FABRICATION OF POROUS ANODIC ALUMINIUM OXIDE TEMPLATE BY PHOSPHOROUS ACID ANODIZING, AND ANODIC ALUMINIUM OXIDE TEMPLATE FABRICATED THERBY

摘要

The present invention relates to a method for manufacturing an anodized alumina film by using phosphorous acid as the anodizing electrolytic solution, and an anodized alumina film having large nanopores manufactured thereby. More specifically, the method comprises: a step of preparing an aluminum substrate; a primary anodizing step of immersing and anodizing the aluminum substrate in a phosphorous acid solution to form a first anodized alumina on the surface of the aluminum substrate; a primary etching step of removing the first anodized alumina formed on the surface of the aluminum substrate by a chemical etching method; a secondary anodizing step of immersing and anodizing the aluminum substrate from which the first anodized alumina is removed in the phosphorous solution to form a second anodized alumina; and a secondary etching step of removing aluminum other than the second anodized alumina formed on the surface of the aluminum substrate by a chemical etching method, thereby manufacturing an anodized alumina film, wherein the anodized alumina film has regular nanopores of 100 to 200 nm.