Gecko Grip

Gecko can walk on a smooth glass against the gravitational force too....

What makes a gecko foot stick is the attractive force – the van der Waals force – between millions of microscopic hairs on its feet and the surface.



Close-up of the underside of a gecko's foot as it walks on a glass wall. Van der Waals force interactions between the finely divided setae (hairs on the toes) and the glass enable the gecko to stay in place and to walk on the seemingly smooth glass.