[1][2][3] The liquid must have a surface energy well-matched to the substrate in order to form a stable film.
The free flowing liquid allows for the creation of a smooth surface with the ability to self-repair.
Finally, SLIPS surfaces can be made optically transparent unlike many traditional superhydrophobic surfaces that scatter light due to having structure on the same order as visible light.
[9] In this regard, replacing the lubricant in SLIPS with a phase switching liquid (PSL) [10] can yield promising results.
Thus the PSL changes into solid phase in a cold environment before water freezing can happen.