Slip flow of diverse liquids on robust superomniphobic surfaces.
Water slips exist over superhydrophobic solid surfaces, but the slip flow of diverse liquids on a single surface has not been deliberately studied to date. Here, we report the slip flow behavior of a variety of liquids with different surface tensions and viscosities on a robust omniphobic surface. This surface displayed a dramatic slippage effect and thus a high drag reduction efficiency of approximately 10-20% for all liquids, depending on both liquid viscosity and surface energy. The observed liquid slip was attributed to the surface dual micro/nanostructure and the low-surface-energy coating.
State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China; University of Chinese Academy of Science, Beijing 100039, China.
Yang
Y
Wu
Meirong
M
Cai
Zhenquan
Z
Li
Xinwang
X
Song
Hongyan
H
Wang
Xiaowei
X
Pei
Feng
F
Zhou
Drag reduction; Liquids; Slip length; Superomniphobic surface