Static Hydrophobic Cuprous Oxide Surface Fabricated via One-Step Laser-Induced Oxidation of a Copper Substrate.

In this study, we developed a one-step method for fabricating hydrophobic surfaces on copper (Cu) substrates. Cuprous oxide (CuO) with low free energy was successfully formed after low-fluence laser direct irradiation. The formation of CuO enhanced the hydrophobicity of the Cu substrate surface, and the contact angle linearly increased with the proportion of CuO.