Wettability-Controllable Super Water- and Moderately Oil-Repellent Surface Fabricated by Wet Chemical Etching

A facile fabrication method is presented for a super-repellent surface, in which a silicon wafer is etched with a wet chemical method and treated by a fluorinated self-assembled monolayer. This surface is composed of harshly rough nanostructures and highly dense nanoholes. The contact angle of both...

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Bibliographic Details
Published in:Langmuir 2009-06, Vol.25 (11), p.6576-6579
Main Authors: Kim, Tae-il, Tahk, Dongha, Lee, Hong H.
Format: Article
Language:English
Subjects:
Chemistry
Colloidal state and disperse state
Devices and Applications: Sensors, Fluidics, Patterning, Catalysis, Photonic Crystals
Exact sciences and technology
General and physical chemistry
Surface physical chemistry
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Summary:A facile fabrication method is presented for a super-repellent surface, in which a silicon wafer is etched with a wet chemical method and treated by a fluorinated self-assembled monolayer. This surface is composed of harshly rough nanostructures and highly dense nanoholes. The contact angle of both water and oil with the surface is larger than 150°. The self-cleaning capability of the surface allows for the removal of sticky powders with glycerin droplet. Any desired part(s) of the super-repellent surface can be turned superamphiphilic by simply exposing the desired part(s) to ultraviolet light.
ISSN:0743-7463
1520-5827
DOI:10.1021/la900106s