Hierarchically textured surfaces of versatile alloys for superamphiphobicity

• Superamphiphobic surfaces are obtained via a facile two-step method based on versatile alloys.
• Our low-cost and time-saving method is easy to operate and the superamphiphobic surfaces can be easily recovered if partly damaged mechanically.
• The hierarchical structures account for the superamphiphobicity in our experiment.

We herein report a facile approach to realize superamphiphobicity based on versatile engineering alloys. Conventionally, the methods employed to endow solid surfaces with super-nonwetting properties rely on complicated manufacturing processes of micro/nanoscale structures or delicate chemical modifications or their combinations, however, suffering from high costs and complexity. In this work, superamphiphobicity is successfully obtained through a facile two-step method. We employ the chemical corrosion process to create surface with microscale roughness followed by the deposition of candle soot film with nanoscale textures, obtaining the hierarchical structures resultantly which could satisfactorily account for the physical origin of the superamphiphobicity here: superhydrophobicity with a water contact angle (CA) of ~160°, and near-superoleophobicity with a glycerol CA of ≥130°. Our method offers the industrial community a novel approach for manufacturing self-cleaning and antifouling smart materials.