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Jeong, Hoon Eui
Multiscale Biomimetics & Manufacturing Lab
Research Interests
  • Biomimetics

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Wettability of nanoengineered dual-roughness surfaces fabricated by UV-assisted capillary force lithography

Cited 45 times inthomson ciCited 48 times inthomson ci
Title
Wettability of nanoengineered dual-roughness surfaces fabricated by UV-assisted capillary force lithography
Author
Jeong, Hoon EuiKwak, Moon KyuPark, Chan IckSuh, Kahp Yang
Keywords
Dual roughness; Hierarchical structure; Lithography; Wettability
Issue Date
200911
Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
Citation
JOURNAL OF COLLOID AND INTERFACE SCIENCE, v.339, no.1, pp.202 - 207
Abstract
Micro- and nanoscale combined hierarchical polymer structures were fabricated by UV-assisted capillary force lithography. The method is based on the sequential application of engraved polymer molds with a UV-curable resin of polyurethane acrylate (PUA) followed by surface treatment with a trichloro(1H,1H,2H,2H-perfluorooctyl) silane in vapor phase. Two distinct wetting states were observed on these dual-roughness structures. One is "Cassie-Wenzel state" where a water droplet forms heterogeneous contact with microstructures and homogeneous contact with nanostructures. The other is "Cassie-Cassie state" where a droplet makes heterogeneous contact both with micro- and nanostructures. A simple thermodynamic model was developed to explain static contact angle, hysteresis, and wetting transition on dual-roughness structures.
URI
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DOI
http://dx.doi.org/10.1016/j.jcis.2009.07.020
ISSN
0021-9797
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