Laser Texture Deposition of Superhydrophobic Surfaces: Fabrication and Mechanism

Herein, a tunable superhydrophobic layer is fabricated on stainless steel and brass via laser texture deposition (LTD) combined with fatty acid modification. LTD forms hierarchical micro/nanostructures that enrich the surface morphology and create abundant adsorption sites for organic molecules. Subsequent treatments with octanoic acid (C8) and stearic acid (C18) transform the surface from superhydrophilic (contact angle, CA < 10°) to superhydrophobic (CA > 150°). C18 exhibits superior performance. X‐ray photoelectron spectroscopy analysis reveals that fatty acids increase the proportion of CC bonds, detach weakly bound surface species, and improve chemical uniformity. These findings highlight the mechanistic pathway of wettability transition. Under identical treatment conditions, brass achieves hydrophobicity more rapidly due to its intrinsically rougher texture and favorable chemical interactions, while stainless steel demonstrates higher abrasion resistance. LTD combined with tailored fatty acid modification provides an efficient and cost‐effective strategy for constructing multifunctional superhydrophobic metal surfaces. The resulting surfaces offer both tunable wettability and mechanical robustness.