Wetting transition of water on graphite and other surfaces

Details Wetting transition of water on graphite and other surfaces Wetting transition of water on graphite and other surfaces

2004-04-14

arxiv.org/abs/cond-mat/0404346v1

Physics

Condensed Matter

Materials Science

14 pages, 2 figures

Scientific paper

A wetting transition occurs when the contact angle of a liquid drop on a surface changes from a nonzero value to zero. Such a transition has never been observed for water on any solid surface. This paper discusses the value of the temperature T_w at which the transition should occur for water on graphite. A simple model, previously used for nonpolar fluids, predicts the value of $T_w$ as a function of the well-depth D of the adsorption potential. While $D$ is not well known for the case of water/graphite, the model implies that T_w is likely to fall in the range 350 to 500 K. Experimental search for this transition is warranted. Water wetting transition temperatures on other surfaces are also discussed.

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