© 2017 by "Microfluidics News". 

News Archives
Please reload

[PNAS]Monostable superrepellent materials

March 12, 2017



Superrepellency is an extreme situation where liquids stay at the tops of rough surfaces, in the so-called Cassie state. Owing to the dramatic reduction of solid/liquid contact, such states lead to many applications, such as antifouling, droplet manipulation, hydrodynamic slip, and self-cleaning. However, superrepellency is often destroyed by impalement transitions triggered by environmental disturbances whereas inverse transitions are not observed without energy input. Here we show through controlled experiments the existence of a “monostable” region in the phase space of surface chemistry and roughness, where transitions from Cassie to (impaled) Wenzel states become spontaneously reversible. We establish the condition for observing monostability, which might guide further design and engineering of robust superrepellent materials.



Yanshen Li, David Quéré, Cunjing Lv, and Quanshui Zheng


Yanshen Li, doi: 10.1073/pnas.1614667114


Link: http://www.pnas.org/content/early/2017/03/08/1614667114

Share on Facebook
Share on Twitter
Please reload

Follow "Microfluidics News"