effect of magnetic flux were observed. The magnetic property of the isolated Sn nanotube arrays is similar to the single-crystal Sn nanowires while cross-linked Sn naotube arrays exhibit a typical magnetic property of hard superconductor. This method could provide a low-cost and convenient approach to the fabrication of large-scale ordered metal nanostructures with desirable function.