Creation of water-repellent surfaces using Self-Assembled Monolayer

Abstract

In this study, we created a surface that imitated lotus leaves, and clarified whether improvement of water repellency is obtained by the hierarchical structure of lotus leaf surface .To imitate, a surface was prepared by subjecting the Si surface to patterning by dry etching using DeepRIE and aligning the cylinder on a hexagonal lattice.A surface having a diameter and a pitch changed by 10 μm to 150 μm at the minimum of 40 μm was prepared for the produced cylinder .This surface was immersed in PS solution to decorate the surface with PS.Results The average contact angle was 138.3 °, which is an improvement in the contact angle of about 8 ° compared to the surface on which only PS was formed.