| abstract |
An object of the present invention is to remove visible visible scratches on high-purity aluminum and make it into a mirror state, and then anodize it to improve the flatness of the surface of the anodized nanostructure, making it easy to process optical devices and magnetism. Provided is a manufacturing method that can be applied to an electromagnetic device such as a device and can obtain a regular structure with a large area. An aluminum substrate having a purity of 99.9% or more is at least mechanically polished to have an arithmetic average roughness Ra of 0.1 μm or less and a surface glossiness of 60% or more, and further anodized. A method for producing a nanostructure on a surface. [Selection figure] None |