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Condensed water on superhydrophobic carbon films

Published online by Cambridge University Press:  31 January 2011

Xingcheng Xiao ,
Yang Tse Cheng ,
Brian W. Sheldon  and
Janet Rankin
Xingcheng Xiao*
Affiliation:
Materials Processes Laboratory, General Motors Research and Development Center, Warren, Michigan 48090
Yang Tse Cheng
Affiliation:
Materials Processes Laboratory, General Motors Research and Development Center, Warren, Michigan 48090
Brian W. Sheldon
Affiliation:
Engineering Division, Brown University, Providence, Rhode Island 02912
Janet Rankin
Affiliation:
Engineering Division, Brown University, Providence, Rhode Island 02912
*
a)Address all correspondence to this author. e-mail: xingcheng.xiao@gm.com
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Abstract

Nanostructured carbon materials, including carbon nanotubes, nanofibers, and nanowalls, exhibit a wide range of interesting properties dictated by the many different bonding configurations. Many of these materials can possess superhydrophobic behavior when water drops are placed on their surfaces: these drops have high contact angles and can roll freely on the surfaces, which is desirable for self-cleaning. In this work, we prepared porous carbon films using a microwave plasma enhanced chemical vapor deposition technique. These films showed superhydrophobicity with contact angle of 150°, which was explained by the synergetic effect of the highly rough surface combined with the hydrogen terminated edges of graphene sheets. However, the condensed water drops can behave differently: the drops did not roll readily. This behavior mimicked that of water on lotus leaves and further demonstrated that the reported superhydrophobic behavior is a function of how the water gets on to the surfaces.

Keywords

CNanostructureSurface chemistry
Type
Articles
Information
Journal of Materials Research , Volume 23 , Issue 8 , August 2008 , pp. 2174 - 2178
Copyright
Copyright © Materials Research Society 2008

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References

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