Formation of superhydrophobic soda-lime glass surface using femtosecond laser pulses

[Display omitted] ▸ We formed superhydrophobic soda-lime glass surface by femtosecond laser pulses. ▸ Periodic microstructures are printed on the glass surface for superhydrophobicity. ▸ The contact angle of water droplet on the microstructured glass surface is 155°. ▸ The transparency of superhydrophobic glass is higher than 77% in visible spectrum. ▸ We explain the formation mechanism of superhydrophobic soda-lime glass surface. This paper demonstrates the fabrication of superhydrophobic soda-lime glass surface by engineering periodic microgratings with self-formed periodic micro-ripples inside the microgratings using a single beam femtosecond laser. The wetting property of the microstructured surface is improved from hydrophobic to superhydrophobic, presenting a water droplet contact angle ranges from 152° to 155°. The microstructured glass surface shows excellent transparency, which is higher than 77% in the visible spectrum. We strongly believe that our proposed technology can achieve superhydrophobic glass surfaces over a large area for applications in diverse fields.