Journal
APPLIED PHYSICS LETTERS
Volume 99, Issue 6, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3622640
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Funding
- National Natural Science Foundation of China [51076078]
- Specialized Research Fund for the Doctoral Program of Higher Education in China [20100002110047]
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The effects of solid-liquid interfacial shape on the boundary velocity slip of patterned hydrophobic surfaces are investigated. The scaling law in literature is extended to demonstrate the role of such shape, indicating a decrease of the effective slip length with increasing interfacial roughness. A patterned surface with horizontally aligned carbon nanotube arrays reaches an effective slip length of 83 nm, by utilizing large intrinsic slippage of carbon nanotube while keeping away from the negative effects of interfacial curvature through the flow direction. The results emphasize the importance of avoiding the solid-liquid interfacial roughness in low-friction patterned surface design and manufacture. (C) 2011 American Institute of Physics. [doi:10.1063/1.3622640]
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