K. Tadanaga et al., Superhydrophobic-superhydrophilic micropatterning on flowerlike alumina coating film by the sol-gel method, CHEM MATER, 12(3), 2000, pp. 590
A never route to form superhydrophobic-superhydrophilic micropatterned coat
ing film has been developed. UV light was irradiated on the superhyrdrophob
ic coating film which consists of three layers, a flowerlike Al2O3 gel film
, a very thin TiO2 gel layer, and a FAS layer, to cleave the fluoroalkyl ch
ain in FAS selectively, and well-defined superhydrophobic and superhydrophi
lic regions were formed.