Abstract
Wetting is the interaction of a liquid with a solid and is found in numerous natural processes as well as being of extreme importance to many industrial and engineering processes, such as absorption, distillation, flotation, gas scrubbing, condensation. Wetting is of key importance in boiling process, because contact angle, that is the measure of the degree of wetting, affects density of active nucleation sites, bubble departure diameter, and finally critical heat flux [. If the liquid will completely spread out on the solid surface and the contact angle will be close to zero degrees, the surface is called superhydrophilic. Less hydrophilic surfaces will have contact angle below 90o. If the surface is hydrophobic, the contact angle will be larger than 90o. Surfaces with contact angle larger than 150o are called superhydrophobic Fig. 1.
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