Journal
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
Volume 335, Issue 1-3, Pages 128-132Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.colsurfa.2008.10.047
Keywords
Wettability; Superhydrophobic; Amorphous carbon; Plasma
Categories
Funding
- Natural Science Foundation of Beijing [2062004]
- National Natural Science Foundation of China [50502001, 60576012]
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Stable and easily controllable wettability of a solid surface is of great significance in many applications. In the present studies, a-C films with special nano-structured surfaces were deposited on silicon and glass substrates with magnetron sputtering method. The morphologies of the surfaces vary with the deposition parameters. Therefore, these a-C surfaces can be controlled to exhibit different wettability in a wide range from the hydrophilicity to the super-hydrophobicity. The studies also prove that the CF4 plasma treatment will remarkably enhance the hydrophobicity of the a-C films. And the fluorinated a-C surfaces show an excellent super-hydrophobic property for all the pH values of the aqueous solution. Moreover, a super-hydrophobic surface of the non-fluorinated a-C film can be reversed to being very hydrophilic by the plasma treatment of H-2 or N2, while the fluorinated super-hydrophobic a-C films show a good stability. (C) 2008 Elsevier B.V. All rights reserved.
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