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Super‐Hydrophobic PDMS Surface with Ultra‐Low Adhesive Force
Author(s) -
Jin Meihua,
Feng Xinjian,
Xi Jinming,
Zhai Jin,
Cho Kilwon,
Feng Lin,
Jiang Lei
Publication year - 2005
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.200500458
Subject(s) - polydimethylsiloxane , materials science , lotus effect , contact angle , composite number , composite material , adhesive , nano , microstructure , wetting , etching (microfabrication) , nanotechnology , microlens , layer (electronics) , optics , lens (geology) , chemistry , raw material , physics , organic chemistry
Summary: Rough polydimethylsiloxane (PDMS) surface containing micro‐, submicro‐ and nano‐composite structures was fabricated using a facile one‐step laser etching method. Such surface shows a super‐hydrophobic character with contact angle higher than 160° and sliding angle lower than 5°, i.e. self‐cleaning effect like lotus leaf. The wettabilities of the rough PDMS surfaces can be tunable by simply controlling the size of etched microstructures. The adhesive force between etched PDMS surface and water droplet is evaluated, and the structure effect is deduced by comparing it with those own a single nano‐ or micro‐scale structures. This super‐hydrophobic PDMS surface can be widely applied to many areas such as liquid transportation without loss, and micro‐pump (creating pushing‐force) needless micro‐fluidic devices.Etched PDMS surface containing micro‐, submicro‐, and nano‐composite structures shows a self‐cleaning effect with water CA as high as 162° and SA lower than 5°.