A Hydrophobic Structures Manufacturing Method Based on Laser-assisted Electrochemical Deposition

Re-entrant structures fabricated on the metal surface have a significant effect on the surface properties of metallic materials. It has attracted more and more attention due to its hydrophobicity, sound absorption, and anti-reflection property. This study proposed a method based on laser-assisted electrochemical deposition. First, microcolumn array substrates were prepared by laser etching. The substrate was prepared by laser etching, and subsequently the micro re-entrant structures were manufactured via localized electrodeposition under the tip effect. The volume deposition rate can reach $924.8\ \mu\mathrm{m}3/\mathrm{s}$, and the static structure hydrophobic angle was 133° after electrochemical deposition, which is 18% higher than that after laser etching. It must be a new method and a new way to fabricate re-entrant structures on the metal substrate.