Extensive research on hydrophobic/hydrophilic surface treatments has been thus far reported. Most have been focused on the maximum achievable static contact angle (CA) and minimum contact area between the probe liquid and the surface. In contrast to such research trends, recently the importance of dynamic CAs (advancing/receding CAs) and CA hysteresis (difference between advancing/receding CAs) have been recognized in terms of how easily liquids are removed from solid surfaces. Through control

more »

... f CA hysteresis, we can realize excellent sliding properties even for organic liquids with low surface tensions without the use of perfluorinated compounds. In this article, by reviewing recent research trends and our own recent research results regarding oleophobic and superoleophobic treatments, we introduce a new concept to achieve low CA hysteresis surfaces showing low tilt angles of probe liquids.