Directing the transportation of a water droplet on a patterned superhydrophobic surface

Qian Feng Xu; Jian Nong Wang; Smith, Ian H.; Sanderson, Kevin D.
December 2008
Applied Physics Letters;12/8/2008, Vol. 93 Issue 23, p233112
Academic Journal
Directional transportation of a ball-like water droplet on a superhydrophobic (SH) surface has been experimentally demonstrated. A SH surface with a water contact angle of as high as 160° and a sliding angle close to 0° is prepared by a sol-gel method based on removable polymeric nanospheres. A designed path line is then created on the prepared SH surface. The contact angle possesses anisotropy on the patterned SH surface. When the tilted angle of the patterned SH surface and the volume of the water droplet are proper, the sliding of a ball-like water droplet follows the designed line precisely.


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