Superhydrophobicity of electrospray-synthesized fluorinated silica layers

► Superhydrophobic SiO2 layers through a combination of a nanoscale surface roughness and fluorination are realized. ► The nanoscale surface roughness is obtained by electrospraying SiO2 precursor solutions. ► Subsequent fluorination treatment exhibits outstand repellency toward various liquid droplets. ► The SiO2 layers were excellent in light of the durability in water, ultraviolet resistance, and thermal stability.