TY - JOUR
T1 - Large slip of aqueous liquid flow over a nanoengineered superhydrophobic surface
AU - Choi, Chang Hwan
AU - Kim, Chang Jin
PY - 2006
Y1 - 2006
N2 - While many recent studies have confirmed the existence of liquid slip over certain solid surfaces, there has not been a deliberate effort to design and fabricate a surface that would maximize the slip under practical conditions. Here, we have engineered a nanostructured superhydrophobic surface that minimizes the liquid-solid contact area so that the liquid flows predominantly over a layer of air. Measured through a cone-and-plate rheometer system, the surface has demonstrated dramatic slip effects: a slip length of ∼20 μm for water flow and ∼50 μm for 30 glycerin. The essential geometrical characteristics lie with the nanoposts populated on the surface: tall and slender (i.e., needlelike) profile and submicron periodicity (i.e., pitch).
AB - While many recent studies have confirmed the existence of liquid slip over certain solid surfaces, there has not been a deliberate effort to design and fabricate a surface that would maximize the slip under practical conditions. Here, we have engineered a nanostructured superhydrophobic surface that minimizes the liquid-solid contact area so that the liquid flows predominantly over a layer of air. Measured through a cone-and-plate rheometer system, the surface has demonstrated dramatic slip effects: a slip length of ∼20 μm for water flow and ∼50 μm for 30 glycerin. The essential geometrical characteristics lie with the nanoposts populated on the surface: tall and slender (i.e., needlelike) profile and submicron periodicity (i.e., pitch).
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U2 - 10.1103/PhysRevLett.96.066001
DO - 10.1103/PhysRevLett.96.066001
M3 - Article
AN - SCOPUS:33144486741
SN - 0031-9007
VL - 96
JO - Physical Review Letters
JF - Physical Review Letters
IS - 6
M1 - 066001
ER -