Reversible wettability transition between superhydrophilicity and superhydrophobicity through alternate heating-reheating cycle on laser-ablated brass surface

摘要: Abstract Functional surfaces with reversible wettability transition between superhydrophobicity and superhydrophilicity have attracted much attention due to their potential applications in self-cleaning, anti-icing, anti-fogging, anti-biofouling, oil-water separation, along smart membranes, sensors, microfluidic devices. In order achieve such transition, the surface or intrinsic Young contact angle must be able reversibly change upon being stimulated by external factors. Meanwhile, structure sufficient ability magnify this wettability. For metals, metallic oxides some other materials, can changed controlling adsorption decomposition of airborne organic compounds on these via different methods as ultraviolet irradiation, long-term storage at room temperature heating treatments combinations. study, we reported for first time that realized a laser-ablated brass using alternate heating-reheating cycles. Our study demonstrated substrate material caused great reduction width Wenzel region separating Cassie-Baxter full wetting micro/nano-scale hierarchical are responsible observed transition.