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Abstract

A method of manufacturing nanostructures on a surface of a metal substrate is provided. The method includes forming the nanostructures by a forming step, which includes subsequently performing at least once the steps of anodizing the surface at a second voltage for forming at the surface a second oxidized metal layer comprising second pores, and performing an etching step on the surface for modifying the dimensions of the second pores. Prior to the forming step, the method comprises a substrate preparation step for enabling the forming a mix of different sized nanostructures during the forming step, the preparation step including the steps of anodizing the surface at a first voltage for forming at the surface an first oxidized metal layer comprising first pores, selectively etching the surface for extending the first pores into the metal underneath the first oxidized metal layer, and removing the first oxidized metal layer.

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