A drop of water as a model for the interplay of adhesion and stiction

Physicists at the University of Zurich have developed a system that enables them to switch back and forth the adhesion and stiction (static friction) of a water drop on a solid surface. The change in voltage is expressed macroscopically in the contact angle between the drop and the surface. This effect can be attributed to the change in Read more about A drop of water as a model for the interplay of adhesion and stiction[…]