However, superoleophobicity and oil repellency collapse at
the concentration of 4% w/w, according to the results of Fig. 3b,
implying that the low surface tension oil droplet sinks into the
rough surface thus corresponding to a transition from the nonsticking,
repellent state to the droplet-pinned state. A breakdown
of superoleophobicity on structured surfaces was described in earlier
studies [56–59]. The same behavior is reported in Fig. 3c for
dodecane droplets