Patent ID: 9469526
Filing Date: 2016-10-18
CPC Classification: B81B,B81C,Y10T

Claim Text:
1. A method for creating conical nanostructures on a substrate surface, comprising: a) providing the substrate surface covered with nanoparticles; b) etching the substrate surface covered with nanoparticles to a depth of at least 100 nm, wherein the nanoparticles act as etching mask and the etching parameters are set in such a manner that hyperboloid structures arise below the nanoparticles, wherein each of the hyperboloid structures has a shape of a hyperboloid of revolution of one sheet with a region of a smallest diameter approximately halfway up the hyperboloid structures from the substrate surface; and c) breaking the hyperboloid structures in the region of the smallest diameter by exerting mechanical forces, wherein the structures remaining on the substrate surface have a conical shape which essentially corresponds to half of the hyperboloid of revolution of one sheet.