Such structures are called amphiphobic. In order to create them not only topography (roughness), but also low surface energy, due to reducing intermolecular attractive forces and reducing adhesion of fingerprint materials on the surface, is required .
Due to the above-mentioned facts, in this article, as the color protecting coating, amphiphobic (i.e., oleo- and hydrophobic) layers were chosen for simulation (a refractive index of 1.47 has been chosen for simulations ).
Following the above, a 20 nm value of the protective (amphiphobic) layer was taken into further consideration.
The model took into account the number of layers, the oxide thickness, the actual dielectric constants of oxide layers (refractive index and extinction coefficient), optical properties of the medium, angle of observation, polarization and wavelength of the incidence light, and the assumed refractive index value of the protective, amphiphobic coating.
Compared with SiPU, FSiPUA demonstrated much lower water and oil solvent absorptions due to the common effect of hydrophobic siloxane chains and amphiphobic fluorinated chains.
When the amphiphobic fluorinated components existed in the core phase, relatively few fluorinated components were placed on the film surface.
The shell region was occupied by SiPU, while the core region was amphiphobic fluorinated polyacrylate.